Winsen - ZE08-CH2O Electrochemical CH2O Detection Module (UART)

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ZE08-CH2O is a general-purpose and miniaturization electrochemical formaldehyde detection module. It utilizes electrochemical principle to detect CH2O in air which makes the module with high selectivity and stability. It is built-in temperature sensor to make temperature compensation. It has the digital output and analog voltage output at the same time. It is a combination of mature electrochemical detection principle and sophisticated circuit design.


*High sensitivity &resolution, Low power consumption, Long life
*UART/Analog Voltage/PWM wave output * Good stability, excellent ability of Anti-interference * Temperature compensation , Excellent Linear output

Main Application

Portable detector, air-quality monitor, air cleaner, air renewal system, air conditioner, smart home.

Technical Parameters Table

Module structure
Target Gas CH2O
Interference Gas Alcohol, CO & ect. 
Output Data - DAC (0.4~2V standard voltage output, corresponding concentration: 0 ~ fullscale)
UART output(3V TTL Electrical Level)
Working Voltage 3.7V~5.5V
Warm up time ≤3 minutes
Response time ≤60s
Resume time ≤60s
Detection Range 0~5ppm
Resolution ≤0.01ppm
Operating Temp. -20℃~50℃
Operating Hum. 15%RH-90%RH(No condensation)
Storage temp. 0~25℃
Working life 5 years (in clean air 18 ℃ ~ 25 ℃)

Pin Description

PIN Instruction
Pin1 Reserved
Pin2 DAC (0.4~2V for 0-full scale)
Pin3 GND Pin4 Vin Voltage input 3.7V~5.5V)
Pin5 UART(RXD) 0~3.3V data input
Pin6 UART(TXD 0~3.3V data output 
Pin7 Reserved