Handheld Nitrogen Dioxide (NO2) gas leak detector draws the gas by built-in micro pump, fast response, precision measurement and easy carrying.

Features

• LCD dot matrix display, direct readout of gas type, unit, concentration, local time, etc.
• Support English/Chinese operation, easy to shift.
• Gas concentration unit PPM and mg/m³ can be shift quickly.
• Built-in micro-sampling pump, 10 grades of suction are available.
• Explosion-proof certification

Gas Detector Functions

• With self-calibration and zero calibration functions, makes the detection more accurate and reliable.
• One key to restore factory setting, free from maloperation.
• With temperature and pressure compensation, able to realize the compensation for the gas concentration under different temperature and pressure environments.
• Two-stage alarm with sound and light, and alarm point is settable.
• Rechargeable lithiumpolymer battery with large capacity.
• High-strength special engineering plastic housing, with anti-slip, waterproof, dustproof and explosion-proof

Specification

Note:
* If you need a NO2 gas detector with other measuring ranges unlisted in above table, please contact us to inform your operating environment, so as to help you choose an appropriate one for your application.
* We also provide other common gas detectors, and you can refer to RDDLZ Gas Detector Catalog to get the specific gas type and measurement range. If you have any questions, please feel free to contact us.

*** Other Common Gases and Ranges Available for Portable Gas Detectors

Details

Applications

Tips: Portable gas detector working principle

The gas detector can detect a variety of gases, and is widely used in petrochemical, coal, metallurgy, chemical, municipal gas, environmental monitoring and other places for on-site detection. It can meet the measurement needs of special occasions; it can detect gas concentration or leak detection in tunnels, pipelines, tanks, confined spaces, etc.

The type of gas can be distinguished by measuring the absorption spectrum, the concentration of the gas can be determined by measuring the absorption intensity. The infrared detector has a wide range of use, which can not only analyze the gas composition, but also the solution composition, and has high sensitivity, rapid response, and continuous online instructions, and it can also form an adjustment system. The detection part of the infrared gas detector commonly used in industry is composed of two parallel optical systems with the same structure.

One is the measurement room and the other is the reference room. The two chambers open and close the light path at the same time or alternately at a certain cycle through the light cutting board. After the gas to be measured is introduced into the measurement chamber, the light with the unique wavelength of the gas to be measured is absorbed, so that the luminous flux entering the infrared receiving gas chamber through the optical path of the measurement chamber is reduced. The higher the gas concentration, the less the luminous flux entering the infrared receiving gas chamber; and the luminous flux passing through the reference chamber is constant, and the luminous flux entering the infrared receiving gas chamber is also constant. Therefore, the higher the concentration of the gas to be measured, the greater the difference in luminous flux passing through the measurement chamber and the reference chamber. This difference in luminous flux is projected to the infrared receiving air chamber with the amplitude of a certain period of vibration.

The receiving gas chamber is divided into two halves with a few micrometers thick metal film. The chamber is sealed with a large concentration of measured component gas, which can absorb all the incoming infrared light within the absorption wavelength range, so that the pulsating luminous flux becomes the periodic change of temperature can be converted into a pressure change according to the gas equation, and then detected by a capacitive sensor. After amplifying, the concentration of the gas to be measured can be indicated. In addition to capacitive sensors, quantum infrared sensors that directly detect infrared can also be used, and infrared interference filters are used for wavelength selection and tunable lasers are used as light sources to form a new all-solid-state infrared gas detector. This kind of detector only uses a light source, a measuring chamber, and an infrared sensor to complete the gas concentration measurement. In addition, if filter discs equipped with multiple different wavelengths are used, the concentrations of various gases in multi-component gases can be measured separately at the same time.