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    CO,CO₂,light and sound

    70 Products
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    testo 425 - Digital hot wire anemometer with App connection
    Simple, fast and precise flow and temperature measurement plus volume flow calculation in the ventilation duct
    More flexibility for duct measurements with the cable-connected telescopic probe (maximum length 820 mm)
    Order no.0563 0425
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    testo 535 - Digital CO2 measuring instrument with App connection
    Simple, fast and precise measurement of CO₂ concentration
    Audible alarm sounds if a limit value is exceeded
    Order no.0563 0535
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    testo 545 - Digital Lux meter with App connection
    Simple, fast and precise measurement of illuminance (Lux) according to the V-lambda curve for all common light sources
    Wide range of applications due to LED compatibility (except single-colour blue LED)
    Order no.0563 1545
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    testo 540 - Light meter
    For quick ‘n easy measurements in the workplace
    Sensor is modelled on the spectral sensitivity of the human eye
    Order no.0560 0540
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    testo 405i - thermal anemometer with smartphone operation
    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
    Order no.0560 1405
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    testo Smart Probes HVAC/R Ultimate kit
    For all measurements involving heating, air-conditioning, refrigeration and ventilation systems
    All Smart Probes for temperature, pressure, humidity and flow in one kit
    Order no.0563 0002 32
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    testo Smart Probes VAC kit
    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
    Order no.0563 0003 10
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    testo 400 - Universal IAQ instrument
    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
    Order no.0560 0400
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    testo 440 laboratory kit
    Intuitive: Structured measurement menu for long-term measurements
    Precise: Laboratory probe with Pt100 sensor for accurate measurement results
    Order no.0563 4412
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    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
    Convenient: integrated telescope that can be extended to 0.85 m, with scaling, makes it easy to carry out measurements
    Order no.0563 4400
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    testo 440 16 mm Vane Kit
    Intuitive: clearly structured measurement menu for volume flow and determination of air velocity in ventilation ducts
    Convenient: integrated telescope that can be extended to 0.85 m, with scaling, makes it easy to carry out measurements
    Order no.0563 4401
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    testo 440 Lux Kit
    Intuitive: clearly structured measurement menu for long-term measurement and determination of illuminance according to the V-lambda curve , thus for all common light sources
    Precise: standard-compliant accuracy according to DIN EN 13032-1 and class C according to DIN 5032-7
    Order no.0563 4402