What are the types of NDIR infrared gas sensors

Overview:

Non-dispersive infrared (NDIR) gas sensors are used to measure the gas concentration in the surrounding atmosphere. The NDIR gas sensor can monitor various gases, including carbon dioxide (CO) 2), carbon monoxide (CO), methane (CH4), and sulfur dioxide (SO2). Other gas parameters.

The working principle of NDIR infrared gas detector:

The NDIR infrared gas detector uses infrared radiation to perform its function. An infrared lamp guides infrared light into the gas sample, and the light enters the infrared light detector through the gas particles and optical filters. Once the detector receives light, the concentration of a specific gas can be calculated. By analyzing the difference between the amount of infrared light produced by the lamp and the amount of electricity reaching the detector, industry professionals can determine the amount of light absorbed by gas molecules. Since many gases have unique absorption bands, understanding this factor can identify the presence in the sample The number of gas molecules. The concentration can be calculated as a percentage (%) of the sample or parts per million (PPM).

Types of NDIR infrared gas sensors:

1. NDIR infrared CO2 sensor

NDIR infrared CO2 sensor is one of the most reliable and accurate CO2 gas sensor technology. Features: It has the best sensitivity and is most suitable for the detection of CO2 than electrochemical sensors, and has a longer service life. The NDIR C02 sensor typically uses an infrared light (IRL715). When it emits infrared light and passes through a special sensor room, the CO2 gas will absorb infrared light of a specific wavelength. By using a special detector, the light signal is converted into a corresponding The interference of electrical signals and other infrared absorbing gases is minimized.

2. NDIR infrared CH4 sensor

In order to meet the needs of customers for high-reliability natural gas detection and alarm sensors, the NDIR infrared CH4 sensor was developed. It uses NDIR technology, including high-reliability infrared detectors and infrared light sources, and has long-term stable performance. It has digital output, self-monitoring and Diagnostic features, factory pre-calibration and complete testing ensure a long-term working life of at least four years.