Thermal

The functional testing of ventilation and air conditioning systems includes monitoring the flow speed in ventilation ducts. If the air flow velocity and volumetric flow are not set correctly, the room air quality may suffer. The testo 425 thermal anemometer measures the flow speed and automatically calculates the volumetric flow.

• Temperature and flow measurement as well as volumetric flow calculation

• Permanently attached extendible telescopic probe – maximum length 820 mm, diameter 7.5 mm

• With single and multi-point averaging

• Hold function, display of min/max value, Auto-off 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:

• 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 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.

• 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

Use the testo 405 thermal anemometer to measure air velocity, volumetric flow and air temperature. It is suitable for carrying out quick check measurements in ventilation ducts and for measuring the air velocity in rooms, e.g. at draughty windows.

• Measurement of air velocity, volumetric flow and air temperature

• For measurements in ventilation ducts and in rooms

• Particularly precise in the range between 0 and 2 m/s

• Telescope extendible to 300 mm

Air flow measurements in ducts, temperature measurements in laboratories, humidity measurements in production, pressure difference measurements in clean rooms. The testo 480 digital temperature, humidity and air flow meter comes with a wide range of optional sensors that allow you to measure, analyse and log these and a variety of other parameters with only one device.

• High-quality optional sensors for measuring air flow, temperature, humidity, pressure, degree of turbulence, heat radiation, CO2, illumination intensity, PMV/PPD and WBGT

• High-precision, integrated pressure sensor included

• Pro-software for easy and efficient analysis and logging included

• Intelligent calibration concept

The testo 435-4 multifunction indoor air quality meter allows you to carry out all the measurements you need to inspect and adjust ventilation and air conditioning systems and to check the quality of the indoor air. There is also an integrated pressure difference sensor for pitot static tube measurements and filter monitoring and a wide range of optionally available sensors and probes to choose from.

• 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

The testo 435-2 indoor air quality meter allows you to carry out all the measurements that are necessary to check and adjust ventilation and air conditioning systems and assess the quality of the indoor air. Select from a wide range of probes and sensors. Because it’s you know best what your meter needs to be able to do!

• Comprehensive range of measuring functions using optionally available accessories – e.g. anemometers, moisture sensors, lux and degree of turbulence sensors

• Super-size memory for up to 10 000 readings

• Displays dew point difference, min, max and mean values

• PC software for analyzing and logging measuring data

You can keep a close eye on indoor air quality with the testo 445 climate measuring instrument: the allrounder can measure up to 6 parameters (with the appropriate probe), which can help you make a professional assessment of indoor air quality. The climate measuring instrument therefore supports you in adjusting and checking ventilation and air conditioning systems.

• 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

testo 435 is a series of multi-function climate measuring instruments made by Testo. The testo 435-1 version is the entry-level measuring instrument in this series. You can use this to carry out measurements which you need to adjust ventilation and air conditioning systems and assess air quality. For this we offer you a comprehensive range of optional probes and sensors to choose from.

• You have the option of connecting thermal anemometers and vane anemometers for measuring air velocity and volumetric flow in ventilation ducts

• Air quality: measurement of CO₂, air humidity, air temperature and absolute pressure with the optional IAQ probe

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

• Illuminated display

testo 435-3 – multi-function climate measuring instrument with integrated differential pressure measurement. You can use this to carry out measurements which you need to adjust ventilation and air conditioning systems and assess room air quality. For this we offer a comprehensive range of optional probes and sensors to choose from.

• 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

The hot wire probe (in conjunction with the appropriate measuring instrument) is ideal for determining flow velocity, volume flow and temperature in ventilation ducts or at ventilation outlets.

• 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

The hot wire probe (in conjunction with the appropriate measuring instrument) is ideal for determining flow velocity as well as temperature and humidity in ventilation ducts or at ventilation outlets.

• 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

The hot wire probe (in conjunction with the appropriate measuring instrument) is ideal for determining flow velocity as well as temperature, humidity and pressure in ventilation ducts or at wall or ceiling outlets.

• 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

The comfort probe (with the appropriate measuring instrument) is ideally suited for determining indoor air turbulence in accordance with EN 13779.

• Turbulence measurement in accordance with EN 13779

• Determination of air velocity and draught risk

• Integrated temperature and ambient pressure measurement

• Intelligent calibration concept

The hot ball probe (in conjunction with the appropriate measuring instrument) is ideal for determining flow velocity and temperature.

• Non-directional flow measurement with unknown flow direction

• Integrated temperature measurement and absolute pressure compensation for accurate measurement results

• Intelligent calibration concept 

• Flow measuring range: 0 to +10 m/s 

The hot ball probe (in conjunction with the appropriate measuring instrument) is ideal for determining flow velocity and temperature in ventilation ducts or at air outlets.

• Non-directional flow measurement 

• Integrated temperature measurement

• Robust (no moving/rotating element, no wear and tear) 

• Flow measuring range: 0 to +10 m/s
  
   

The hot wire probe (in conjunction with the appropriate measuring instrument) is ideal for determining flow velocity and temperature in ventilation ducts or at plate outlets and ventilation grilles.

• Integrated temperature measurement and absolute pressure compensation for accurate measurement results

• Probe head diameter: 7.5 mm – ideal for ventilation ducts with small holes

• Intelligent calibration concept 

• Flow measuring range: 0 to +20 m/s 

The fast-action hot wire probe (in conjunction with the appropriate measuring instrument) is ideal for determining flow velocity in ventilation ducts or at ceiling and wall outlets.

• Flow measurement with direction recognition – ideal for an unknown flow axis

• Probe head diameter: 10 mm

•  

• Measuring range: 0 to +20 m/s 

The comfort probe (with the appropriate measuring instrument) is ideally suited for determining indoor air turbulence in accordance with EN 13779.

• Turbulence measurement in accordance with EN 13779

• Non-directional flow measurement

• High level of accuracy even at low flow velocities

• Integrated temperature measurement

The hot wire probe (in conjunction with the appropriate measuring instrument) is ideal for determining flow velocity and temperature in laboratory fume cupboards with ultimate precision.

• Integrated temperature measurement and absolute pressure compensation for accurate measurement results

• Maximum precision for measuring flow in laboratory fume cupboards according to DIN EN 14175-3/-4

• Intelligent calibration concept

• Flow measuring range: 0 to +5 m/s