Target: Natural gas, liquefied gas, coal gas, alkanes and other flammable gases
Model: ZC401
Detection range: 0~100%LEL
Detection principle: Catalytic combustion
Output signal: PWM/CAN/Analog quantity(Customizable)
Response time: T90<10s
Notes: IATF16949 compliant

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ZC401 is a low-power, miniaturized, digital sensor used in gas fuel engines and their gas supply systems. It uses an aerobic catalytic sensor, combined with a high-performance microprocessor, and has good electromagnetic resistance. It is widely used in emerging energy vehicles (CNG/LNG) due to its interference characteristics, excellent repeatability and product stability. 


  • Natural gas automobile fuel system


  • Adopt the principle of aerobic catalysis and gather the signal conditioning
  • Signal response is linear output, high sensitivity, low power consumption
  • The corresponding concentration value can be output by CAN communication


Natural Gas Leak Sensor
Detection principle Catalytic combustion
Detection target Natural gas, liquefied gas, coal gas, alkanes and other flammable gases
Detection range 0~100%LEL
Resolution ratio 1ppm
Detection accuracy ±10%(>1%VOL(CH4))
Operating voltage DC (9~16)V
Operating current <100mA
Power consumption <1.2W
Interface level 12V
Response time T90<10s
Recovery time ≤30s
IP rating IP67
Operating temperature  -40℃~85℃
Storage temperature  -40℃~125℃ 
Operating humidity 0~95%RH(No condensation) 
Output mode PWM/CAN/Analog quantity(Customizable)

* 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.