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  • New item   Digital room temperature and humidity sensor with LCD | 0–10 V DC / 4–20 mA

    Digital room temperature and humidity sensor with LCD | 0–10 V DC / 4–20 mA

    Code: SKU#165278105692120591
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    Digital room sensor that measures air temperature and relative humidity in a room, shows them on an LCD and sends them to a controller as a 0–10 V DC / 4–20 mA signal.

  • Product description

    Digital room temperature and humidity sensor with LCD | 0–10 V DC / 4–20 mA

    This digital room sensor measures air temperature and relative humidity in a room and shows the values on an LCD display. According to the supplier, the outputs are 0–10 V DC / 4–20 mA, suitable for ventilation controllers and PLC. The manufacturer is not confirmed, so please confirm the exact parameters before ordering.

    Key point:
    A room sensor is mounted on the wall and measures the air where people are. The LCD lets you check readings without a multimeter, and the analogue signal goes straight to the controller.
    Mounting
    Wall
    Display
    LCD
    Output
    0–10 V DC / 4–20 mA
    Measures
    T and RH

    Communication interfaces and integration

    0–10 V DC Voltage signal for ventilation and HVAC controllers.
    4–20 mA Current signal for longer lines and PLC inputs.

    Operating principle

    The sensor is fixed to an interior wall, away from heat sources. Power and the output to the controller are connected.

    The sensor measures temperature and relative humidity, shows them on the LCD and converts them into an analogue signal.

    Based on the signal, the controller changes fan speed or switches a humidifier or dehumidifier.

    Why choose a room sensor with LCD?
    Analogue signal and LCD in one housing: the controller gets a standard signal, and the installer sees immediately what the sensor measures. This speeds up commissioning and troubleshooting.

    Technical specifications

    Product type Room temperature and humidity sensor with LCD
    Manufacturer / model not confirmed
    Mounting on a wall
    Measured values temperature and relative humidity
    Display LCD
    Outputs 0–10 V DC / 4–20 mA (per supplier data)
    Humidity value stated by supplier 20–80 % RH (likely the accuracy range, not the measuring range)
    Temperature value stated by supplier +5…+60 °C (per supplier data)

    Key functions

    • LCD display – readings visible on site
    • Analogue output – 0–10 V DC / 4–20 mA for standard controllers
    • Two values – temperature and relative humidity in one device
    • Wall housing – room installation without duct work
    • Simple wiring – fits existing analogue controller inputs

    How does it differ from similar products?

    Sentera RSTHF-3 (22723) Room transmitter with a confirmed specification – choose it when a documented project is required.
    Room RH sensor with Modbus RTU (3481) No display, but with RS485 Modbus RTU and 0–5 / 0–10 V output.
    SONOFF SNZB-02DR2 (18621) Wireless Zigbee with LCD for monitoring on a phone; this sensor gives a wired signal to a controller.

    Where is it used?

    • Offices and meeting rooms
    • Schools and kindergartens
    • Homes with heat recovery ventilation
    • Warehouses and archives
    • Greenhouses and grow rooms
    • Plant rooms

    Use by need

    For beginners.
    Before wiring, match the output type to the controller input: 0–10 V or 4–20 mA.
    For experienced installers.
    Mount on an interior wall, away from doors, windows, radiators and direct sun.
    For engineers / designers.
    For a BMS with documented parameters or Modbus, choose Sentera RSTHF-3 or RSTHM-2.

    Practical application

    Situation: an office meeting room is stuffy in summer, while ventilation runs at a fixed rate. Solution: a room sensor with LCD is mounted on the wall and connected to the 0–10 V input of the ventilation controller. Result: the controller increases airflow only when humidity and temperature rise, and staff see the values on the display.

    Pros / advantages

    • LCD display – readings on site
    • Analogue output 0–10 V DC / 4–20 mA
    • Temperature and humidity in one device
    • Wall mounting without duct work
    • Simple connection to existing controllers

    Cons / limitations

    • Manufacturer and full specification not confirmed
    • No Modbus – for digital integration choose Sentera RSTHM-2 (22725)
    • Meaning of the 20–80 % RH value in the name is unclear

    Safety and installation notes

    • ⚡ Make connections with the power switched off.
    • ⚡ Check supply voltage and terminal marking against the device label before wiring.
    • Route signal cables separately from power cables; use shielded cable for long lines.
    • Do not mount near radiators, doors, windows or in direct sun – readings will be distorted.

    Quick selection guide

    Wall
    LCD
    0–10 V / 4–20 mA
    T + RH
    Suitable when you need:
    • an analogue T and RH signal for a controller
    • readings on an LCD
    • wall mounting in a room
    • simple wiring without Modbus
    Check before choosing:
    • supply voltage on the device label
    • whether the controller accepts 0–10 V or 4–20 mA
    • what the supplier's 20–80 % RH and +5…+60 °C values mean
    • a mounting spot away from heat sources
    Important reminder: This is a measuring sensor, not a controller: it has no relay output and does not control a humidifier or fan by itself. For a project with a confirmed specification, choose a documented Sentera or LEFOO model.
    ☝ Elsprendimai.eu recommends:

    FAQ

    What does 20–80 % RH in the name mean?
    The supplier does not state its purpose. Usually such a value marks the range where the stated accuracy applies, not the measuring limits.
    Which output to choose – 0–10 V or 4–20 mA?
    0–10 V is simpler for short lines to the controller. 4–20 mA is more resistant to interference and suits longer lines and PLC.
    Can the sensor switch a humidifier by itself?
    No. It sends an analogue signal and the controller makes the decision. Direct control requires a hygrostat with a relay.
    At what height should it be mounted?
    Usually about 1.5 m above the floor on an interior wall, away from radiators, doors and windows.
    What is the LCD for?
    During commissioning and service you see what the sensor measures and can compare it with the controller without a multimeter.
    Is there a Modbus version?
    Modbus is not stated for this sensor. For digital integration choose Sentera RSTHM-2 with Modbus RTU.

    Sources: supplier product name and photo; manufacturer datasheet not found. Checked 2026-10-19.

    Room T/RH sensor with LCD, 0–10 V / 4–20 mA

    Digital room temperature and humidity sensor with LCD display and 0–10 V DC / 4–20 mA output for ventilation controllers. Suitable for offices, schools, homes with heat recovery and plant rooms.

    Illustrative image may have been created using AI. The appearance of the product may differ slightly from the image shown. Please refer to the technical specification.

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