Target: CO, H2S, NH3, CL2, SO2, NO2, O2 and other gases
Model: ZE03G
Detection range: See manual
Detection principle: Module, electrochemical
Characteristics: Portable and fixed gas detector, various gas detection equipment and situation.
Size: ø23.5mm*24.5mm
Working conditions: See manual

ZE03G Manual download
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ZE03 is a general-purpose and high-performance electrochemical module. It uses imported three electrodes, electrochemical gas sensor and high-performance micro-processor. By installing different gas sensor, the module could detect relevant gas. It is with built-in temperature sensor to make temperature compensation, which makes it could detect the gas concentration accurately. It has the digital output and analog voltage output at the same time which facilities the usage and calibration and shorten the development period. It is a combination of mature electrochemical detection principle and sophisticated circuit design, to meet customers’ different detection needs.


Portable and fixed gas detector, various gas detection equipment and occasion.


  • High sensitivity & resolution
  • Low power consumption
  • UART and analog voltage output
  • Good stability and excellent anti-interference ability


Model No. ZE03
Target Gas CO, H2S, NH3, CL2, SO2, NO2, O2, etc
Measurement Range Refer to table 2.
Working Voltage DC5±0.1V
Working Current <5 mA
Output Data UART Output (TTL electrical level,3V)
Analog Voltage (refer to table2. for sensor original amplifying signal)
Working Life 2 years
Operating Environment Temp.:-20~50℃
Humidity.:15%-90%RH (no condensation)
Storage Environment Temp.: 0~20℃
Size ø23.5mm*24.5mm

* 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.