Nevada Nano MPS Gas Sensors Questions

  • How does the Nevada Nano MPS methane gas sensor work?
  • The MPS Methane Gas Sensors share the same internal design and software as their Flammable Gas Sensors, but are calibrated to measure real-time leak detection of CH4 methane. Because of their built-in environmental compensation and long-life, they are well suited to be deployed as a low-cost-per-node grid sensor array in the oil and gas industry. The sensors can also be used as a primary data collection device for soil gas analysis or for methane safety monitors.

  • How does the Nevada Nano MPS flammable gas sensor work?
  • Nevada Nano’s MPS Flammable Gas Sensors deliver unprecedented reliability and accuracy. Unlike traditional sensors, the MPS sensors accurately report 0-100% Lower Explosive Limit (LEL) across 15 different gases with a single factory calibration and no field maintenance over their lifetime. The MPS flammable gas sensor’s accuracy is enhanced by integrated, real-time measurements and built-in compensation for temperature, pressure, and humidity. Gas concentration readings are accurate across the full environmental range, including rapid environmental transients, delivering best-in-class accuracy while eliminating false positives. These MPS sensors are inherently immune to long term drift and poisoning.

  • How does the Nevada Nano Refrigerant gas sensor work?
  • NevadaNano’s Molecular Property Spectrometer™ (MPS™) Refrigerant Gas Sensor provides accurate and reliable detection of mildly flammable (A2L) R-32, R-454b blends, R-1234yf and other low global warming refrigerant gases such as (A1) R744 as well as (A3) R290 and R600 common in HVAC applications. With a 10+ year calibration interval and lifetime, the MPS Refrigerant Gas Sensor delivers industry-leading performance and a low total cost of ownership.

    The refrigerant sensor is designed to operate inside or outside refrigeration units. Due to its cost, effective price, it can be implemented in a grid pattern, allowing the user to pinpoint slow leaks within as little as an 8 foot radius. Combined with the fast response time and immunity to poisoning by other gases, this makes it easy to track down and fix refrigerant leaks in a supermarket or cold-storage commercial operation.

    The MPS Refrigerant Gas Sensor comes in two models: the S4 (cylindrical) design for LEL (lower explosion limit) measurement and the “Mini” for leak detection. Both sensors meet UL 60335-2-40 & ASHRAE 15 requirements.

  • How does the Nevada Nano Pellistor (Cat Bead) sensor work?
    A pair of small beads—one coated with a chemical catalyst, the other with an inert material—are both heated to a high temperature (400-500°C) using heaters (e.g., coiled platinum wire) built into their cores. In the presence of a flammable gas, the catalyst-coated bead produces an exothermic reaction, causing it to heat up more than the reference bead. This temperature difference can be measured using a resistance bridge circuit, the output of which is proportional to the concentration of the flammable gas present.

  • How does the Nevada Nano MPS Non-dispersive Infrared (NDIR) sensor work?
    This technology works by using infrared light to detect different wavelengths absorbed by gases. These sensors consist of an infrared source, a detector, an optical filter, a gas cell, and signal processing mechanisms. Infrared light is absorbed as a particular gas passes through an active filter, while infrared light that does not interact with the target gas goes through a reference filter. The sensor determines the difference between these two transmitted light intensities to develop a gas concentration.

  • Does Nevada Nano shrink sensor?
    NevadaNano, has brought out the MPSTM Mini –  a miniaturised version of the Molecular Property Spectrometer (MPSTM) Flammable Gas Sensor.

  • What is LEL in gas detection ?
    The flammable range is considered the values between the Lower Explosive Limit and Upper Explosive Limit. At these ratios, the combustible and flammable gases and vapors will burn or explode if an ignition source is present. The list below includes the Lower Explosive Limit and Upper Explosive Limit of some of the most commonly used fuel gases. Lower Explosive Limit and Upper Explosive Limit figures are defined as the percentage by volume of the air. 
  • In gas detection, the amount of gas or vapor present is denoted as a percentage of Lower Explosive Limit. Zero percent means that the atmosphere is entirely free of explosive and flammable gases. One hundred percent means that the gas concentration is at its lower explosive limit. A 50% reading indicates that gas or vapor concentration is half what is needed to combust. The relationship between Lower Explosive Limit percent and percent by volume varies from gas to gas.

    It’s important not to confuse the percentage reading on a gas sensor device with the actual Lower Explosive Limit concentration. For instance, a 50% reading for methane means that the concentration is actually 2.2. The Lower Explosive Limit concentration for this gas is 4.4, making a 50% reading half this amount.