Target: CH4(1%LEL), CO(1ppm), H2S(1ppm), O2(0.1%LEL)
Model: ZCE04B
Detection range: 0-100%LEL ,0-1000ppm ,0-100ppm ,0-30%LEL
Detection principle: Module,catalytic, electrochemical
Characteristics: The detection of toxic and harmful gas and combustible gas in special places will give an alarm when the concentration exceeds the standard to remind people to evacuate
Size: 41×41×21.6
Working conditions: Working voltage :3.5-5V
Response time:<30s
Working current:<100mA
Output :UART(2.8V level)

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The 4-in-1 detection module ZCE04B is mainly aimed at various places where ambient gas detection is required. The product contains four gas sensors (expandable for CO, H2S, O2 and CH4 gases) and a signal processing circuit board. The module has good selectivity and stability. The module can output the current concentration values of the four gases in real time through the digital serial port output. It can be used in handheld devices or fixed devices to detect the current concentration of ambient gas. This module is a general-purpose miniaturized product that closely combines mature sensor detection technology and sophisticated circuit design.


It can be used in the environment of factory gas leakage, underground operation, tunnel detection, coal mine detection and so on. It can be worn by human body or hand-held into the detection place, or it can be used in fixed place to detect the current environmental gas concentration and remind
personnel to be safe.


  • High integration, small size,
  • Good stability and fast response
  • Real-time serial port output concentration, easy to use


Model No. ZCE04B
Detection gas CO: 0-1000ppm H2S: 0-100ppm O2: 0-30%vol CH4: 0-100%LEL
Resolution CO: 1ppm H2S: 1ppm O2: 0.1%vol CH4: 1%LEL
Working Voltage 3.5-5V
Working Current <100mA
Response Time <30s
Output Way UART (2.8V level)
Working Conditions -20~50℃,15~90%RH
Storage Temperature 0~20℃ (recommended)
Expected Life span 2 years (in clean air)

* The description and specifications might be changed without notice. Please contact us for the latest information before placing orders.

Technical Support:

Customized technical design and function, LOGO and package are available without extra charge (including molding fee) for mass volume.

The sensors don't have sleeping mode. It can be set in program if needed.

All Winsen products go through strict inspections and tests to make sure they are 100% qualified before shipping out.

The sensor has been fully tested (not calibrated) before leaving the factory. However, after transportation and storage, the environment conditions change, and the surface of the sensor absorbs moisture, mixed gas, pollution matters, etc. It is recommended that customers perform aging and calibration after sensors become stable according to the program and use occasions of the whole device.

15﹪-90﹪RH without condensation,greater or less than this range or long-term high temperature and high humidity will affect the life of the sensor.

Our sensors are certified with CE, 3C, ROHS, anti-explosion, fire prevention, and coal mining safety according to different applications. And we provide assistance for new certification.

Many factors can cause the sensor to fail such as broken wires in transportation, poisoning, falling off of the sensitive material, damage to the heating wire (device), etc. Please find specific cause in each category with Winsen’s aftersales.

Winsen provides professional consultation and service before and after sales. We will recommend the best fitting sensor for your demand. If you have any problem, don’t hesitate to email us to

Due to high volume of daily incoming emails and time zone difference, we may not be able to reply your emails immediately. But we will reply to your inquiry in 24 business hours.