High performance photoionization PID sensor 4R-PID

Dec 12,2022

In gas detection, PID technology refers to photoionization technology. It uses high-energy ultraviolet light to ionize organic gas to amplify charged ions on the board to form a current. The magnitude of the current reflects the concentration of the gas, thus having a PID sensor.

Photoion gas sensor (PID) is a highly sensitive and versatile detector that can detect volatile organic compounds (VOC, volatile organic compounds) and other toxic gases.

High performance photoionization PID sensor 4R-PID

Photoionization technology uses photoionization detectors to ionize and detect specific volatile organic compounds. The photoionization detector can detect those gases whose ionization potential energy is below the energy level of the ultraviolet light source radiation. His high-energy ultraviolet radiation can ionize most organic and some inorganic substances in the air, but can keep the basic components in the air from being ionized , such as N2, O2, CO2, H20.

With the rapid development of the economy, the types of pollution sources are increasing, especially in chemical industry areas, industrial concentration areas and surrounding environments. The pollution methods and ecological damage types are becoming more and more complex, the environmental pollution load is gradually increasing, and environmental pollution accidents occur from time to time. At the same time, as the public's environmental awareness gradually increases, various types of environmental pollution complaints and disputes are becoming more and more frequent, so the types and requirements for environmental monitoring are getting higher and higher.

One of the most notable features of photoionization is that after the gas is detected, the ions recombine into the original gas and vapor. Compared with traditional detection methods, it has important advantages such as portability, small size, high precision, high resolution, fast response, continuous testing, real-time performance, and high safety.


Product Description

4R-PID is a high-performance photoionization PID sensor.

4R-PID has the characteristics of high sensitivity, wide range and broad spectrum. It can detect thousands of volatile organic compounds (VOCs) and some inorganic vapors in different application fields, and can provide a detection range up to 10,000ppm and a detection limit of 1ppb, with extremely fast response speed and high resolution.

It can be used in all kinds of handheld portable and on-site fixed instruments, and can also be applied to various types of analytical instruments.

Product Features

■ Rich detection substances, can identify a variety of VOC
■ Good linearity
■ The environment (temperature, humidity) has little interference, and the error does not exceed 10%;
■ Full range can be customized

Product Specifications 

Technical indicators

Detection Range(ppm)       0~10 ppm 0~40ppm 0~100ppm 0~6000ppm 0~10000 ppm
Resolution 1ppb 10ppb 25ppb 500ppb 2ppm
Sensitivity(mv/ppm) >40 >10 >5 >0.1 >0.1
Target Gas VOC,Energy≤10.6eV Volatile Gases
Working Voltage 3.2~5.5 V
Zero Voltage U0>20 mV
Output Voltage 0.02~2.0V (3.3 V max)
Response Time(T90) ≤5 S
Accuracy ≤±2% (No Condensation)
Humidity 0~99% (No Condensation)
Working Pressure 800~1200 mbar
Storage Temp. 0~25℃
Working Temp. -20~50 ℃
Lifespan 3 years (lamp and  electrode not included)
Warranty 12 Months (lamp and  electrode not included)


PID sensors are widely used in emergency response, industrial hygiene, personnel safety, VOCs detection, environmental quality monitoring, petroleum, petrochemical safety, soil pollution and governance.

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