The PGS1000 family of devices is designed for stable, cost-effective safety monitoring in environments where hydrogen is used and stored, and includes two thermal conductivity chips in different configurations -- all contained in a compact surface mount configuration. Is a new MEMS thermal conductivity hydrogen sensor released by Posifa Technologies.
The technology also enables hydrogen detection capabilities at a much lower cost, thanks to the company's highly repeatable, high-capacity CMOS MEMS technology. And these sensors measure hydrogen concentrations in the air by measuring changes in the thermal conductivity of gas mixtures. This measurement method provides greater long-term stability and allows for smaller shape factors than hydrogen sensors trigger chemical reactions that ultimately lead to sensor deterioration
This design promotes an excellent SIGNal-to-noise ratio due to common-mode noise suppression and maximum signal amplification. For safe operation, the sensor uses pulse waveform excitation (400ms on, 1000ms off) to reduce the heater temperature. The series is based on its second generation heat-conducting molds. The device provides a mold sealed in dry air as a reference, while the other is exposed to the gas mixture
For these applications, the device consolidates a fast response time of 1.4 seconds and the broadest available range -- up to 100% capacity -- with typical long-term stability of 0.1% F.S/ year. The sensor is suitable for hydrogen leak detection and monitoring in industrial processes, medical facilities and automotive fuel cells.
