Thermal

Measure multiple parameters Temperature, Humidity, Pressure Turbulence, Heat radiation, Co2 Lux, PMV/PPD, WBGT 

Professional software for reporting & data logging 

Highly accurate digital probes 

Intelligent calibration concept

Measures Multiple Parameters
C, RH, Co2, Co, Pressure, Draught,
Air velocity, Volumetric Flow, Turbulance,
U Value, Lux 

Illuminated Display 

Large Range of Probes 

Large display 

Includes pressure difference sensor for pitot static tube measurements or filter monitoring

Further sensors optionally available (eg. anemometer, moisture sensors, lux and degree of turbulence sensors) for a variety of different measuring applications

Super-size memory for up to 10 000 measurements

PC software for analyzing and logging measuring data

3 in 1 Measurements Temperature, air flow & volumetric flow calcualtion 

Extendable telescopic probe 

Single & multi-point averaging 

Hold button to freeze readings 

Multi-function climate measuring instrument: measure up to 6 measurement parameters at the same time

Internal reading memory for up to 3,000 readings

Automatic allocation of the duct cross-section to the measuring location (max. 99 measuring locations)

Automatic mean value calculation and determination of the volume flow

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 Tools App (e.g. easy viewing of readings, measurement data trend, log function) 

Measures Multiple Parameters
Temperature, Humidity, CO2, Pressure 

Illuminated Display 

Large Range of Probes 

Large display 

Includes differential pressure measurement for filter monitoring or for measurement with a Pitot tube

Further optional probes can be attached: thermal and vane anemometers, along with probes for air humidity, CO₂, absolute pressure and temperature

Display of dew point distance, min., max. and mean values

Illuminated display

3 in 1 Air temperature, air velocity
& volumetric Air flow 

Telescopic handle to 300 mm 

Illuminated display

Volume flow calculation up to 99,990 m3/h 

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

Smart, intuitive measurement programs including HVAC grid measurement as per EN ISO 12599 and ASHRAE 111, PMV/PPD and turbulence as per EN ISO 7730 and ASHRAE 55

High-precision, location-independent and integrated differential pressure sensor

Measure all IAQ-related parameters – with our wide range of probes for all IAQ measurements

Document measuring values directly on the customer's site and send them by e-mail, or further analyze them using the testo DataControl PC software

Intuitive: clearly structured measurement menu for volume flow and parallel determination of air velocity, volume flow and air temperature in ventilation ducts

Convenient: integrated telescope that can be extended to 0.85 m, with scaling, makes it easy to carry out measurements

Reliable: absolute pressure compensation, internal data storage and USB port for data export

As multifaceted as your challenges themselves: the air velocity and IAQ measuring instrument can be expanded with a large portfolio of digital probes

Intuitive: Clearly structured measurement menus for volume flow and parallel determination of air velocity, humidity, and temperature in ventilation ducts, or at ventilation outlets

Smart: Hot wire probe (0.85 m) with telescope (2.8') – combine the Bluetooth vane probe (Ø 100 mm") with the telescope for ceiling outlets, or the funnel set for plate outlets (sold separately)

Convenient: Wireless probes, internal memory for data storage, and USB port for data export

Versatile: Your testo 440 setup can be expanded with a large selection of digital probes

Intuitive: clearly structured measurement menu for long-term measurement and parallel determination of CO₂ concentration, humidity, air temperature and degree of turbulence in workplaces

Precise: calculation of wet bulb temperature, dew point and absolute humidity – determination of the degree of turbulence and draught risk according to EN ISO 7730 / ASHRAE 55

Convenient: wireless probe, internal data storage and USB port for data export

As multifaceted as your challenges themselves: the air velocity and IAQ measuring instrument can be expanded with a large portfolio of digital probes

Intuitive: clearly structured measurement menu for volume flow and parallel determination of air velocity, differential pressure, humidity and temperature in ventilation ducts or at ventilation outlets​

Smart: simply combine the universal Bluetooth handle with the 100 mm vane or hot wire probe head and the extendable telescope (1.0 m)​

Convenient: wireless probes, internal data storage and USB port for data export

Versatile: the testo 440 has an integrated differential pressure sensor and can be expanded with a large portfolio of digital probes

Intuitive: clearly structured measurement menus for volume flow, degree of turbulence, cooling/heating output, mould detection and long-term measurement, such as CO₂

Wireless: Bluetooth® probes for extra convenience when measuring and less cable clutter in the measuring case (please order probes separately)

Clear overview: large graphic display with parallel display of 3 readings

Safe and reliable: internal data storage and USB port for data export

Intuitive: clearly structured measurement menus for volume flow, K-factor, degree of turbulence, cooling/heating output, mould detection and long-term measurement, such as CO₂

Wireless: Bluetooth® probes for extra convenience when measuring and less cable clutter in the measuring case (please order probes separately)

Clear and reliable: large graphic display with parallel display of 3 readings as well as internal data storage and USB port for data export

Includes a differential pressure sensor: for Pitot tube measurement and monitoring filters

Very small probe head diameter (7.5 mm) – ideal for measurements in inaccessible places

Integrated temperature measurement up to +70 °C

With telescope (can be extended to 820 mm)

Flow measuring range: 0 to +20 m/s

3 functions in 1 probe: measurement of flow, temperature and humidity

Probe head diameter: 12 mm – also suitable for measurements in ventilation ducts

With telescope (can be extended to 745 mm)

Flow measuring range: 0 to +20 m/s

4 functions in 1 probe: measurement of flow, temperature, humidity and absolute pressure

With robust, non-rotatable telescope (can be extended to 1100 mm)

Intelligent calibration concept

Flow measuring range: 0 to +20 m/s