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  • EXTECH Temperature and Humidity Meters

    Constant innovation, unique features and affordibility defines Extech testing and measuring instruments. With interest in 15 major product categories, we carry a large range of multimeters, clamp meters, indoor air quality , environmental meters for sounds, temperatue, humudity, airflow, water quality etc. Find the right Extech instrument to suit your testing and diagnostic applications including Maintenance, Environmental, HVACR, Electrical and Construction.


    EXTECH 401014 - Big Digit Indoor/Outdoor Thermometer
      EXTECH - Big Digit Indoor/Outdoor Thermometer Model # 401014

    • Simultaneously displays indoor and outdoor temperatures
    • Big digit display can be easily seen from a distance
    • Includes wall bracket and 3 metre extension cable with waterproof outdoor sensor
    EXTECH RHT50 - Weather Datalogger
      EXTECH - Weather Datalogger Model # RHT50

    • Datalogs up to 10,000 readings with a user programmable sample rate
    • Selectable Atmospheric Pressure Units: psi, hPa, kPa, and bar
    • Selectable data sampling rate from 1 minute to 18 hours
    EXTECH 445580 - Humidity/Temperature Pen
      EXTECH - Humidity/Temperature Pen Model # 445580

    • Simultaneous display of Temperature (°C/°F) and Relative Humidity
    • Max/Min and Data Hold
    • Built-in self calibration utility allows for field calibrations using optional Relative Humidity calibration bottles
    EXTECH HT30 - Heat Stress WBGT (Wet Bulb Globe Temp.) Meter
      EXTECH - Heat Stress WBGT (Wet Bulb Globe Temp.) Meter Model # HT30

    • Heat Stress Index measures how hot it feels when humidity is combined with temperature, air movement, and radiant heat
    • Black Globe Temperature (TG) monitors the effects of direct solarradiation on an exposed surface
    • In/Out Function displays the WBGT value with or without direct sun exposure
    EXTECH RH200W - Multi-Channel Wireless Hygro-Thermometer
      EXTECH - Multi-Channel Wireless Hygro-Thermometer Model # RH200W

    • Base Station LCD with Auto-Night Light displays local and up to eight remote Temperature/Humidity readings either auto-cycle or manual mode from the wireless transmitters
    • Easy-to-read 1.3″ (33mm) oversized digits
    • Min/Max recording with reset
    EXTECH RH390 - Precision Psychrometer
      EXTECH - Precision Psychrometer Model # RH390

    • Dual backlit display
    • Simultaneous display of: Humidity/Temperature, Humidity/Dew Point or Humidity/Wet Bulb
    • Data Hold and Min/Max functions
    EXTECH RH401 - Digital Psychrometer + InfraRed Thermometer
      EXTECH - Digital Psychrometer + InfraRed Thermometer Model # RH401

    • Triple display with backlighting
    • Displays Air temp+RH+surface temp or Dew Point+RH+surface temp or Wet Bulb+RH+surface temp
    • Built-in InfraRed Thermometer with laser pointer and 8:1 distance to target ratio
    EXTECH 445703 - Big Digit Hygro Thermometer
      EXTECH - Big Digit Hygro Thermometer Model # 445703

    • Max/Min with “reset” function
    • Humidity: 10 to 99%RH
    • Temp: 14 to 140°F or -10 to 60°C
    EXTECH 445713 - Big Digit Indoor/Outdoor Hygro-Thermometer
      EXTECH - Big Digit Indoor/Outdoor Hygro-Thermometer Model # 445713

    • Max/Min with reset function
    • Humidity: 10 to 99% RH
    • Temperature: 14 to 140°F or -10 to 60°C
    EXTECH 445713-TP - Big Digit Indoor/Outdoor Hygro-ThermometerCompact Hygro-Thermometer with Remote Probe
      EXTECH - Big Digit Indoor/Outdoor Hygro-ThermometerCompact Hygro-Thermometer with Remote Probe Model # 445713-TP

    • External temperature probe: -58 to 158°F (-50 to 70°C)
    • Internal temperature sensor: 32 to 122°F (0 to 50°C)
    • Internal humidity range: 20% to 99% RH
    EXTECH 445814 - Hygro-Thermometer Humidity Alert w/Dew Point
      EXTECH - Hygro-Thermometer Humidity Alert w/Dew Point Model # 445814

    • %RH audible and visual alarm alerts when humidity exceeds set limit
    • Displays Dew Point temperature
    • Max/Min with reset function
    EXTECH 445815 - Hygro-Thermometer Humidity Alert with Dew Point
      EXTECH - Hygro-Thermometer Humidity Alert with Dew Point Model # 445815

    • %RH audible and visual alarm alerts when humidity exceeds set limit
    • Displays Dew Point temperature
    • Max/Min with reset function
    EXTECH RH10 - Pocket Series Hygro-Thermometer
      EXTECH - Pocket Series Hygro-Thermometer Model # RH10

    • Measures relative humidity from 0 to 100%RH
    • Measures temperature from -4 to 140°F (-20 to 60°C)
    • Pocket-sized housing with easy one-button operation
    EXTECH RH35 - Desktop Hygro-Thermometer Alert
      EXTECH - Desktop Hygro-Thermometer Alert Model # RH35

    • Innovative graphical display shows the measured humidity values of the last 24 hours like a radar screen
    • Large, easy-to-read LCD displays % Relative Humidity, Indoor Temperature and Dew Point
    • Humidity range: 10 to 99%RH
    EXTECH RH300-CAL - Humidity Calibration Kit
      EXTECH - Humidity Calibration Kit Model # RH300-CAL

    • Bottles designed with small opening for snugged fit of the sensor
    • Includes 33%RH and 75%RH calibration bottles
    EXTECH RH490 - Precision Hygro-Thermometer
      EXTECH - Precision Hygro-Thermometer Model # RH490

    • Less then 30 seconds of RH response time
    • Water vapor in GPP
    • Dual backlit display
    EXTECH RH520A - Humidity+Temperature Chart Recorder with Detachable Probe
      EXTECH - Humidity+Temperature Chart Recorder with Detachable Probe Model # RH520A

    • Simultaneous numerical and graphical display of Humidity and Temperature readings, plus Time and Date
    • Measures Humidity (10 to 95%RH) and Temperature (-20.0°F to 140.0°F) plus calculates Dew Point
    • Basic accuracy 3%RH, 1.8°F/1°C
    EXTECH RH25 - Heat Index Psychrometer -4 to 122°F (-20 to 50°C)
      EXTECH - Heat Index Psychrometer -4 to 122°F (-20 to 50°C) Model # RH25

    • Built-in multiparameter sensor measures Heat Index, Wet Bulb Globe Temperature (WBGT), Humidity, Ambient Temperature, Temperature, Dew Point and Wet Bulb
    • User Programmable Heat Index/WBGT alarm
    • MIn/Max/Average
    EXTECH 44550  - Pocket Humidity- Temperature Pen
      EXTECH - Pocket Humidity- Temperature Pen Model # 44550

    • Humidity: 20 to 90%RH (±5%RH)
    • Temperature: 14 to 122°F or -10 to 50°C
    • Accuracy: ±5%RH; ±2°F, ±1°C
    EXTECH MO290 - Pinless Moisture Psychrometer + IR
      EXTECH - Pinless Moisture Psychrometer + IR Model # MO290

    • Measure Humidity, Air Temperature (with built-in probe) plus non-contact InfraRed Temperature
    • Pinless moisture sensor allows to monitor moisture in wood and other building materials with no surface damage
    • Remote pin-type probe (MO290-P) for contact moisture readings (3ft/0.9m cable length)
    EXTECH HW30 - HeatWatch™ Humidity/Temperature Stopwatch
      EXTECH - HeatWatch™ Humidity/Temperature Stopwatch Model # HW30

    • User adjustable Heat Index alarm
    • Stopwatch/chronograph mode with 1/100 second resolution
    • Fastest/Slowest/Average Lap recall

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