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  •   -73.29€Smart flush-mounted temperature and humidity sensor-controller | 0…50°C | 0-95%rH | 0-10VDC/0-20mA/PWM | Modbus RTU | 85-264VAC | IP30 | Sentera Controls | FCTH8
      -73.29€Smart flush-mounted temperature and humidity sensor-controller | 0…50°C | 0-95%rH | 0-10VDC/0-20mA/PWM | Modbus RTU | 85-264VAC | IP30 | Sentera Controls | FCTH8 1

    Smart flush-mounted temperature and humidity sensor-controller | 0…50°C | 0-95%rH | 0-10VDC/0-20mA/PWM | Modbus RTU | 85-264VAC | IP30 | Sentera Controls | FCTH8

    Code: FCTH8
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  • Product description

    Smart flush-mounted temperature and humidity sensor-controller | 0…50°C | 0-95%rH | 0-10VDC/0-20mA/PWM | Modbus RTU | 85-264VAC | IP30 | Sentera Controls | FCTH8

    FCTH8 – a Sentera Controls smart flush-mounted temperature and humidity sensor-controller: it measures temperature (0…+50 °C) and relative humidity (0–95 % rH) in the room and, using the integrated algorithm, generates one analog / modulating output (0-10 VDC, 0-20 mA or PWM) that can directly control an EC fan, an AC fan speed controller or a damper actuator. Supply – 85–264 VAC, 50–60 Hz; all parameters are accessible via Modbus RTU.

    Key idea:
    This is a transmitter and a controller in one: it needs no separate controller, because the output is calculated in the sensor itself according to the set temperature and humidity ranges. The output is determined by the higher of the two values, and either parameter can be disabled – e.g. to control by temperature only or by humidity only.
    Measurement
    0…+50 °C / 0–95 % rH
    Control output
    0-10 VDC / 0-20 mA / PWM
    Power supply
    85–264 VAC, 50–60 Hz
    Protection
    IP30, indoors only

    Operating principle

    The sensor is flush-mounted in a wall box or surface-mounted on a wall and connected directly to the mains (L, N; 85–264 VAC); control output – Ao and GND, Modbus RTU – A, /B, push-in terminals for wires up to 2.5 mm².

    Integrated sensors measure temperature and relative humidity; a range is set for each quantity within which the output varies 0–100 %, the output is determined by the higher of the two calculated values, and either quantity can be disabled. The output type is selectable – 0-10 VDC (≥ 50 kΩ), 0-20 mA (≤ 500 Ω) or 1 kHz PWM (open collector, 3.3 or 12 VDC) – and it directly controls an EC fan, an AC fan speed controller or a damper actuator; all parameters are changed over Modbus RTU, and the firmware is updated over the network.

    Result – demand-controlled ventilation without a separate controller: as humidity or temperature rises the fan speeds up, and when it falls it slows down to the minimum, while the flush-mounted enclosure with LED and light sensor suits residential and public rooms.

    Benefits FCTH8?
    Sensor and control algorithm in one – less equipment in the control panel, a simpler design and faster commissioning, while Modbus RTU allows later integration into a BMS.

    Technical specifications

    Product type Smart flush-mounted temperature and humidity sensor-controller
    Manufacturer / code Sentera Controls / FCTH8
    Series FCTH (FCTH8 / FCTHF / FCTHG)
    Measured quantities Temperature, relative humidity, ambient illuminance
    Temperature range 0…+50 °C
    Humidity range 0–95 % rH, non-condensing
    Accuracy ±0.4 °C (0…+50 °C); ±3 % rH
    Control logic Output based on the higher of the T and rH values; each parameter can be disabled
    Analog output 1 × 0-10 VDC (RL ≥ 50 kΩ) / 0-20 mA (RL ≤ 500 Ω) / PWM 1 kHz, open collector, 3.3 or 12 VDC
    Communication Modbus RTU (RS485), A, /B; firmware update via Modbus RTU
    Supply voltage 85–264 VAC, 50–60 Hz
    Max. current (Imax) 20 mA
    Indication Red / yellow / green LED, ambient light sensor
    Installation Flush-mounted or surface-mounted
    Protection class IP30 (EN 60529), indoor use only
    Weight 0.20 kg (net)
    Compliance LVD 2014/35/EU, EMC 2014/30/EU, WEEE 2012/19/EU, RoHS 2011/65/EU

    Manufacturer documentation

    ✔ Recommended by Elektrotechnikos sprendimai

    Original manufacturer documentation – technical data, wiring diagrams and installation instructions.

    Main functions

    • Integrated control algorithm – the output is generated according to the set T and rH ranges, without a separate controller.
    • Parameters that can be disabled – can be controlled by temperature only or humidity only.
    • Direct control – An EC fan, AC speed controller or damper actuator is connected directly to the output.
    • Modbus RTU – all parameters and measurements are accessible remotely; Modbus timeout (HR8) monitoring.
    • Firmware update – over the Modbus RTU network.
    • LED indication – red – value out of range or sensor fault, yellow – danger zone or Modbus connection lost, green – normal.
    • Light sensor – adjustable “active” and “standby” illumination levels – e.g. for quieter operation at night.
    • Configuration – Configuration and monitoring – the free Sentera 3SModbus software (via the CNVT-USB-RS485 converter) or the Sensistant Modbus configurator.

    Where is it used?

    • Apartments and houses – bathrooms, kitchens, living rooms
    • Hotel rooms
    • Offices and meeting rooms
    • Decentralized ventilation with EC fans
    • Buildings being renovated with flush-mounting boxes
    • Apartments without a 24 V supply, where 230 V is brought to the box
    • Small commercial premises with a single EC fan

    On-demand operation

    For the electrician of residential electrical installations.
    The sensor-controller is powered directly from the 230 V mains, so no 24 V power supply is needed.
    For the apartment renovation contractor.
    The flush-mounted enclosure installs into an existing wall box that already has 230 V.
    For owners of small commercial premises.
    A single device directly controls an EC fan according to T and rH without a control panel.

    Practical application

    If in an apartment only 230 V is brought to the flush-mounted box, and the bathroom EC fan has a 0-10 VDC input, then the FCTH8 is connected directly to the mains (85–264 VAC) and controls the fan by humidity without a separate power supply.

    Application guide: how it is used in practice

    The same FCTH8 adapts to different sites – only what is connected to its output changes:

    Site What is connected Result Installer's note
    Bathroom, shower, laundry AO1 0-10 VDC → EC fan control input As humidity rises, extraction automatically increases; when it falls, it returns to the minimum Temperature can be disabled – control by rH only
    Warehouse, workshops AO1 → AC fan speed controller analog input On a hot day extraction increases with temperature Select the signal type according to the regulator input
    System with an air damper AO1 → damper actuator 0-10 VDC input The damper opens in proportion to humidity or temperature Check the actuator input resistance (≥ 50 kΩ for voltage mode)
    Building with BMS Modbus RTU → A, /B Settings and status are accessible centrally A separate address for each sensor
    Apartment without low-voltage supply L, N ← 230 VAC mains No 24 V power supply needed To be connected by a qualified electrician with the power disconnected

    How to choose a room temperature and humidity transmitter

    Installation / output / power supply Recommended model
    Wall, 3 analog outputs, 18–34 VDC, 4-wire RSTHF-3 (room transmitter, -F)
    Wall, 3 analog outputs, 18–34 VDC or 15–24 VAC, 3-wire RSTHG-3 (room transmitter, -G)
    Wall, Modbus RTU only, PoM, RJ45 RSTHM-2 (room Modbus sensor)
    Wall, Modbus RTU + wall surface temperature (dew point control), PoM RWTHM-2 (with surface temperature sensor)
    Wall, direct control with 1 output, 18–34 VDC RCTHF-2 (smart room, -F)
    Wall, direct control with 1 output, 18–34 VDC or 15–24 VAC RCTHG-2 (smart room, -G)
    Wall, direct control with 1 output, 24 VDC via RJ45 (PoM) or terminals RCTHH-2 (smart room, PoM)
    Flush-mounted / surface-mounted, 1 output, powered directly from the 230 V mains FCTH8 (85–264 VAC) ← this model
    Flush-mounted / surface-mounted, 1 output, 18–34 VDC FCTHF (-F)
    Flush-mounted / surface-mounted, 1 output, 18–34 VDC or 15–24 VAC FCTHG (-G)
    Rule: first decide where the measurement is made (duct, room, outdoors), then what you need from the transmitter: separate analog signals for a controller (transmitter, 3 outputs), data only to a BMS (Modbus / PoM version), or direct fan control with a single output (smart sensor). Finally – the supply and number of wires: -F – 24 VDC, 4-wire, separate grounds; -G – AC or DC, 3-wire, common ground; -M / -H – power over the Modbus cable (RJ45).
    When to choose another solution: for wall mounting – RCTH-2 series; when CO2 is also needed – FCMF8-R / FCMFG-R; for measurement only – RSTH-3 series.

    Pros

    • Transmitter and controller in one
    • Control by T, rH or both
    • Accuracy ±0.4 °C, ±3 % rH
    • Modbus RTU, firmware updated over the network
    • 0-10 VDC / 0-20 mA / PWM output
    • Flush-mounted or surface-mounted installation
    • Power directly from the 230 V mains

    Cons / limitations

    • One control output – for separate T and rH signals choose a transmitter (RSTH-3 / DSTH-3)
    • IP30 – dry rooms only
    • Connected to the 230 V mains – installation must be carried out by a qualified electrician

    Safety and installation notes

    • Installation and connection are to be carried out by a qualified electrician / automation specialist with the power disconnected.
    • Supply voltage – 85–264 VAC, 50–60 Hz.
    • Hazardous mains voltage is present on terminals L, N – connect only with the power disconnected and touch protection ensured.
    • Resetting the Modbus communication parameters – with a jumper on PROG pins 1 and 2 for at least 5 s.
    • For indoor use only.

    Quick selection guide

    0…+50 °C
    0–95 % rH
    0-10 VDC / 0-20 mA / PWM
    Modbus RTU
    85–264 VAC, 50–60 Hz
    IP30
    Suitable when you need:
    • to control a fan or damper according to temperature and humidity in a room without a separate controller;
    • to implement demand-controlled ventilation in damp rooms;
    • to integrate the control into a BMS later via Modbus RTU.
    Check before use:
    • the input type of the controlled device (0-10 VDC, 0-20 mA or PWM);
    • the supply: 85–264 VAC, 50–60 Hz;
    • whether separate T and rH signals are needed – then choose a transmitter.
    Important reminder: The FCTH8 generates one control signal from T and rH; it does not replace the power section of a fan speed controller.

    FAQ

    Is a separate controller required?
    No, the algorithm is built in, and the output connects directly to an EC fan, AC speed controller or damper.
    Can it be controlled by humidity only?
    Yes, the temperature (or humidity) parameter can be switched off via Modbus RTU.
    How are the settings changed?
    Via Modbus RTU – the 3SModbus software with a CNVT-USB-RS485 converter, or via BMS.
    How do I reset the Modbus settings?
    With a jumper on PROG contacts 1 and 2 for at least 5 seconds.
    Is a 24 V power supply unit required?
    No, the FCTH8 is powered directly from 85–264 VAC.
    What conductor cross-section can be connected?
    The push-in terminals are for wires up to 2.5 mm².

    Smart flush-mounted temperature and humidity sensor-controller | 0…50°C | 0-95%rH | 0-10VDC/0-20mA/PWM | Modbus RTU | 85-264VAC | IP30 | Sentera Controls | FCTH8

    Sentera FCTH8 – smart flush-mounted temperature and humidity sensor-controller: 0…+50 °C, 0–95 % rH, 0-10 VDC / 0-20 mA / PWM control output, 85–264 VAC, 50–60 Hz supply, IP30. Humidity- and temperature-based ventilation without a separate controller.

    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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