Target: Refrigerant gas R32
Model: ZP201
Detection range: Alarm value 5000ppm
Detection principle: Module,semiconductor
Characteristics: Air conditioning and refrigeration system refrigerant leakage detection
Size: 25×34×14.1
Working conditions: Working voltage 5±0.2V
Output PWM
Notes: PWM signal output needs to be connected with external pull-up resistor

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ZP201 refrigerant gas detection module adopts advanced multi-layer thick film manufacturing process semiconductor gas sensor element. The gas sensor element contains a filter adsorption layer to reduce the interference of alcohol and other gases, and has extremely high sensitivity to refrigerant gas. The module has been aged , calibrated, with good consistency and high sensitivity.


Used for air conditioning, refrigeration system refrigerant leak detection. 


High sensitivity, fast response, strong anti-interference ability, long life, stable operation, factory calibrated, sensor fault self-diagnosis


Model ZP201
Target Gas Refrigerant gas R32
Output Data PWM
Working Voltage 5.0±0.2V DC (No voltage reverse connect protection)
Output Data TTL level (200ohm protected resistance inside)
Working Current ≤80mA
Warm Up Time ≤3 min
Alarm Point 5000ppm
Operating Temperature 0~50℃
Operating Humidity ≤95%RH
Storage Temperature -20~60℃
Storage Humidity ≤60%RH
Size 25×34×14.1mm(L×W×H)
Weight 5g

* 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.