sensortec AG – Room Sensors with integrated Touch Display EL-THCV-D-MB
Measures temperature, humidity, CO2 and VOC with an integrated touch display.
Template for the sensortec AG EL-THCV-D-MB room sensor with integrated touch display. Reads temperature, relative humidity, CO2, and TVOC via Modbus RTU. Also allows control of display settings, temperature setpoints, and sensor offsets from the cloud.
- Protocol
- Modbus RTU
- Connection
- RS485, 19200 baud
- Registers
- 17, read and write
- Brand
- sensortec AG
- Key readings
- Temperature · Relative humidity · CO2 concentration · TVOC concentration · Temperature setpoint · Presence
- Available commands
- Temperature offset · Temperature setpoint · Display color and intensity · Display and setpoint configuration
- Compatible models
- EL-TH-D-MB · EL-THC-D-MB · EL-TV-D-MB · EL-THCV-D-MB
- Last updated
Registers (17)
7 read, 13 write
| Name | Unit | Access | Address (Hidden until you enter your email) | Function (hidden) | Type (hidden) |
|---|---|---|---|---|---|
| I_Temperature - Analogue sensor | °C | Read | |||
| I_Relative humidity - Analogue sensor | r.H. | Read | |||
| IC_CO2 concentration - Analogue sensor | ppm | Read | |||
| I_TVOC concentration - Analogue sensor | ppb | Read | |||
| I_Temperature - Setpoint | °C | Read and write | |||
| I_Read presence | Read and write | ||||
| I_Bitregister 4 | Read and write | ||||
| O_Temperature Offset | cK | Write | |||
| Display-Color | Write | ||||
| Display-Intensity | Write | ||||
| Display_ONfull_time | Write | ||||
| Display_ON_time | Write | ||||
| Display_Config | Write | ||||
| Setpoint_abs-rel | Write | ||||
| Setpoint_StepLength | Write | ||||
| S5_Config | Write | ||||
| AQM_Config | Write |
Loading registers…
Send your device list
If a device is not in the library yet, we build the template for free as soon as we have the register data.
Use cases
- Monitor temperature, humidity, CO2, and TVOC levels on a live cloud dashboard for each room.
- Create alerts when CO2 concentration exceeds a threshold to ensure timely ventilation adjustments.
- Remotely adjust temperature setpoints across multiple rooms without traveling to the building.
- Log indoor air quality data over time to generate reports for building owners or facility managers.
- Track presence status per room to correlate occupancy patterns with air quality trends.
- Configure display brightness and color remotely to match building schedules or occupant preferences.
Installation
Supply the sensortec EL-THCV-D-MB with 24 VDC/AC and mount it in a Feller EDIZIO.liv flush-mount box using the SNAPFIX mechanism.
Connect the RS-485 A and B wires from the sensor to the Modbus RTU port on your ModbusCloud Gateway, ensuring correct polarity and termination.
Set the Modbus slave address on the sensor according to the device manual, and confirm the baud rate is 19200 with odd parity (8E1).
In the ModbusCloud portal, add a new device and import the sensortec EL-THCV-D-MB template from the template library.
Assign the correct Modbus slave address in the portal to match the physical device setting, then verify that live readings appear on the dashboard.
If using a TH, THC, or THV variant, disable or ignore the registers for sensors not present on that model.
Things to watch for
Why am I not getting CO2 or TVOC readings even though the template is loaded?
Only the THCV variant supports all four measurements. If you have a TH or THC model, the TVOC registers will return no valid data. Check your product variant and disable unused registers in the template.
What unit does the temperature offset register use?
The temperature offset register uses centikelvin (cK) units. A value of 100 corresponds to a 1 K offset. Make sure to apply the correct scaling when writing to this register.
The gateway cannot communicate with the sensor. What should I check?
Verify that the baud rate is set to 19200 and parity is configured as odd (8E1) on both the sensor and the gateway. Also confirm the RS-485 wiring polarity (A to A, B to B) and that the correct slave address is configured.
Can I use multiple sensortec room sensors on the same RS-485 bus?
Yes, each sensor must have a unique Modbus slave address. Ensure proper bus termination on the first and last device, and keep total cable length within RS-485 limits.
Want to see how it works?
