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  • New item   Duct humidity sensor | 0–100 % RH | 0–5 V / 0–10 V

    Duct humidity sensor | 0–100 % RH | 0–5 V / 0–10 V

    Code: SKU#165268873591752961
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    Price 84.70 € VAT incl.
    ( 70.00 € VAT excl. )
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    Duct relative humidity sensor for ventilation ducts. Measures up to 100 % RH and sends an analogue 0–5 V or 0–10 V signal to the controller.

  • Product description

    Duct humidity sensor | 0–100 % RH | 0–5 V / 0–10 V

    This duct sensor measures air relative humidity in a ventilation duct through a metal probe. According to the supplier, the measuring range reaches 100 % RH, output: 0–5 V / 0–10 V. The manufacturer is not confirmed, so please confirm the exact parameters before ordering.

    Key point:
    Humidity in the duct reflects the condition of the whole served zone, so the controller can regulate ventilation, humidification or dehumidification according to actual demand. The analogue signal connects directly to the controller input.
    Mounting
    Duct
    Measures
    Relative humidity
    Range
    up to 100 % RH
    Output
    0–5 V / 0–10 V

    Communication interfaces and integration

    0–5 V / 0–10 V Analogue humidity signal for ventilation and HVAC controllers.

    Operating principle

    The probe is inserted into a straight duct section and the housing is fixed outside. Power and the analogue output to the controller are connected.

    The sensor measures relative air humidity and converts it into a 0–5 V or 0–10 V signal.

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

    Why choose a duct humidity sensor?
    The sensor gives a simple analogue signal accepted by most ventilation controllers. This allows humidity control where Modbus is not needed.

    Technical specifications

    Product type Duct relative humidity sensor
    Manufacturer / model not confirmed
    Mounting in a duct, metal probe
    Measured value relative humidity
    Measuring range up to 100 % RH (per supplier data)
    Output 0–5 V / 0–10 V (per supplier data)

    Key functions

    • Analogue output – 0–5 V / 0–10 V for standard controllers
    • Metal duct probe – measurement in the airflow
    • Range up to 100 % RH – also suits humid extract air
    • Simple wiring – no programming or Modbus settings
    • Duct mounting – housing outside, service without opening the duct

    How does it differ from similar products?

    Sentera DSTHF-3 (22713) Duct T/RH transmitter with a confirmed specification and Modbus RTU – for documented projects.
    Duct T/RH sensor with LCD (5273) Also measures temperature, has an LCD and 0–10 V / 4–20 mA output.
    Room RH sensor with Modbus RTU (3481) VTS transmitter with 0–5 / 0–10 V and RS485 Modbus RTU, temperature via Modbus.

    Where is it used?

    • Extract air ducts of ventilation units
    • Heat recovery units
    • Pool and spa ventilation
    • Humidification system control
    • Warehouse and production ventilation
    • Air handling units

    Use by need

    For beginners.
    Check whether the controller accepts 0–5 V or 0–10 V and connect the matching output.
    For experienced installers.
    Insert the probe into the middle of the duct in a straight section, away from humidifiers, heaters and bends.
    For engineers / designers.
    If you need temperature, Modbus or documented parameters, choose Sentera DSTHF-3 or DCTHM-2.

    Practical application

    Situation: a pool ventilation unit controller has a free 0–10 V input, and extract air humidity varies with the number of visitors. Solution: a duct humidity sensor is installed in the extract duct. Result: the controller increases airflow only when humidity rises and saves energy at quiet times.

    Pros / advantages

    • Analogue 0–5 V / 0–10 V output
    • Metal duct probe
    • Range up to 100 % RH
    • Simple connection to existing controllers
    • Housing outside the duct – easy to service

    Cons / limitations

    • Manufacturer and full specification not confirmed
    • Temperature measurement not stated – for T and RH choose the duct T/RH sensor with LCD (5273)
    • No Modbus – for digital integration choose Sentera DCTHM-2 (22712)

    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 install the probe directly after a humidifier – droplets and mist will distort readings.

    Quick selection guide

    Duct
    RH
    up to 100 % RH
    0–5 / 0–10 V
    Suitable when you need:
    • an analogue humidity signal for a controller
    • measurement in a duct
    • humidity control without Modbus
    • simple wiring
    Check before choosing:
    • supply voltage on the device label
    • whether the controller accepts 0–5 V or 0–10 V
    • probe length versus duct diameter
    • whether temperature measurement is also needed
    Important reminder: This is a measuring sensor, not a hygrostat: it has no relay output and does not control a humidifier or fan by itself. The controller makes decisions based on its signal.
    ☝ Elsprendimai.eu recommends:

    FAQ

    Does the sensor measure temperature?
    The name states relative humidity only. If you also need temperature, choose a duct T/RH sensor.
    Which output to choose – 0–5 V or 0–10 V?
    The one your controller's analogue input accepts. Most ventilation controllers use 0–10 V.
    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.
    Where should the probe go in the duct?
    In a straight duct section, with the probe tip in the middle of the airflow, away from humidifiers, heaters and bends.
    Is there a Modbus version?
    Modbus is not stated for this sensor. The VTS room transmitter (3481) has analogue and Modbus output; for duct mounting choose Sentera DCTHM-2.
    Is it suitable for pool ventilation?
    Yes, as a humidity signal for the controller. Install the probe in the extract duct, not in the pool hall itself.

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

    Duct humidity sensor 0–5 V / 0–10 V

    Duct relative humidity sensor with a metal probe and 0–5 V / 0–10 V output for ventilation controllers. Suitable for extract ducts, heat recovery units and pool ventilation.

    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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