Air humidity meters

Continuous measurement and display of temperature and relative humidity

Calculation and display of the dew point

Large, clear display

Durable quality: capacitive humidity sensor with long-term stability for many years of measurement

Application-specific measurement menus for superheating/subcooling, target superheat, heating/cooling power

More than 90 common refrigerants plus refrigerant updates in the testo Smart Probes App

100 m Bluetooth^® range for particularly flexible applications

Transmission and analysis of measurement data via testo Smart Probes App

Measures air temperature and relative humidity

Calculates dew point and wet bulb temperature

Displays min and max values, hold function, power off mode

Integrated longlife moisture meter for long lasting quality

Measures and displays temperature and humidity

Calculates and displays the dew point

LED alarm is activated when thresholds are exceeded

Long-lasting quality: long-time stable humidity sensor guarantees years of measuring

For all measurements involving heating, air-conditioning, refrigeration and ventilation systems

All Smart Probes for temperature, pressure, humidity and flow in one kit

Display of measurement data progression as a graph or table

Transmission and analysis of measurement data via testo Smart Probes App

Measurement of air and surface temperature, humidity, air velocity and volume flow

Measurement menus for volume flow measurement in ducts and at outlets, identification of mould risk, easy image documentation including IR temperature reading and measurement spot marking

Display measurement data as a graph or table and analyze and send via testo Smart Probes App

In conjunction with your smartphone/tablet, carry out the most important measurements involved in air conditioning systems

Ram electrodes guarantee precise moisture measurements in wood and building materials

Ideal for carrying out relative humidity and air temperature measurements to check storage and drying

Identifying and preventing problems using dew point and wet bulb calculations

Easy to use; backlit display for use in all lighting conditions

Measurement of air humidity and temperature in rooms and ducts

Automatic calculation of the dew point and wet bulb temperature via testo Smart Probes App

Measurement data analyzed and sent via testo Smart Probes App

Problem-free application at measuring points that are a long distance apart thanks to Bluetooth^® range up to 100 m

Measures air temperature, relative humidity and pressure

Ideal for monitoring the ambient air especially in laboratories

Alarm alerts when threshold is exceeded

Table or wall mount

Easy temperature and humidity measurement

Calculation of dew point and wet bulb temperature

Illuminated display

Capacitive humidity sensor with long-term stability

Measures relative humidity and air temperature

Calculates the dew point

Ideal for measurements in ventilation ducts and in rooms

Measuring values easy to read off thanks to a pivoting display

Optionally available sensors for moisture, temperature, pressure dew point and absolute pressure measurements

2 plug-in sensors and 3 wireless sensors can be connected

Super-size memory for up to 10 000 readings

USB cable and PC software for archiving and logging measuring data included

Probes available as an option mean you can measure air humidity, temperature, absolute pressure and dew point in compressed air

Two plug-in probes and 3 radio probes can be attached

Calculates dew point and dew point distance

Display of min., max. and mean values

Identify mould risk at an early stage using the testo Smart Probes App

Measuring point marking with laser function

Display and evaluation of the mould risk with the aid of traffic light colours

Transmission and analysis of measurement data including photo documentation via testo Smart Probes App

Measures the temperature and humidity in the room and alerts the room’s occupants when thresholds are reached

Large, easy-to-read display: shows the current reading and provides you with an at-a-glance 90-day statistic snapshot

Long-term stable sensor – for long-term, high-quality measurements

Table and wall mount included

Measure temperature, moisture and dew point with only one device

Calculate the surface moisture content

Easy and comfortable to use: easy-to-follow menu guide, can save up to 200 readings, data analysis with free-to-download software

Four-Point-Laser and 50:1 Optics for precise measurements even over long distances

High-precision humidity measurement up to ± 1% RH

Internal reading memory (3,000 readings)

Convenient data evaluation via optional PC software

Possibility of attaching a really wide range of optional probes thanks to a large accessory portfolio

Evaluate renovation measures quickly and flawlessly

Easy probe attachment, even in inaccessible places

Proof of service thanks to report creation 

Integrated memory and easy evaluation with PC software

testo 435-2 multifunction measuring instrument for the adjustment and testing of air conditioning and ventilation systems

Several attachable probes included in the set (vane probes, temperature/humidity probes)

Additional optional probes available for a really wide range of measuring purposes

Large instrument memory for up to 10,000 readings