With the increasing emphasis placed by the state on the safety of natural gas use, household natural gas leak detector is undergoing a revolutionary transformation from mechanical to electronic intelligence. In this development process, NTC chip assists natural gas leak detector in improving gas concentration detection accuracy with its unique temperature sensitivity, and efficiently ensures the safety of users' lives and property.

At present, common household natural gas leak detector on the market mostly choose laser methane sensor or infrared methane sensor as the core component of natural gas concentration detection. And NTC chip also plays different roles in this:

1. Stabilize the working temperature of the laser methane sensor to ensure the accuracy of the gas concentration process

As the core component of laser methane sensor, the output wavelength and light intensity stability of the laser have a great impact on the monitoring results. However, temperature drift can easily change the output characteristics of the laser and lead to monitoring errors, so it is necessary to install NTC chip to monitor the laser temperature in real time. NTC is generally electrically connected to the TEC of the laser, and when the working junction temperature changes, the resistance value of the NTC chip changes accordingly. Subsequently, the working parameters of the laser are adjusted through the feedback circuit, the temperature drift is suppressed, and the output wavelength and light intensity of the laser are stable, thereby improving the accuracy of gas concentration detection of the laser methane sensor and assisting the natural gas leak detector to better complete daily work.

2. The dissipation coefficient of NTC is used to improve the detection stability of infrared methane sensor

During the operation of infrared methane sensor, when infrared light of a specific wavelength passes through a gas containing methane, methane molecules will selectively absorb part of the infrared light, resulting in a change in light intensity. Infrared methane sensors detect this change in light intensity through an infrared thermopile, and after amplification and analog-to-digital conversion, the methane gas concentration can be accurately calculated.

When natural gas leaks, changes in methane gas concentration in the environment change the thermal environment around the NTC chip. When the methane gas concentration increases, the dissipation power of NTC changes, causing its temperature to change, which in turn leads to a change in resistance value and ultimately reflects as a voltage change. By measuring this voltage change, the real-time methane gas concentration can be obtained, and then the user can be prompted in time through the natural gas leak detector to prevent safety accidents.

Whether the household natural gas leak detector uses a laser methane sensor or an infrared methane sensor, the NTC chip plays a pivotal role in helping it accurately detect natural gas leaks and providing strong support for home safety warning. In order to ensure the smooth operation of the natural gas leak detector, strict requirements are also put forward for the electrical performance of the NTC chip. The DT-G series gold termination NTC chip developed and produced by EXSENSE Electronics has excellent consistency to ensure that the methane sensor maintains great stability when detecting gas concentration. In addition, the gold termination thermal chip has high accuracy, which can better assist methane sensor in gas detection compared with traditional NTC chip. The small dimension of the gold termination NTC ( can reach 0.25mm×0.25mm) can meet the needs of the current demand for miniaturization of household natural gas leak detector and save more installation space. Therefore, with its outstanding characteristics, DT-G series gold termination NTC chip of EXSENSE Electronics lays a solid foundation for the stable and accurate operation of household natural gas leak detector, and has become a key line of defense to ensure the safety of household natural gas use.