Measurement data monitoring via testo Smart Probes App
Measurement data dispatch via testo Smart Probes App
Extremely precise, extremely rugged, extremely practical – with visual alarm and backlit display
Measures pressure and calculates the evaporation temperature of H2O automatically

Extremely precise, rugged and practical: the testo 552 digital vacuum gauge. Ideal for evacuating refrigerant systems or heat pumps.

Product Description:
The testo 552 is a high-precision digital vacuum gauge designed to provide you with absolutely reliable readings. It has all the measuring functions you need for evacuating refrigerant systems and heat pumps and is built to last and tough enough to take the odd knock.
Via a Bluetooth interface, the testo 552 connects with the testo Smart Probes App on your smartphone or tablet. This allows you to monitor the absolute pressure reached during the evacuation conveniently and wirelessly. In addition to this, the measurement results can be quickly documented in the App and sent by e-mail.

The testo 552 digital vacuum gauge – areas of application
Evacuating is one of the most important steps when it comes to installing or restarting refrigerant or air conditioning systems: foreign gases, moisture and oils have to be removed properly. That’s when the absolute pressure of a system needs to be measured.
And that’s exactly what the testo 552 digital vacuum gauge is designed to do: the meter provides you with highly accurate information regarding the dehumidification status of the system and is able to measure even the smallest of absolute pressures absolutely reliably. This means that you are always able to observe manufacturer specifications. A visual alarm warns immediately when a threshold has been exceeded.
And because the digital vacuum gauge is IP42 rated (water resistant and dirt proof), it is virtually impervious to moisture and dirt.

Technical data:
Absolute Pressure:
Measuring range: 0 to 26.66 mbar /
0 to 20000 micron
Accuracy: ±(10 micron + 10 % of mv) (100 to 1000 micron)
Resolution: 1 micron (0 to 1000 micron) /
10 micron (1000 to 2000 micron) /
100 micron (2000 to 5000 micron) /
Overload: absolute: 6.0 bar / 87 psi
(relative: 5.0 bar / 72 psi)

General technical data:
Dimensions: 160 x 110 x 50 mm
Operating temperature: -10 to +50 °C
Protection class: IP42
System requirements: requires iOS 8.3 or newer; requires Android 4.3 or newer; requires mobile end device with Bluetooth 4.0
Battery type: 2 AA
Battery life: 50 hrs (without Bluetooth/backlighting)
Connection: 2 x 7/16“ UNF
Interface: Bluetooth® 4.0 wireless technology
Parameter: mbar; micron; mmHg; Torr; inHg; inH20; hPa; Pa
Measuring rate: 0.5 s
Storage temperature: -20 to +50 °C
Weight: 500 g

Measurement of high and low pressure
Quick and easy installation at the pressure connection
Low refrigerant loss thanks to hose-free application
Measuring range -1 to +60 bar

The professional and compact testo 549i high-pressure measuring instrument can be controlled via the testo Smart Probes App using your smartphone or tablet, and is ideal for carrying out servicing and troubleshooting on air conditioning and refrigeration systems. The App also enables evaporation and condensation temperatures to be calculated automatically.

Product Description:
Testo offers you greater mobility when measuring: used in conjunction with your smartphone or tablet, the handy testo 549i high-pressure measuring instrument is suitable for carrying out wireless servicing and troubleshooting on air conditioning and refrigeration systems, as well as for installing them. The measuring instrument can be set up quickly and easily, directly at the pressure connection. The testo 549i makes working on widely spaced pressure connections considerably easier thanks to wireless connection to a smartphone or tablet. Also practical: no hoses are required for measurements, meaning that no or only very little refrigerant is lost. When used in conjunction with the testo 115i clamp thermometer, individual refrigeration system parameters can also be calculated.

More measuring convenience thanks to the App
Readings can be viewed conveniently on your terminal device via the testo Smart Probes App. The App also enables evaporation and condensation temperatures to be calculated automatically. All measurement data is displayed either as a chart or in table form. The measurement data log can be emailed directly as a PDF or Excel file.

System requirements:
iOS 8.3 or later
Android 4.3 or later
Bluetooth 4.0

Technical data:
Pressure measurement:
Measuring range: -1 to +60 bar
Accuracy: ±0.5 % of fsv
Resolution: 0.01 bar
Probe connection: 7 / 16 " UNF
Overload rel. (high pressure): +65 bar

General technical data:
Dimensions: 125 x 32 x 31 mm
Operating temperature: -20 to +50 °C
System requirements: requires iOS 8.3 or newer; requires Android 4.3 or newer; requires mobile end device with Bluetooth 4.0
Battery type: 3 AAA micro batteries
Battery life: 150 h
Pressure media: CFC, HFC, HCFC, N, H₂O, CO₂
Storage temperature: -20 to +60 °C

Non-contact infrared measurement of surface temperature
Easy selection of emission level via stored materials list
Highly visible marking of the measuring spot thanks to 8-point laser
Image documentation with readings and measuring spot marking

Carry out non-contact and App-controlled measurement of wall temperatures, as well as fuse and component temperatures in air conditioning systems: with the professional testo 805i infrared thermometer with 8-point laser circle for highly visible measuring spot marking.

Product Description:
The testo 805i infrared thermometer, in conjunction with a smartphone or tablet, functions as a compact IR thermometer for wall temperatures, as well as fuse and component temperatures in air conditioning systems. The measuring point is marked clearly with a laser circle made up of eight dots – so you always know precisely where to measure.

Documentation including images via App on a smartphone/tablet
With the testo Smart Probes App installed on a terminal device, users can view their readings conveniently. And that's not all: the App can also be used to create and document images, including temperature values and laser marking. A separate measurement menu makes it easier to detect areas that are susceptible to mould. Particularly useful: a list containing the emission levels of certain materials is already stored in the App, so there's no longer any need to waste your time looking these up in tables. All measurement data is displayed either as a chart or in table form. The measurement data log can then be emailed directly as a PDF or Excel file.

System requirements:
iOS 8.3 or later
Android 4.3 or later
Bluetooth 4.0

Technical data:
Temperature Infrared:
Measuring range: -30 to +250 °C
Accuracy: ±1.5 °C or ±1.5 % of mv (0 to +250 °C)
±2 °C (-20 to -0.1 °C)
±2.5 °C (-30 to -20.1 °C)
Resolution: 0.1 °C

General technical data:
Dimensions: 140 x 36 x 25 mm
Operating temperature: -10 to +50 °C
System requirements: requires iOS 8.3 or newer; requires Android 4.3 or newer; requires mobile end device with Bluetooth 4.0
Battery type: 3 AAA micro batteries
Battery life: 30 h
Storage temperature: -20 to +60 °C

Measurement of the flow and return temperature of heating systems
Measurement of temperatures in refrigeration systems in order to calculate superheating and subcooling
Easy to use at measuring points that are far apart
Rapid detection of temperature changes via graphical progress display

Combined with a smartphone or tablet, the testo 115i clamp thermometer is the ideal temperature measuring instrument for carrying out servicing and troubleshooting on air conditioning and refrigeration systems, as well as for installing them. It can also be used to measure flow and return temperatures.

Product Description
Professional measuring technology is now mobile: when it comes to temperature measurements at widely spaced measuring points in particular, the testo 115i makes things much easier – thanks to a wireless connection to the smartphone or tablet. When used in conjunction with the testo 549i pressure measuring instrument, individual refrigeration system parameters can also be calculated.

Measuring using the App offers lots of advantages
Measurement data is transmitted wirelessly from the clamp thermometer to the testo Smart Probes App and can be viewed conveniently on your smartphone or tablet – either as a chart or in table form. Temperature changes are therefore immediately evident. The measurement data log can be emailed directly as a PDF or Excel file. This saves you time, allowing you to further increase your efficiency.

System requirements:
iOS 8.3 or later
Android 4.3 or later
Bluetooth 4.0

Technical data:
Temperature NTC:
Measuring range: -40 to +150 °C
Accuracy: ±1.3 °C (-20 to +85 °C)
Resolution: 0.1 °C

General technical data:
Dimensions: 183 x 90 x 30 mm
Operating temperature: -20 to +50 °C
System requirements: requires iOS 8.3 or newer; requires Android 4.3 or newer; requires mobile end device with Bluetooth 4.0
Battery type: 3 AAA micro batteries
Battery life: 150 h
Storage temperature: -20 to +60 °C

Measurement of air velocity, volume flow and temperature
Display of the volume flow of multiple outlets in order to adjust systems
Easy parametrization of the outlet (dimension and geometry)
Convenient viewing of readings on a smartphone/tablet with the testo Smart Probes App

Professional measuring technology in a small format: the compact testo 410i vane anemometer with smartphone operation measures the volume flow, air velocity and temperature at air outlets quickly and reliably. The testo Smart Probes App enables readings to be viewed conveniently and offers intelligent additional functions.

Product Description:
It fits perfectly into any shirt pocket: the testo 410i vane anemometer is ideal for measuring air velocity and temperature at air outlets and ventilation grilles. Even measuring and adjusting the volume flow is easy. The testo 410i gives you huge flexibility, so you can adapt to any unplanned measuring requirements in your everyday work.
Measuring convenience thanks to the App
The testo 410i combines professional Testo measuring technology with the efficient functions of an App. Your smartphone or tablet is used as a convenient display for your measuring values on site. You can view all measurement data via the testo Smart Probes App, and email the log immediately as a PDF or Excel file.

Configuration of the volume flow measurement is really easy with the App, partly due to the fact that you can carry out parametrization of the outlet (dimension, geometry) intuitively. Particularly useful: when adjusting a ventilation system, volume flows of multiple outlets can be cross-checked and compared. Timed and multi-point mean calculation also gives you a quick indication of the average air velocity, for example at a ventilation grille.

System requirements:
iOS 8.3 or later
Android 4.3 or later
Bluetooth 4.0

Technical data:
Temperature NTC:
Measuring range: -20 to +60 °C
Accuracy: ±0.5 °C
Resolution: 0.1 °C

Velocity Vane:
Measuring range: 0.4 to 30 m/s
Accuracy: ±(0.2 m/s + 2 % of mv) (0.4 to 20 m/s)
Resolution: 0.1 m/s

General technical data:
Dimensions: 154 x 43 x 21 mm: Operating temperature: -20 to +50 °C
System requirements: requires iOS 8.3 or newer; requires Android 4.3 or newer; requires mobile end device with Bluetooth 4.0
Battery type: 3 AAA micro batteries
Battery life: 130 h
Diameter vane: 40 mm
Storage temperature: -20 to +60 °C

Automatic calculation of the dew point and wet-bulb temperature
Measurement data analyzed and sent via testo Smart Probes App
Clear identification of areas susceptible to mould via traffic light principle

The compact testo 605i temperature and humidity measuring instrument features professional measuring technology in an intelligent format: it can be used in conjunction with a smartphone/tablet and the testo Smart Probes App to reliably measure air temperature and humidity in rooms and ducts.

Product Description:
In addition to measuring air temperature and relative humidity in rooms and ducts, the thermohygrometer is also suitable for checking air conditioning system humidifiers. When you use the testo 605i in conjunction with the testo 805i infrared thermometer, you can clearly identify areas susceptible to mould via the traffic light principle, with the assistance of a measurement menu that is already stored in the App.

Measure more efficiently using the App
The testo 605i wirelessly transmits the measurement data via Bluetooth to your own smartphone or tablet. With the testo Smart Probes App installed on your terminal device, you can view your readings conveniently. The App also enables the dew point and wet-bulb temperature to be determined automatically. All measurement data is displayed either as a chart or in table form. The measurement data log can then be emailed directly as a PDF or Excel file.

System requirements:
iOS 8.3 or later
Android 4.3 or later
Bluetooth 4.0

Technical data:
Temperature NTC:
Measuring range: -20 to +60 °C
Accuracy: ±0.8 °C (-20 to 0 °C)
±0.5 °C (0 to +60 °C)
Resolution: 0.1 °C

Humidity Capacitive:
Measuring range: 0 to 100 %RH
Accuracy: 5 to 80 %RH: ±(1.8 %RH + 3 % of mv) at +25 °C
Resolution: 0.1 %RH
General technical data:
Dimensions: 243 x 30 x 24 mm
Operating temperature: -20 to +50 °C
System requirements: requires iOS 8.3 or newer; requires Android 4.3 or newer; requires mobile end device with Bluetooth 4.0
Battery type: 3 AAA micro batteries
Battery life: 150 h
Length probe shaft: 100 mm
Storage temperature: -20 to +60 °C

For measuring volume flow, air velocity and temperature
Simple configuration of the dimension and geometry of the duct cross-section for determining the volume flow
Convenient for working in ventilation ducts thanks to its telescopic tube, which can be extended up to 400 mm
Really convenient to operate thanks to the testo Smart Probes App (e.g. easy viewing of readings, measurement data trend, log function)

With the testo 405i hot wire anemometer, you can measure air velocities, temperatures and volume flows. Via Bluetooth, the readings are transmitted wirelessly straight to the testo Smart Probes App on your smartphone or tablet. You can view the values conveniently and use numerous intelligent features.

Product Description:
No more surprises: the testo 405i thermal anemometer with smartphone operation from the Testo Smart Probes series is ideal for carrying out measuring tasks in ventilation ducts. It is easy to use the anemometer to determine air velocity, temperature and volume flows. The testo 405i is also suitable for measuring indoor air velocity. Practical when, for example, you want to locate non-airtight windows. Cooling capacities and heating outputs can also be calculated when used in conjunction with the testo 605i thermohygrometer.

Operation independent of measuring location via your smartphone
The testo 405i hot wire anemometer combines professional Testo measuring technology with App-based operation. This means you benefit from numerous additional functions in your day-to-day work. With the testo Smart Probes App, you can view readings conveniently on your smartphone or tablet. You no longer have to spend ages trying to make out the display at poorly accessible points. Volume flow can also be measured easily using the App: following intuitive input of the duct cross-section, the App calculates this completely automatically.

The App opens up other practical options too: it not only displays measurement data, but also evaluates and documents it. It is easy to carry out a timed and multi-point mean calculation with the App. It also displays the measurement data curve at the press of a button. And sends the measurement data logs as PDF or Excel files.

System requirements:
iOS 8.3 or later
Android 4.3 or later
Bluetooth 4.0

Technical data:
Temperature NTC:
Measuring range: -20 to +60 °C
Accuracy: ±0.5 °C
Resolution: 0.1 °C

Velocity Hot wire:
Measuring range: 0 to 30 m/s
Accuracy: ±(0.1 m/s + 5 % of mv) (0 to 2 m/s)
±(0.3 m/s + 5 % of mv) (2 to 15 m/s)
Resolution: 0.01 m/s

General technical data:
Dimensions: 200 x 30 x 41 mm: Operating temperature: -20 to +50 °C
System requirements: requires iOS 8.3 or newer; requires Android 4.3 or newer; requires mobile end device with Bluetooth 4.0
Battery type: 3 AAA micro batteries
Battery life: 15 h
Length probe shaft: 400 mm
Storage temperature: -20 to +60 °C

Easy parametrization of the outlet/duct cross-section for measuring the volume flow
List of multiple volume flows and calculation of the total volume flow (in the log)
Identification of mould risk thanks to the combined utilization of testo 605i and testo 805i
Rapid image documentation with IR temperature readings and measuring spot marking

With the Testo Smart Probes VAC set, you can check air velocities, humidity, volume flows and temperatures in, on and around air conditioning systems. The robust testo Smart Case enables the measuring instruments to be conveniently transported and ensures that they are always to hand when needed.

Product Description:
The compact testo Smart Probes VAC set includes four measuring instruments that can be used with your smartphone/tablet for key measuring tasks carried out by VAC engineers: the testo 405i thermal anemometer. the testo 410i vane anemometer, the testo 605i thermohygrometer and the testo 805i infrared thermometer.

Advantages of the testo Smart Probes VAC set
The measuring instruments in the testo Smart Probes VAC set can be connected quickly and easily to your smartphone or tablet via Bluetooth. You can therefore measure air velocities, humidity, volume flows and temperatures with intuitive ease using the testo Smart Probes App. The measuring instruments are easy to transport in the handy testo Smart Case and always to hand when needed.

Advantages and applications of the individual measuring instruments:

testo 405i: thermal anemometer with smartphone operation
Measurement of air velocity, volume flow and temperature
Simple configuration of the dimension and geometry of the duct cross-section for measuring the volume flow
Telescopic tube which can be extended to 400 mm

testo 410i: vane anemometer with smartphone operation
Measurement of air velocity, volume flow and temperature
Display of the volume flow of multiple outlets in order to adjust systems
Easy parametrization of the outlet (dimension and geometry)

testo 605i: Thermohygrometer with smartphone operation
Measurement of air humidity and temperature in rooms and ducts
Automatic calculation of the dew point and wet-bulb temperature

testo 805i: infrared thermometer with smartphone operation
Non-contact infrared measurement of surface temperature
Measuring spot marking via highly visible 8-point laser circle
Easy selection of emission level via stored materials list
Image documentation with readings and measuring spot marking

Practical App with special functions for measurement data analysis on your smartphone or tablet
Measurement data is transmitted wirelessly from the relevant measuring instrument to the testo Smart Probes App and can be viewed conveniently on mobile terminal devices – either as a chart or in table form. The App also offers practical functions such as timed and multi-point mean calculation, volume flow configuration, comparison of several volume flows at various outlets, automatic calculation of the dew point and wet-bulb temperature and identification of areas susceptible to mould via a clear traffic light system. The measurement data log can be emailed directly as a PDF or Excel file. This saves you time, allowing you to further increase your efficiency.

System requirements:
iOS 8.3 or later
Android 4.3 or later
Bluetooth 4.0

Technical data:
Temperature NTC:
Measuring range: -20 to +60 °C (testo 405i + testo 410i + testo 605i)
Accuracy: ±0.5 °C (testo 405i + testo 410i)
±0.8 °C (-20 to 0 °C) (testo 605i)
±0.5 °C (0 to +60 °C) (testo 605i)
Resolution: 0.1 °C (testo 405i + testo 410i + testo 605i)

Temperature Infrared:
Measuring range: -30 to +250 °C
Accuracy: ±1.5 °C or ±1.5 % of mv (0 to +250 °C)
±2 °C (-20 to -0.1 °C)
±2.5 °C (-30 to -20.1 °C)
Resolution: 0.1 °C

Humidity Capacitive:
Measuring range: 0 to 100 %RH
Accuracy: 5 to 80 %RH: ±(1.8 %RH + 3 % of mv) at +25 °C
Resolution: 0.1 %RH

Velocity Hot wire:
Measuring range: 0 to 30 m/s
Accuracy: ±(0.1 m/s + 5 % of mv) (0 to 2 m/s)
±(0.3 m/s + 5 % of mv) (2 to 15 m/s)
Resolution: 0.01 m/s

General technical data:
Dimensions: 200 x 30 x 41 mm (testo 405i)
140 x 36 x 25 mm (testo 805i)
154 x 43 x 21 mm (testo 410i)
243 x 30 x 24 mm (testo 605i)
Operating temperature: -20 to +50 °C (testo 405i + testo 410i + testo 605i)
-10 to +50 °C (testo 805i)
System requirements: requires Android 4.3 or newer; requires mobile end device with Bluetooth 4.0
Battery type: 3 micro batteries AAA (per Smart Probe)
Battery life: 15 h (testo 405i), 130 h (testo 410i), 150 h (testo 605i), 30 h (testo 805i)
Storage temperature: -20 to +60 °C
Diameter vane: 40 mm (testo 410i)

- Automatic and precise refrigerant charging according to target superheat, subcooling and weight thanks to intelligent valve
- Wireless connection and operation with Testo manifolds and testo Smart App via Bluetooth
- All measured values for the charging process at a glance with storage of the measured data in the testo Smart App
- Particularly handy thanks to compact housing, low weight, practical carrying handle and a robust plastic bag

Product Description
Charge refrigeration systems and heat pumps faster and more precisely: automatically with the testo 560i wireless refrigerant scale, the intelligent refrigerant valve, a digital manifold from Testo and/or the testo Smart App. Simply enter the charging program, target value for superheating, subcooling or weight in the manifold or App and the scale and valve will do the rest for you. Your benefits: Time saving and precise charging of the system.

testo 560i kit for automatic charging of refrigeration systems and heat pumps
- In the kit: digital refrigerant scale testo 560i and intelligent valve (both with Bluetooth), shoulder bag, batteries
- Automatic and precise refrigerant charging with the aid of refrigerant scale, intelligent valve as well as Testo manifold and/or testo Smart App
- Easy operation via Testo manifold or testo Smart App with automatic charging programs according to target value superheat, subcooling or refrigerant weight
- Flexible in confined environments: Scale and valve automatically connect via Bluetooth to the manifold and App on your smartphone/tablet
- All measured values for the charging process at a glance in the manifold and App with storage of the measured data in the App
- Compatible with the manifolds testo 557s/550s/550i as well as testo 557 /550, Smart Probes testo 115i/ 549i/605i, testo Smart App for Android and iOS

Advantages of the testo 560i refrigerant scale
- High measurement accuracy with resolution 10 g and output in kg
- Maximum load of 100 kg for all common refrigerant containers
- High Bluetooth range of up to 150 m together with a Testo manifold (alone up to 30 m)
- Safe handling: 3D corners for accurate positioning of the refrigerant container and textured rubber surface for stable grip
- High robustness due to dust and splash water protection (IP44)
- Especially handy thanks to compact housing, low weight, practical carrying handle and sturdy shoulder bag
- Long battery life of up to 70 hours thanks to replaceable AA batteries and auto power-off function
- High flexibility in outdoor use at temperatures from -10 to 50° C

Advantages of the refrigerant valve
- Especially robust thanks to IP54
- The valve can work up to 35 bar
- High Bluetooth range of up to 150 m together with a Testo manifold (alone up to 50 m)
- Long battery life of over 60 hours and replaceable 9 V block battery
- Very practical due to sturdy hook

Technical Data

testo 560i - Digital refrigerant scale with Bluetooth® - General technical data:
Operating humidity: 0 to 80 %RH
Weight: 4,36 kg (incl. batteries and bag)
Measuring range: 0 to 100 kg
Accuracy: Operating temperature +22 °C:
≤ ±(10 g+ 0,03 %rdg) (0 to 30 kg)
≤ ±(10 g+ 0,05 %rdg) (30 to 100 kg)
Resolution: 0,01 kg
Dimensions: 310 x 287 x 58 mm (LxWxH)
Operating temperature: -10 to +50 °C
Protection class: IP44
Battery type: 4 x type AA batteries
Battery life: > 70 h at +25 °C
Interface: Bluetooth® 4.2
Radio range: 30 m
Storage temperature: -10 to +50 °C

Refrigerant valve with Bluetooth - for digital refrigerant scale testo 560i - General technical data:
Operating humidity: 0 to 80 %RH
Weight: 570 g (incl. batteries)
Dimensions: 95 x 119 x 47 mm (LxWxH)
Operating temperature: -10 to +50 °C
Protection class: IP54
Product colour: black/orange; silver
Maximum working pressure: 35 bar
Battery type: 9 V (6LR61)
Battery life: >60 hrs + 3000 valve operations
Interface: Bluetooth® 4.2
Radio range: 50 m
Storage temperature: -10 to +50 °C

Easy, reliable work thanks to automatic measurement parameter detection
Comfortable, one-handed operation without any dial
Voltage range up to 1,000 V
Additional functions, such as true root mean square measurement TRMS, low-pass filter and temperature adapter

The testo 760-3 is the most high-performance model in Testo's digital multimeter family. In addition to automatic detection of measurement parameters, it is characterized by a voltage measuring range of up to 1,000 V along with large measuring ranges for frequency and capacitance. The digital multimeter is therefore also suitable for industrial applications.

Product Description:
The testo 760-3 digital multimeter is the multitasker for all important professionals in the electricity sector. It enables you to carry out both simple and demanding electrical measuring tasks more reliably than ever before. The testo 760-3 automatically detects the appropriate measurement parameter via the socket assignment and so prevents dangerous incorrect settings.

A voltage range of up to 1,000 V, a frequency range of up to 30 MHz and capacitance of up to 60,000 µF mean the testo 760-3 multimeter can also be used for industrial applications, such as troubleshooting in large electrical systems. And the integrated low-pass filter achieves more accurate measurement results on frequency converter controlled motors.

Temperatures can also be measured with this multimeter in addition to electrical parameters. You will need the clip-on type K thermocouple adapter and a temperature probe (both items can be ordered separately).

Technical data:
Temperature TC Type K (NiCr-Ni):
Measuring range: -20 to +500 °C
Accuracy: ±1 °C (0 to +100 °C)
Resolution: 0.2 °C

DC voltage:
Measuring Range: 0.1 to 1000 V
Resolution: 0.1 mV
Accuracy: ± (0.8 % of mv + 3 Digit)

AC voltage:
Measuring Range: 0.1 mV to 1000 V
Resolution: 0.1 mV
Accuracy: ± (1.0 % of mv + 3 Digit)

DC current:
Measuring Range: 0.1 μA to 10 A
Resolution: 0.1 μA
Accuracy: ± (1.5 % of mv + 5 Digit)

AC current:
Measuring Range: 0.1 μA to 10 A
Resolution: 0.1 μA
Accuracy: ± (1.5 % of mv to 5 Digit)

Resistance:
Measuring Range: 0.1 Ohm to 60.00 MOhm
Resolution: 0.1 Ohm
Accuracy: ± (1.5 % of mv + 3 Digit)

Capacitance:
Resolution: 0.01 nF
Measuring Range: 2 nF to 30.00 mF
Accuracy: ± (1.5 % of mv + 5 Digit)

Frequency:
Resolution: 0.001 Hz
Measuring Range: 0.001 Hz to 600.0 kHz
Accuracy: ± (0.1 % of mv + 1 Digit)

General technical data:
Dimensions: 167 x 85 x 45 mm
Operating temperature: -10 to +50 °C
Protection class: IP64
Storage temperature: -15 to +60 °C
Weight: 340 g
Overvoltage Category: CAT IV 600V; CAT III 1000V
Authorizations: CE; CSA

Instrument Measurement Functions:
Diode test: yes
Continuity testing: yes
Current probe measurement with adapter: yes
Display ligthing: yes
Hold: yes
MinMax: yes
Temperature measurement with adapter: yes
True RMS: yes
Low-pass filter: yes
Duty cycle measurement: yes
Display (counts): 6,000
μA current measuring range: yes
Autom. measurement parameter detection: yes

Voltage range up to 1,000 V
Waterproof and dustproof according to IP 67
Adjustable for phase detection or voltage indication
Visual and acoustic signal

The testo 745 non-contact voltage tester is ideally suited for fast initial checking of any suspected fault sources. It filters high-frequency interference signals and has a two-stage sensitivity setting.

Product Description:
The testo 745 non-contact voltage tester means you can quickly and easily determine voltage or de-energization. In contrast to most other models on the market, it has a filter for high-frequency interference signals which enables reliable voltage indication. If voltage is determined, the instrument gives a warning via a clear visual and acoustic signal.

The sensitivity of the instrument can be set in two stages: stage 1 for phase detection, stage 2 for voltage indication. The integrated torch also enables you to work safely in dark surroundings. In addition, the testo 745 voltage tester is both waterproof and dustproof according to IP 67.

Technical data:
DC voltage:
Measuring Range: 12 to 1000 V

AC voltage:
Measuring Range: 12 to 1000 V

General technical data:
Dimensions: 155 x 25 x 23 mm
Operating temperature: -10 to +50 °C
Protection class: IP67
Battery type: 3 AAA micro batteries
Storage temperature: -15 to +60 °C
Weight: 63 g
Overvoltage Category: CAT IV 600V; CAT III 1000V
Authorizations: CSA; CE

Instrument Measurement Functions:
Measuring point illumination: yes

Start your wireless measurements on refrigeration and air conditioning systems and heat pumps straight away. Thanks to the Bluetooth vacuum probe supplied, you can even measure vacuum without any cables or hoses. You will get the testo 557s smart digital manifold with Bluetooth and 4-way valve block, one testo 552i wireless vacuum probe (Bluetooth), two testo 115i wireless clamp thermometers (Bluetooth, NTC) and a robust transport case. For other wireless measurements, other optionally available testo Smart Probes are also ideal.

- Completely wireless measurements and all results at a glance: thanks to Bluetooth probes and large graphic display
- Exceptionally compact and reliable thanks to the easy-to-handle, robust housing with IP 54 protection class
- Easy, wireless, flexible measurements and documentation: Temperature and vacuum measurements via automatic Bluetooth® connection, testo Smart App for documentation and lots more

Applications: Refrigeration systems, air conditioning systems, heat pumps
- Determination of high and low pressure, automatic determination of condensation and evaporation temperature and calculation of superheating/subcooling. All results can be read simultaneously on one screen
- Tightness test: Recording and analysis of the pressure curve
- Automatic calculation of the target superheat (in conjunction with the appropriate measuring instrument, e.g. Testo Smart Probe)
- Measure vacuum: Graphic progression display of the measurement with indication of the start and differential value
- Evacuation: Graphic progression display of the measurement with indication of the start and differential value (in conjunction with the appropriate Testo Smart Probe, e.g. testo 552i vacuum probe)

Technical Data: testo 557s - Smart digital manifold with Bluetooth and 4-way valve block
Temperature:
Measuring range: -50 to +150 °C
Accuracy: ±0,5 °C
Resolution: 0,1 °C
Probe connection: 2 x Plug-in (NTC)
Pressure measurement:
Measuring range: -1 to 60 bar
Accuracy: ±0,5 % fs
Resolution: 0,01 bar
Probe connection: 3 x 7/16" – UNF + 1 x 5/8'' – UNF
Overload rel. (high pressure): 65 bar
General technical data:
Weight: 1243 g
Dimensions: 229 x 112,5 x 71 mm (LxWxH)
Operating temperature: -20 to +50 °C
Protection class: IP54
Product colour: Black
Auto-off: 10 min (*when not connected via Bluetooth)
Battery type: 4 x type AA batteries
Battery life: 250 h with no illumination, no Bluetooth®h (without illumination, without Bluetooth®, without vacuum probe); 100 h with illumination and Bluetooth®
Radio range: 150 m
Pressure media: CFC
Refrigerants in instrument: R1234yf; R744 (CO₂); R437A; R503; R452A; R500; R114; R444B; R407H; R422B; R434A; R410A; R290; R449A; R401B; R407F; R13; R123; R718 (H₂O); R404A; R125; R416A; R421B; R422C; R448A; R22; R407A; R409A; R12; R454B; R414B; R442A; R1233zd; R420A; R424A; R458A; R427A; R450A; R124; R502; R1234ze; R600a; R23; R402B; R455A; R454A; R407C; R453a; R513A; R401A; R422D; R402A; R507; R454C; R408A; R421A; R134a; R32; R452B; R438A
System requirements: requires iOS 7.1 or newer; requires Android 4.3 or newer; requires mobile end device with Bluetooth 4.0
requires iOS 11.0 or newer; requires Android 6.0 or newer; requires mobile end device with Bluetooth 4.0
Refrigerants update via App: R11; FX80; I12A; R1150; R1270; R13B1; R14; R142B; R152A; R161; R170; R227; R236fa; R245fa; R401C; R406A; R407B; R407D; R41; R411A; R412A; R413A; R417A; R417B; R417C; R422A; R426A; R508A; R508B; R600; RIS89; SP22
Storage temperature: -20 to +60 °C

Technical Data: testo 552i - App-controlled wireless vacuum probe
General technical data:
Weight: 142 g
Dimensions: 150 x 32 x 31 mm (LxWxH)
Operating temperature: -10 to +50 °C
Protection class: IP54
System requirements: requires iOS 8.3 or newer; requires Android 4.3 or newer; requires mobile end device with Bluetooth 4.0
Product colour: black/orange
Auto-off: 10 min (when not connected via Bluetooth)
Battery type: 3 AAA micro batteries
Battery life: 39 h
Connection: 7/16“ UNF
Interface: Bluetooth® 4.2
Storage temperature: -20 to +50 °C
Absolute Pressure:
Measuring range: 0 to 26,66 mbar / 0 to 20000 micron
Accuracy: ±10 micron + 10 % of mv (100 to 1000 micron)
Resolution: 1 micron (0 to 1000 micron) / 10 micron (1000 to 2000 micron) / 100 micron (2000 to 5000 micron)
Overload: absolute: 6,0 bar / 87 psi (relative: 5,0 bar / 72 psi)

Technical Data: testo 115i - Clamp thermometer operated via smartphone
Temperature - NTC:
Measuring range: -40 to +150 °C
Accuracy: ±1,3 °C (-20 to +85 °C)
Resolution: 0,1 °C
General technical data:
Weight: 127.4 g
Dimensions: 183 x 90 x 30 mm
Operating temperature: -20 to +50 °C
Product-/housing material: Plastic
System requirements: requires iOS 8.3 or newer; requires Android 4.3 or newer; requires mobile end device with Bluetooth 4.0
Product colour: black/orange
Battery type: 3 AAA micro batteries
Battery life: 150 h
Data transfer: Bluetooth®
Radio range: 100 m
Storage temperature: -20 to +60 °C