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    Temperature Humidity Sensor with Alarm, RS485

    SKU: SUCH-TH-ALARM
    $139.99
    ● Output signal RS485 ● Communication protocol MODBUS RTU ● Measuring range of temperature: -40~80℃, humidity: 0~99.9% ● Supply voltage DC 9-36V/USB: 5V
    🚚 Free shipping
    🕒 Delivery date: 6-12 days
    🔁 30-day Returns
    Overview

    Temperature humidity sensor with alarm, is an advanced digital transmitter designed for precise environmental monitoring. It features a high-accuracy temperature and humidity sensor with strong anti-interference and long-term stability. Supporting RS485 output with the MODBUS RTU protocol, it ensures reliable data communication over distances up to 1000 meters. SUCH temp and humidity sensor includes a built-in alarm function for high and low temperature or humidity alerts and a high-definition TFT color display for real-time data visualization. With a wide measuring range of -40~80°C and 0~99.9% RH, powered by DC 9-36V or USB 5V, this humidity sensor is ideal for industrial sites, HVAC systems, smart buildings, laboratories, and other environmental monitoring applications.

    Feature

    • High Measurement Accuracy: Alarm temperature humidity sensor equipped with a high-quality digital temperature and humidity sensor, it ensures precise readings, excellent anti-interference capability, and long-term stability for consistent performance.
    • Built-in Alarm Function: Features an internal alarm module that provides high and low temperature or humidity alerts, allowing users to monitor environmental changes in real time.
    • RS485 Communication Output: Supports RS485 signal transmission with the standard MODBUS RTU protocol, ensuring reliable and flexible data communication.
    • Long-Distance Transmission: Designed for stable signal transmission over distances up to 1000 meters, suitable for large-scale industrial monitoring systems.
    • High-Definition TFT Display: The bright TFT color screen provides clear and intuitive visualization of temperature and humidity readings.
    • Multi-Device Networking: Supports networking of up to 254 devices, enabling integration into multi-point temperature and humidity monitoring systems.
    • Wide Application Range: Ideal for industrial workshops, power rooms, communication rooms, HVAC systems, intelligent buildings, museums, archives, and offices, offering a complete environmental monitoring solution.

    Detail

    Room temperature humidity sensor detail

    No. Description No. Description
    1 Menu key / Back key 2 Confirm key
    3 Up / + 4 Down button / -
    5 Display part 6 Back cover lock
    7 USB power supply and connection 8 Wiring part
    9~11 Screw hole 12 Plastic buckle
    13~16 Cable position / /


    Wiring

    Room temperature humidity sensor wiring

     

     

    Specs
    Weight 47.2g
    Dimension (L*W*H) 100*84*21mm
    Output signal RS485
    Communication protocol MODBUS RTU
    Supply voltage DC 9-36V/USB: 5V
    Measuring range of relative humidity 0~99.9%RH
    Measuring range of temperature -40~+80℃
    Accuracy of humidity ±2%RH
    Accuracy of temperature ±0.3℃
    Resolution 0.1℃/0.1%RH
    Long-term stability <0.5%RH/year, <0.1℃/year
    Current consumption <50mA (5V)
    Sampling period 2s
    Maximum communication distance 1000m
    Alarm modes High humidity, low humidity, high temperature, low temperature
    Housing material Engineering plastics
    Working environment Temperature: -40~80℃, humidity: 0~99.9% no condensation
    Storage environment Temperature: 0~60℃, humidity: <90%RH
    Wiring White: RS485 B-, black: GND, red: V+, yellow: RS485 A+
    Application
    Duct humidity sensor hvac systems

    HVAC Systems

    Indoor environment monitoring

    Indoor Environment Monitoring

    Laboratory climate control cabinet

    Laboratory Climate Control Cabinet

    FAQ

    Yes, it is designed for 24/7 continuous operation in monitoring systems, providing stable and reliable long-term performance.

    Keep the housing clean and free from dust. Avoid using solvents or water; instead, wipe gently with a dry or slightly damp cloth. For long-term stability, ensure the sensor is protected from direct exposure to condensation or corrosive gases.

    Each unit is factory-calibrated before shipment. However, periodic calibration is recommended for high-precision applications or environments with extreme temperature and humidity variations.

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