Electronics

5 years without calibration of flammable gas sensor

“Sensors manufactured and calibrated in early 2017 have been in operation for five years,” the company said. “During this period, the accuracy of the MPS sensor remains within specifications, despite no additional calibration, no deterioration or drift, and regular exposure to flammable gases. “

This family includes components that detect 0-100% LEL (Lower Explosion Limit) across 19 flammable gases and 6 refrigerant gases.

  • Flammable gas sensor (0% to 100% LEL – lower explosive limit)
  • Methane gas sensor (range from 50ppm to 1Mppm)
  • Refrigerant sensor for A1, A2L, A3 refrigerant

Nevada Nano 5 Year MPS GraphOne type of sensor has been tested for five years, but the results are clearly read across the other sensors.

“This was the flammable sensor used in these tests, but the MPS hardware is exactly the same for the flammable, methane, and refrigerant versions,” Nevada Nanopp of Marketing Gary Collins told Electronics Weekly. “The device has been tested by an independent manufacturer on the East Coast of the United States for two years and then at the Nevada Nano facility for the past three years.”

How do they work?

Collins says the sensor utilizes the thermodynamic properties of the surrounding air / gas mixture.

The gas diffuses through the mesh screen into the chamber that holds the MEMS sensor module.

The MEMS hot plate is electrically heated while the resistance temperature detector measures the temperature rise of the sample.

The heat information obtained can be used to determine the energy required to heat the sample. This is compensated for by the environmental temperature, pressure, and humidity values ​​measured simultaneously by other sensors in the device.

This number is corrected in the gas category and used to generate the output value.

The company describes these sensors as “essentially unaffected by drift, attenuation, or addiction,” and predicts a lifespan of 10 years or more without the need for calibration, based on accelerated lifespan testing. ..



https://www.electronicsweekly.com/news/products/sensors-products/five-years-without-calibration-flammable-gas-sensors-2022-05/ 5 years without calibration of flammable gas sensor

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