Gas detection
The MPS™ sensor for gas detection
For early detection of gas leaks in your application.
The MPS™ sensor
The sensor is designed with MEMS technology, has a 15+ year lifetime, is immune to poisoning and does not require periodic calibration.
Using a patented membrane protection as well as a heat source, the sensor has a built-in protection against poisoning. The sensor also has a very high resistance to temperature variations and humidity, which together provide powerful protection against changes in the ambient environment. These ambient values can be read and documented.
The Molecular Property Spectrometer™ (MPS™) sensor offers:
- Unique gas sensor with gas classification and TrueLEL™ for combustible gases
- Simultaneously and with high accuracy detects mixed gases
- In-built environmental compensation, temperature, humidity and pressure
- Very wide environmental operating window -40 to 75°C and up to 100% humidity
- Low energy consumption (up to 29 mW on average)
- Analogue output or digital UART
- 15+ years sensor lifetime without the need for calibration
- Immune to poisoning and satiety
- Complies with UL 60335-2-40 (Issue 4), IEC 60335-2-40 (2022) and ASHRAE 15
- Global approvals ATEX (S4 vers.), FM, UL
- Available in standard versions for detection of a wide range of gases, as well as pre-calibrated versions for specific gases
The sensor was recently launched in version 5.0, the fifth generation of MEMS technology, with industry-leading performance, calibration freedom and low operating cost. The upgraded 5.0 MPS™ sensor now has FM CSA 22.2 60079-0:2019 & CSA 22.2 60079-11:2014 certifications. Soon also with approved EN50271 certification.
Lower Explosive Limit (LEL)
The smart sensor quickly detects, quantifies and classifies flammable gases and gas mixtures with unrivalled TrueLEL™ accuracy.
LEL = Lower Explosive Limit
Also known as LFL
It is the lowest concentration of a gas or vapour that will burn in air. The lower explosive limit varies from gas to gas, but for most flammable gases it is less than 5% by volume. This gives the sensor many advantages over an IR (NDIR) sensor or Pellistor sensor.
Comparable benefits for MPS™ MEMS
- No calibration needed, even in the field
- No poisoning; this is unlike sensors with Pellistor technology which are easily affected
- Self-reporting if gas is not detected (internal self-test)
- Gas identification of multiple gases with the same sensor
- Detects hydrogen; unlike IR
- Inbuilt environmental compensation; no cross sensitivity for T, RH, P
- Very precise - TrueLEL
- 15+ years lifetime
- Analogue output
- Digital UART
- Gas classification (digital device only)
- High temperature resistance in the operating range
- High accuracy, almost zero false positives
- Fast response time <30 seconds
- Durability, no maintenance required
- Multiple global approvals, IEC, UL etc. and approved for ATEX, FM equipment
Application with MPS™ A2L for refrigerant gases
In equipment where refrigerants are present, a sensor is required to detect whether the equipment is releasing dangerous gases in the event of a leak. Refrigerants are present in a variety of equipment such as ground source heat pumps, vending machines, refrigerators and air conditioners.
Advantages of Nevada Nano MPS™ A2L
- The sensor can detect A1, A2L and A3 gases.
- Built-in environmental compensation (-40 to 75°C/100 % humidity)
- Factory calibrated for R32 and other LGW refrigerants
- Fast response time <6 seconds
- High durability, no maintenance required, wide environmental operating range
Global approvals in refrigerants:
- AHRTI Best in Class Standard: Meets UL 60335-2-40 & ASHRAE 15 requirements
- IEC 60335-2-40 Edition 6 (January 2018)
- UL/CSA 60335-2-40 Edition 3 (Nov-2019)
- ASHRAE Standard 15-2019
- ASHRAE proposed standard 15.2P (advisory public review)
- JRA Standard 4068T: 2016R
Application with MPS™ Methane gas sensor
Specific advantages The methane gas sensor:
- Detects Methane gas from 50 to 1 M ppm (Several alternative ranges are available)
- Built-in environmental compensation (-40 to 75°C/100% humidity)
- Auto-gas classification and identification in real time
- Low power variant
- Monitoring 24/7
- Global approvals: ATEX, UL, etc.
