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    Temperature and Humidity Sensor/Transmitter, Duct Mounted

    Temperature and humidity transmitter adopts digital temperature and humidity sensor AM2305, and converts the air temperature and humidity into 4-20mA standard signal. Industrial temperature and humidity transmitter has dustproof PC housing, metal filter screen, wide measuring range, high accuracy, anti-chemical pollution, excellent long-term stability and repeatability.
    SKU: ATO-TAHT-AF1020
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    Delivery date: 6-12 days

    Temperature and humidity transmitter adopts digital temperature and humidity sensor AM2305, and mounts in duct without air leakage.

    Application: Temperature and humidity transmitter is widely used in meteorology, tobacco, chemicals, medical and health, food industry and other occasions that need air temperature and humidity measurement and control.

    Model ATO-TAHT-AF1020
    Weight 130g
    Dimension (L*W*H) 297*70*28mm
    Output signal 4-20mA
    Supply voltage DC 18-36V
    Measuring range of relative humidity 0~99.9%RH
    Measuring range of temperature -40~+80℃
    Accuracy of humidity ±3%RH
    Accuracy of temperature ±0.5℃
    Resolution 0.1℃/0.1%RH
    Long-term stability <0.5%RH/year, <0.1℃/year
    Power consumption <4mA
    Response time 8s
    Power-on time 3s
    Housing material PC
    Working environment Temperature: -40~80℃, humidity: 0~99.9% no condensation
    Storage environment Temperature: 0~60℃, humidity: <90%RH
    Product packing list 1*ATO-TAHT-AF1020 with 50cm four-core shield wire, 1*flange (duct mounted), 2*mounting screw
    Wiring Red: V+, black: GND, yellow: RH (humidity output 4-20mA), white: T (temperature output 4-20mA)

    Dimensional drawing (unit: mm):
    Temperature and humidity transmitter AF1020 dimensional drawing
    Built-in switch setting for measuring range of temperature:

    Switch 1 Switch 2 Measuring range of temperature
    OFF OFF 0~+50℃
    OFF ON -20~+80℃
    ON OFF -40~+60℃
    ON ON -40~+80℃


    Temperature and Humidity Sensor Duct Mounted Details

    Tips: Temperature drift and stability of temperature and humidity sensor/transmitter
    Almost all temperature and humidity sensors have a temperature drift. Therefore, when choosing a temperature and humidity sensor/transmitter, the range of temperature variation in the application field shall be considered, check whether the selected sensor/transmitter works normally at specified temperature and whether the temperature drift exceeds the design index. The temperature coefficient of capacitive temperature and humidity sensor is a variable that is related with operating temperature and humidity range, because the dielectric coefficient of water and high molecular polymer don't change synchronously with the temperature, and the temperature coefficient mainly depends on the dielectric coefficient of water and humidity sensitive materials. As a result, the temperature coefficient of capacitive humidity sensor is not constant. The minimum temperature coefficient of capacitive temperature and humidity sensor occurs at normal temperature and medium humidity section, the temperature drift of middle and low humidity may be ignored at 5-25℃. However, when it's used in the high temperature and high humidity, the influence of temperature drift shall be considered and necessary compensation shall be made.
    The humidity sensors of temperature and humidity transmitters are impossible to seal and are bound to contact with the vapor in the atmosphere, so its stability and service life are limited. This shall be noted and regular calibration is necessary.

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