The New Point Open Path for Superior Hydrocarbon Detection

The new Point Open Path IR sensor from N.E.T is the perfect solution for instances where response time and measurement reliability are crucial factors in combustible gas detection.

Overview of Point Open Path IR Sensor

The Pop-S-IR can offer a clear improvement over the standard capacity of infrared sensors detecting methane, propane and other hydrocarbons in LEL range.

This is thanks to its careful design which ensures measurements are unaffected by ambient humidity changes and T90 below 7 seconds.

The sensor employs both an infrared source of energy and a pair of pyroelectric detectors, each one attuned to varied ranges of wavelengths in the spectrum’s infrared portion. The active detector functions in the range of absorption of the target gas, while the reference detector is not sensitive here.

The IR source is guided into an open gas chamber, via a glass window. A mirror at the chamber’s rear reflects light back into the main area and into the pyroelectric detectors.

Where the target gas is found in the measurement chamber, this lowers the intensity of the signal picked up by the active detector, but not that of the reference detector. The ratio of the two signals is calculated in a combustible gas concentration by the sensor microprocessor through N.E.T.’s exclusive algorithm.

Benefits of Infrared Technology

The reliability of infrared technology means that frequent calibrations are no longer required (the Long Term Drift is ±3% of FS range/year), and exposure to gas and other contaminants has no effect on the life on the sensor. This means the overall cost of ownership is significantly lowered.

The unit boasts ATEX IECEx and SIL approvals, making it certified to a level beyond any other sensor available.

Detection performance is enhanced by the lengthy optical path, reaching incredible levels of precision of ±1% of FS range for readings under 25% of the nominal range and effective resistance to ambient humidity effects.

IR Sensors Enable Simple Integration into any Gas Detectors

The new Point Open Path IR sensor from N.E.T. offers simple integration into any gas detector:

  • The unit is a full conformity ATEX and IECEx explosion proof IR detector head for surface applications
  • SIL2 rated, for accredited reliability (fail-safe detection)
  • Front thread (¾”, 1” or M20) to allow for simple attachment to a standard gas detector housing.
  • Standard analog (voltage/current) or personalized output
  • Digital output with Modbus and UART P2P protocol
  • Comes equipped in a conveniently sized, weatherproof enclosure with a rain cover. Optional dust and hydrophobic filters can be ordered separately.

This information has been sourced, reviewed and adapted from materials provided by Nano Environment Technology (N.E.T).

For more information on this source, please visit Nano Environment Technology (N.E.T).

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