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    testo 425 - Thermal anemometer with flow probe

    0560 4251
  1. Temperature and flow measurement as well as volumetric flow calculation
  2. Permanently attached extendible telescopic probe – maximum length 820 mm, diameter 7.5 mm
  3. With single and multi-point averaging
  4. Hold function, display of min/max value, Auto-off function
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    In order to establish whether an air conditioning or ventilation system is functioning properly, among other things you need to check the flow speed or the volumetric flow in the ventilation duct. If the air flow velocity is too low, the room loads are not correctly discharged and optimum room air quality can no longer be guaranteed.

    testo 425 thermal anemometer for quick, easy flow measurement

    The testo 425 thermal anemometer enables quick spot measurements in ventilation ducts. It records the flow speed, calculates the volumetric flow and also measures the temperature. With a measuring range of 0 to +20 m/s, the anemometer is particularly well suited to low air flow velocity.

    The thermal anemometer features a telescopic flow probe. The telescope can be extended to a length of up to 820 mm and has a probe head diameter of 7.5 mm.

    As well as flow speed, would you also like to detect the volumetric flow on your air conditioning or ventilation system? This is no problem for the testo 425 thermal anemometer. When you input the duct surface area, it automatically calculates the volumetric flow during the flow measurement. Single and multi-point averaging provides an indicator of the average volumetric flow, flow speed and temperature reading.

    You can read off the current readings and the min/max and calculated mean value at any time on the illuminated display. Using the Hold button, you can freeze the current reading in order to compare it with another value, for example. If you should ever forget to switch off the anemometer, the Auto-off function will take care of this for you. This conserves your batteries and ensures that your thermal anemometer is ready for use in the next measurement.

    Equip yourself with accessories for the anemometer

    To make sure that you are well-prepared for any circumstances, we recommend that when purchasing the anemometer, you also order our practical accessories: as an added option we offer a handy pocket, a transport case and also the TopSafe protective cover (to protect the anemometer from water, dirt and impacts).

    testo 425 thermal anemometer with permanently attached flow probe including temperature measurement and telescope (max. 820 mm), calibration protocol and battery.

    Kupci, ki so si ogledali ta izdelek, so ogledali tudi

  5. Kupci, ki so si ogledali ta izdelek, so ogledali tudi
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    0563 0003 10
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    testo 405 - Thermal anemometer
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    0560 4053
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    testo 440 Air Flow ComboKit 1 with Bluetooth®t 1 with Bluetooth
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    • Intuitive: clearly structured measurement menu for volume flow and parallel determination of air velocity, humidity and temperature in ventilation ducts or at ventilation outlets
    • Clever: hot wire probe with telescope (0.85 m) – combine the vane probe (Ø 100 mm) with Bluetooth with the telescope for ceiling outlets or the funnel set for plate outlets (please order separately) as required
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    0563 4406
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    testo 440 Hot Wire Kit
    testo 440 Hot Wire Kit
    • Intuitive: clearly structured measurement menu for volume flow and parallel determination of air velocity, volume flow and air temperature in ventilation ducts
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    :
    0563 4400
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    testo 440 Delta P Air Flow ComboKit 1 with Bluetooth®
    testo 440 delta P Air Flow ComboKit 1 with Bluetooth®
    • 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
    • Space-saving: simply combine the universal Bluetooth handle with the 100 mm vane or hot wire probe head and the extendable telescope (1.0 m)
    :
    0563 4409
  13. Kupci, ki so si ogledali ta izdelek, so ogledali tudi
    testo 400 air flow kit with hot wire probe
    testo 400 air flow kit with hot wire probe
    • Standard-compliant determination of the volume flow in ducts using grid measurements as per EN ISO 12599 and ASHRAE 111
    • Determination of the volume flow at outlets by measuring the reference pressure and entering the manufacturer-specific K-factor
    :
    0563 0400 71

    14. Temperature - NTC

    Measuring range
    −20 to +70 °C
    Accuracy
    ±0,5 °C (0 to +60 °C)
    ±0,7 °C (Remaining Range)
    Resolution
    0,1 °C

    Velocity -Thermal anemometer

    Measuring range
    0 to +20 m/s
    Accuracy
    ±(0,03 m/s + 5 % of mv)
    Resolution
    0,01 m/s

    General technical data

    Weight
    285 g
    Dimensions
    182 x 64 x 40 mm
    Operating temperature
    −20 to +50 °C
    Product-/housing material
    ABS
    Battery type
    9V block battery, 6F22
    Battery life
    20 h
    Storage temperature
    −40 to +70 °C