SenTec

SEM329 Formaldehyde CH2O concentration sensor

SEM329 formaldehyde transmitter designed by our company adopts electrochemical sensor which has the characteristics of high measurement accuracy, fast response speed, long service life, long stability and reliability. The output resolution of the equipment can reach 0.01ppm, and it can be monitored online for 24 hours for a long time. It is mainly used in Industries or equipment that require long-term online monitoring of formaldehyde concentration, such as smart homes, air cleaners, and air conditioners.

SEM329 formaldehyde transmitter designed by our company adopts electrochemical sensor which has the characteristics of high measurement accuracy, fast response speed, long service life, long stability and reliability. The output resolution of the equipment can reach 0.01ppm, and it can be monitored online for 24 hours for a long time. It is mainly used in Industries or equipment that require long-term online monitoring of formaldehyde concentration, such as smart homes, air cleaners, and air conditioners.

The equipment adopts wide-voltage 10-30V DC power supply, 485 signal output, standard Modbus-RTU communication protocol, ModBus address can be set, baud rate can be changed, and the maximum communication distance is 2000 meters.

Parameters

Power supply10~30V DC
Average power consumption0.12W
Output signal485 output (standard Modbus protocol)
RangeTemperature-40℃~+80℃
Humidity0~100%RH
Formaldehyde0~5ppm
AccuracyTemperature±0.5℃(25℃)
Humidity±3%RH(60%RH,25℃)
Formaldehyde±5%FS, no less than 5%Vol oxygen environment
Working temperature-20~50℃
Working humidity0~95%RH non-condensing
Working pressure91~110Kpa
Stability≤7% signal value/year
Repeatability≤2%
Response time≤35S
Warm-up time≥5 minutes
Formaldehyde zero drift≤±0.5ppm
Service life≥24 months
Resolution0.01ppm

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