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  • New item   -167.75€Smart flush-mounted CO2 sensor-controller | CO2 400-2000ppm | T 0…50°C | 0-95%rH | 0-10VDC/0-20mA/PWM | Modbus RTU | 24VAC/VDC | IP30 | Sentera Controls | FCMFG-R
    New item   -167.75€Smart flush-mounted CO2 sensor-controller | CO2 400-2000ppm | T 0…50°C | 0-95%rH | 0-10VDC/0-20mA/PWM | Modbus RTU | 24VAC/VDC | IP30 | Sentera Controls | FCMFG-R 1
    New item   -167.75€Smart flush-mounted CO2 sensor-controller | CO2 400-2000ppm | T 0…50°C | 0-95%rH | 0-10VDC/0-20mA/PWM | Modbus RTU | 24VAC/VDC | IP30 | Sentera Controls | FCMFG-R 2
    New item   -167.75€Smart flush-mounted CO2 sensor-controller | CO2 400-2000ppm | T 0…50°C | 0-95%rH | 0-10VDC/0-20mA/PWM | Modbus RTU | 24VAC/VDC | IP30 | Sentera Controls | FCMFG-R 3
    New item   -167.75€Smart flush-mounted CO2 sensor-controller | CO2 400-2000ppm | T 0…50°C | 0-95%rH | 0-10VDC/0-20mA/PWM | Modbus RTU | 24VAC/VDC | IP30 | Sentera Controls | FCMFG-R 4
    New item   -167.75€Smart flush-mounted CO2 sensor-controller | CO2 400-2000ppm | T 0…50°C | 0-95%rH | 0-10VDC/0-20mA/PWM | Modbus RTU | 24VAC/VDC | IP30 | Sentera Controls | FCMFG-R 5

    Smart flush-mounted CO2 sensor-controller | CO2 400-2000ppm | T 0…50°C | 0-95%rH | 0-10VDC/0-20mA/PWM | Modbus RTU | 24VAC/VDC | IP30 | Sentera Controls | FCMFG-R

    Code: FCMFG-R
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  • Product description

    Smart flush-mounted CO2 sensor-controller | CO2 400-2000ppm | T 0…50°C | 0-95%rH | 0-10VDC/0-20mA/PWM | Modbus RTU | 24VAC/VDC | IP30 | Sentera Controls | FCMFG-R

    FCMFG-R – a Sentera Controls smart flush-mounted CO2 sensor-controller that measures CO2 concentration (400–2000 ppm), temperature (0…+50 °C) and relative humidity (0–95 % rH) in the room and has one control output (0-10 VDC, 0-20 mA or PWM), which the integrated algorithm calculates from the highest of the T, rH and CO2 values. Supply – 24 VDC or 24 VAC ±10 %.

    Key idea:
    This is demand-controlled ventilation “out of the box”: the sensor itself decides how much ventilation is needed and directly controls an EC fan, an AC speed controller or a damper actuator. Any of the three measured quantities can be disabled – e.g. to control by CO2 only.
    CO2 range
    400–2000 ppm
    Output
    1 × 0-10 VDC / 0-20 mA / PWM
    Power supply
    24 VDC or 24 VAC ±10 %
    Protection
    IP30, indoors only

    Operating principle

    The device is flush-mounted in a wall box or surface-mounted on the wall; connect the 24 VDC or 24 VAC power supply (VIN, GND), the control output AO1 with its own GND, and Modbus RTU (A, /B); the terminals are push-in, for wires up to 1.5 mm².

    A replaceable and calibratable CO2 element, together with a temperature and humidity sensor, measures air quality, and all parameters are available over Modbus RTU. A range is set for each quantity, and the output (0–100 %) follows the highest of the three calculated values; the output type is 0-10 VDC (≥ 50 kΩ), 0-20 mA (≤ 500 Ω) or 1 kHz PWM (3.3 or 12 VDC), so it directly controls an EC fan, an AC fan speed controller or a damper actuator.

    Result – ventilation according to the actual number of people and air quality: in an empty room ventilation runs at a minimum, and as people gather it increases, which reduces heating / cooling losses and fan energy consumption.

    Benefits FCMFG-R?
    CO2, temperature, humidity and a control algorithm in one device – demand-controlled ventilation without a separate controller or programming.

    Technical specifications

    Product type Smart flush-mounted CO2 sensor-controller
    Manufacturer / code Sentera Controls / FCMFG-R
    Measured quantities CO2, temperature, relative humidity, ambient light level
    CO2 range 400–2000 ppm
    Temperature range 0…+50 °C
    Humidity range 0–95 % rH, non-condensing
    Accuracy ±0.4 °C (5…50 °C), ±0.8 °C (-20…50 °C); ±3 % rH (20–80 %), ±5 % rH (5–95 %); CO2 ±(45 ppm + 3 %)
    Outputs AO1 according to the highest of T / rH / CO2: 0-10 VDC (RL ≥ 50 kΩ) / 0-20 mA (RL ≤ 500 Ω) / PWM 1 kHz, 3.3 or 12 VDC
    Communication Modbus RTU (RS485); firmware update via Modbus RTU
    Supply voltage 24 VDC or 24 VAC ±10 %
    Indication Red / yellow / green LED, ambient light sensor
    Installation Flush-mounted or surface-mounted
    Housing ABS plastic, white outside, black inside
    Protection class IP30 (EN 60529), indoor use only
    Storage temperature -10…+60 °C
    Weight 0.16 kg (net)
    Compliance LVD 2014/35/EU, EMC 2014/30/EU, WEEE 2012/19/EU, RoHS (EU) 2015/863

    Manufacturer documentation

    ✔ Recommended by Elektrotechnikos sprendimai

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

    Main functions

    • Integrated algorithm – the output follows the highest of T, rH and CO2 – direct control of an EC fan, an AC controller or a damper.
    • Parameters that can be disabled – can be controlled by CO2 only or any combination.
    • Modbus RTU – all measurements and settings are accessible remotely.
    • Firmware update – over the Modbus RTU network.
    • LED indication – red – value out of range or sensor fault, yellow – danger zone, green – normal; the CO2 level is shown by default.
    • Light sensor – adjustable “active” and “standby” illumination levels.
    • Replaceable CO2 element – the element can be replaced or calibrated without replacing the whole device.
    • Configuration – Configuration and monitoring – the free Sentera 3SModbus software (via the CNVT-USB-RS485 converter) or the Sensistant Modbus configurator.

    Where is it used?

    • Offices, meeting rooms, classrooms
    • Kindergartens, schools, auditoriums
    • Residential rooms and apartments
    • Restaurants, gyms
    • Demand-controlled ventilation with EC fans
    • BMS and SenteraWeb systems

    On-demand operation

    For the office demand-controlled ventilation designer.
    A single flush-mounted device directly controls an EC fan or damper according to CO2, T and rH without a separate controller.
    For the 24 V automation installer.
    The 24 VDC or 24 VAC power supply allows connection to the existing control panel transformer.
    For building maintenance services.
    A replaceable and calibratable CO2 element allows the device to be serviced without replacing it.

    Practical application

    If the ventilation damper of a meeting room has a 0-10 VDC actuator and the panel has a 24 VAC transformer, then the FCMFG-R is flush-mounted and proportionally opens the damper as CO2 rises from 400 to 2000 ppm.

    Application guide: how it is used in practice

    The same FCMFG-R adapts to different sites – only what is connected to its outputs changes:

    Site What is connected Result Installer's note
    Classroom, conference room AO1 0-10 VDC → EC fan control input The fan speeds up as CO2 rises; in an empty room – minimum T and rH can be disabled – control by CO2 only
    Room with a VAV / air damper AO1 → damper actuator 0-10 VDC input The damper opens in proportion to air quality Actuator input resistance ≥ 50 kΩ
    AC fan AO1 → analog input of an electronic or transformer controller AC fan speed according to CO2 Check the speed controller's input signal type
    Building with BMS Modbus RTU → A, /B Measurements and settings centralised A separate address for each device

    How to choose a CO2 transmitter

    Installation / output / power supply Recommended model
    Room, 3 separate outputs T / rH / CO2, 24 VDC, 4 wires RSMFF-3 (multifunction transmitter, -F)
    Room, 3 separate outputs T / rH / CO2, 24 VDC or 24 VAC, 3 wires RSMFG-3 (multifunction transmitter, -G)
    Room, 1 control output based on T / rH / CO2, 24 VDC RCMFF-3 (smart sensor, -F)
    Room, 1 control output, 24 VDC or 24 VAC RCMFG-3 (smart sensor, -G)
    Flush-mounted / surface-mounted, 1 output, powered from the 230 V mains FCMF8-R (85–264 VAC)
    Flush-mounted / surface-mounted, 1 output, 24 VDC or 24 VAC FCMFG-R (24 VAC/VDC) ← this model
    Duct, 1 control output based on T / rH / CO2, 24 VAC/VDC DCMFG-2R (smart duct sensor)
    Duct, NDIR CO2 + T + rH, Modbus RTU only DSCDG0-4 (no analog outputs)
    Duct, NDIR CO2 + T + rH, 3 analog outputs + Modbus RTU DSCDG3-4 (3 outputs)
    Rule: by installation location (wall, flush-mounting box, duct) and by what is needed: separate T / rH / CO2 signals for a controller or BMS (transmitter, 3 outputs), a single control signal directly to an EC fan or damper (smart sensor), or Modbus data only. Choose the supply according to the site's control circuit: -F – 24 VDC, 4-wire; -G – 24 VAC or 24 VDC, 3-wire; 8 – directly from the 230 V mains.
    When to choose another solution: for wall mounting – RCMF-3 series; for separate signals – RSMF-3 series; without CO2 – FCTH series; for a duct – DCMFG-2R.

    Pros

    • CO2, temperature and humidity in one device
    • Modbus RTU, firmware updated over the network
    • Integrated control algorithm – no separate controller needed
    • Replaceable, calibrated CO2 element
    • Flush-mounted or surface-mounted installation

    Cons / limitations

    • One control output – for separate signals choose a transmitter
    • CO2 measuring range 400–2000 ppm – intended for indoor air quality, not for industrial gas monitoring
    • IP30 – dry rooms only

    Safety and installation notes

    • Installation and connection are to be carried out by a qualified electrician / automation specialist with the power disconnected.
    • Supply voltage – 24 VDC or 24 VAC ±10 %.
    • Device with a common ground: never connect its common ground to other devices powered by direct voltage (DC) – the connected devices may be damaged.
    • Resetting the Modbus communication parameters – with a jumper on PROG pins 1 and 2 for at least 5 s.
    • For indoor use only; do not install in direct sunlight.

    Quick selection guide

    CO2 400–2000 ppm
    0…+50 °C
    0–95 % rH
    0-10 VDC / 0-20 mA / PWM
    24 VDC / 24 VAC
    IP30
    Suitable when you need:
    • to implement demand-controlled ventilation by CO2 level;
    • to control an EC fan or damper directly from the sensor;
    • to integrate air quality data into a BMS via Modbus RTU.
    Check before use:
    • the input type of the controlled device;
    • the supply: 24 VDC or 24 VAC ±10 %;
    • the installation location – an occupied zone, not near doors or windows.
    Important reminder: The FCMFG-R measures CO2 to assess indoor air quality; it is not a gas leak or safety detector.

    FAQ

    Does it measure VOC?
    No, CO2, temperature, relative humidity and ambient light are measured.
    Can it be controlled by CO2 only?
    Yes, the temperature and humidity parameters can be disabled.
    What are the output signals?
    One output 0-10 VDC, 0-20 mA or PWM and 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.
    What power supply does it operate from?
    24 VDC or 24 VAC ±10 %.

    Smart flush-mounted CO2 sensor-controller | CO2 400-2000ppm | T 0…50°C | 0-95%rH | 0-10VDC/0-20mA/PWM | Modbus RTU | 24VAC/VDC | IP30 | Sentera Controls | FCMFG-R

    Sentera FCMFG-R – smart flush-mounted CO2 sensor-controller: CO2 400–2000 ppm, temperature 0…+50 °C, humidity 0–95 % rH, 0-10 VDC / 0-20 mA / PWM control output and Modbus RTU, 24 VDC or 24 VAC ±10 % supply. For demand-controlled 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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