Model: ZRP370
Detection principle: Infrared principle
Characteristics: Adopt large field of view angle, high detection rate, and low microphone effect sensor
Size: Ø56mm*H21.5mm
Output signal: PWM, can be used as a 4-20mA control signal

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ZRP370 is a flame detection module based on the infrared and ultraviolet principle. It uses pyroelectric sensors, ultraviolet sensor and high-performance microprocessors. It is a flame detection module designed through the combination of different sensors. It has a built-in high-speed microcontroller to collect sensor signals and use reliable and efficient algorithms to effectively judge the fire. The interface is simple and the output signals are complete. Simply design a simple power circuit and relay circuit to develop a complete flame detector, shortening the product development cycle.


Space industry, storage facilities, printing industry, paint manufacturing, pharmaceutical industry, power generation facilities, machinery and automobile manufacturing, petroleum and petrochemical industry, etc.


  • Adopt large field of view angle, high detection rate, and low microphone effect sensor;
  • The ultraviolet sensor has a sun blind type, effectively reducing sunlight interference;
  • Combining multiple combustion substances to establish a data model with low false alarm rate;
  • M4 core high-speed microcontroller with fast response and low power consumption.


Model ZRP370
Detection object Combustion of hydrocarbons and non carbonaceous substances
Spectral range IR4.48um~5.0um, UV185-260nm
Operating voltage 5V (Carrying capacity not less than 2A)
Operating current ≤40mA
Interface level 0~3.3V
Output signal High and low levels can be used to drive relays
PWM, can be used as a 4-20mA control signal
Operating environment Temperature: -10~55℃
Humidity: 15%~90% RH (without condensation)
Dimension Ø56mm*H21.5mm
Response time Four levels are represented by the number of green LED flashes, with the green light flashing every 3 seconds representing the alarm time level. Level I: 6-10 seconds, used in non-interference environments and fast alarm situations; Level II: 15-18 seconds, used in non-interference environments and reliable alarm situations; Level III: 22-26 seconds, used in environments with interference and reliable alarm situations; Level IV: 3-4 seconds, used to demonstrate rapid alarms.
Adjust method Magnetic rod adjustment
Detecting distance 60m@0.3m*0.3m(Fuel: n-heptane)
Logic judgment OR Logic

* 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.