MPS™ True LEL™ Ultra Low Power Flammable Gas Sensor
MPS™ True LEL™ Ultra Low Power Flammable Gas Sensor
Overview
NevadaNano’s MPS Ultra Low Power (ULP) Flammable Gas Sensor builds upon its fifth-generation predecessor and boasts an average power that has been reduced by a factor of 20. As a smart sensor, it delivers industry-leading performance by quickly detecting, quantifying, and classifying myriad flammable gases and gas mixtures with unprecedented TrueLEL™ accuracy. It comes factory calibrated for its entire 15+ year life—no field calibrations are required and has built-in environmental compensation and automatic self-testing for fail-safe operation. The sensor is robust, extremely poison resistant, and certified intrinsically safe. Sensor readings are output on a digital bus.
Features
- Built-in environmental compensation
- Automatic multi-gas accuracy in real-time
- Can detect flammable gas at start-up
- Built-in self-test for fail-safe operation
- Supports 15+ year lifetimes
- No calibration required
- Extremely poison resistant
- Can be powered by 3V
- Low average power: 1.35 mW typical at 3V
- Intrinsically safe (IS) certified
- Compliant to IEC 60079-29-1 Edition 2.1 Annex A
Gas Classification
The old way: Conventional sensing technologies (e.g. catalytic bead, NDIR) use a “k-factor” multiplier to convert raw sensor signals to gas concentrations in % LEL. These “k-factors” are based on known relative sensitivities of these sensors to different gases. A single “k-factor”, corresponding to a particular gas, must be selected manually during system setup; if the sensor is then exposed to a gas other than the one selected, significant errors in reported concentration can occur.
The MPS™ way: The MPS™ Flammable Gas Sensor applies a real-time conversion factor automatically, using the latest measured thermal properties of the ambient air/gas and the environmental conditions. The %LEL values reported for the bulk, which may contain a mixture of gases, achieves the same high levels of accuracy achieved with single gases.
MPS™ True LEL™ Ultra Low Power Flammable Gas Sensor
MPS™ True LEL™ Ultra Low Power Flammable Gas Sensor
The MPS Ultra Low Power (ULP) Flammable Gas Sensor is a smart sensor with built-in environmental compensation that detects and accurately quantifies over a dozen gases as well as gas mixtures. It is intrinsically safe, robust, extremely poison-resistant, and calibrated for all gases by performing only a single calibration with methane. Sensor readings are output on a standard digital bus.
The MPS transducer is a micro-machined membrane with an embedded Joule heater and resistance thermometer. The transducer is mounted on a PCB and packaged inside a filtered enclosure that is permeable to ambient air. The presence of a flammable gas causes changes in the thermodynamic properties of the air/gas mixture. These properties are measured by the transducer and processed by patented algorithms to report an accurate concentration and to classify the flammable gas.
Other sensing technologies (e.g. catalytic bead, NDIR) require a “k-factor” multiplier to convert raw sensor signals to gas concentrations in %LEL. These “k-factors” are based on known relative sensitivities of these sensors to different gases. A single “k-factor”, corresponding to a particular gas, must be selected manually during system setup; if the sensor is then exposed to a gas other than the one selected, significant errors in reported concentration occur.
In contrast, the MPS ULP Flammable Gas Sensor applies a real-time conversion factor automatically, using the latest measured thermal properties of the ambient air/gas and the environmental conditions