In-Duct Mount CO2 Transmitter
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In-Duct Mount CO2 Transmitter provides precise real-time monitoring of carbon dioxide levels within air ducts, with optional temperature and relative humidity sensing for comprehensive air quality analysis.
Note: All Tongdy monitors and controls ship direct from the factory. Please allow 10-15 business days for shipping and handling.
Its specially designed waterproof sensor probe with a porous film ensures easy installation and reliable operation in duct environments. Featuring an easy-to-read LCD display, the unit offers one to three configurable 0-10V or 4-20mA linear outputs. Users can adjust the CO2 measurement range via Modbus RS485 and configure inverse proportional outputs to suit diverse HVAC control applications.
- Real time carbon dioxide detection in air duct
-
High accuracy temperature and relative humidity
with extendable air probe into air duct - Water-proof and porous film around the sensor probe
- Up to 3 analog linear outputs for 3 measurements
- Modbus RS485 interface for 4 measurements
-
Available with or without LCD display
Specifications
| Monitoring Parameters |
CO2 |
Temperature |
Relative Humidity |
| Sensing element | Non-Dispersive Infrared Detector (NDIR) | Digital combined temperature and humidity sensor | |
| Measuring range |
0~2000ppm(default) 0~5000ppm (selectable in the order) |
0℃~50℃(32℉~122℉) (default) | 0~100%RH |
| Display Resolution |
1ppm |
0.1℃ |
0.1%RH |
| Accuracy @25℃ (77℉) | ±60ppm + 3% of reading |
±0.5℃ (0℃~50℃) |
±3%RH (20%-80%RH) |
|
Lifetime |
15 years (normal) |
10 years |
|
| Calibration cycle | ABC Logic Self Calibration |
—— |
—— |
| Response Time | <2 minutes for 90% change | <10 seconds to reach 63% | |
| Warm up time | 2 hours (first time)2 minutes (operation) | ||
|
Electrical Characteristics |
|||
| Power supply | 24VAC/VDC | ||
| Consumption | 3.5 W max. ; 2.5 W avg. | ||
|
Outputs |
Two or three analog outputs0~10VDC(default) or 4~20mA (selectable by jumpers) 0~5VDC (selected at place the order) | ||
| Modbus RS485 interface (optional) | RS-485 with Modbus protocol, 19200bps rate, 15KV antistatic protection, independent base address | ||
|
Conditions of Using and Installation |
|||
| Operation conditions | 0~50℃(32~122℉); 0~95%RH, non condensing | ||
| Storage conditions | 0~50℃(32~122℉)/ 5~80%RH | ||
|
Weight |
320g | ||
| Installation | Fixed on the air duct with 100mm installation hole size | ||
| IP class (housing) | IP50 for no LCD IP40 for with LCD | ||
| Standard | CE-Approval | ||
Downloads
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Product Information
Product Information
In-Duct Mount CO2 Transmitter provides precise real-time monitoring of carbon dioxide levels within air ducts, with optional temperature and relative humidity sensing for comprehensive air quality analysis.
Note: All Tongdy monitors and controls ship direct from the factory. Please allow 10-15 business days for shipping and handling.
Its specially designed waterproof sensor probe with a porous film ensures easy installation and reliable operation in duct environments. Featuring an easy-to-read LCD display, the unit offers one to three configurable 0-10V or 4-20mA linear outputs. Users can adjust the CO2 measurement range via Modbus RS485 and configure inverse proportional outputs to suit diverse HVAC control applications.
- Real time carbon dioxide detection in air duct
-
High accuracy temperature and relative humidity
with extendable air probe into air duct - Water-proof and porous film around the sensor probe
- Up to 3 analog linear outputs for 3 measurements
- Modbus RS485 interface for 4 measurements
-
Available with or without LCD display
Specifications
| Monitoring Parameters |
CO2 |
Temperature |
Relative Humidity |
| Sensing element | Non-Dispersive Infrared Detector (NDIR) | Digital combined temperature and humidity sensor | |
| Measuring range |
0~2000ppm(default) 0~5000ppm (selectable in the order) |
0℃~50℃(32℉~122℉) (default) | 0~100%RH |
| Display Resolution |
1ppm |
0.1℃ |
0.1%RH |
| Accuracy @25℃ (77℉) | ±60ppm + 3% of reading |
±0.5℃ (0℃~50℃) |
±3%RH (20%-80%RH) |
|
Lifetime |
15 years (normal) |
10 years |
|
| Calibration cycle | ABC Logic Self Calibration |
—— |
—— |
| Response Time | <2 minutes for 90% change | <10 seconds to reach 63% | |
| Warm up time | 2 hours (first time)2 minutes (operation) | ||
|
Electrical Characteristics |
|||
| Power supply | 24VAC/VDC | ||
| Consumption | 3.5 W max. ; 2.5 W avg. | ||
|
Outputs |
Two or three analog outputs0~10VDC(default) or 4~20mA (selectable by jumpers) 0~5VDC (selected at place the order) | ||
| Modbus RS485 interface (optional) | RS-485 with Modbus protocol, 19200bps rate, 15KV antistatic protection, independent base address | ||
|
Conditions of Using and Installation |
|||
| Operation conditions | 0~50℃(32~122℉); 0~95%RH, non condensing | ||
| Storage conditions | 0~50℃(32~122℉)/ 5~80%RH | ||
|
Weight |
320g | ||
| Installation | Fixed on the air duct with 100mm installation hole size | ||
| IP class (housing) | IP50 for no LCD IP40 for with LCD | ||
| Standard | CE-Approval | ||
Downloads
Description
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Product Category: HVAC Controls
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