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MSA Ultima® OPIR-5 Infrared Open Path Gas Detector
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The OPIR-5 Detector is an open path IR gas detector that provides continuous monitoring of methane and propane gas concentrations.

MSA Ultima® OPIR-5 Infrared Open Path Gas Detector

The OPIR-5 Detector is an open path IR gas detector that provides continuous monitoring of methane and propane gas concentrations. The system consists of an IR source and receiver which continuously monitor for methane in both the 0 to 5000 ppm•meter and 0 to 5 LEL•meter range. A 0 to 2000 ppm•meter and 0 to 1 LEL•meter range is also available for monitoring propane. The OPIR-5 Detector provides two 4 to 20 mA analog signals proportional to each of the above ranges, in addition to a digital display and relay contacts.

The OPIR-5 Detector is easily aligned using the digital display and adjustable mounting arms, therefore it does not require any bulky setup equipment (e.g. digital volt meters, handheld alignment aids). The OPIR-5 Detector’s sensitivity can be checked by placing a test gas film in front of the receiver.

The OPIR-5 Detector is calibrated at the factory and needs no further calibration. It also requires little maintenance save for a periodic visual inspection, test gas film check, and cleaning of the windows to assure dependable performance.

Sensor data and status information from the OPIR-5 Detector can be transmitted up to 9,000 feet to any industrial analog to digital (A/D) converter for use in multi point computer-based monitoring.

Features and Benefits

  • Dual detection range enables sensitivity to both small (ppm•meter) and large (LEL•meter) gas leaks
  • Performance approved for use in harsh environments
  • Single detection beam improves accuracy and reduces drift.
  • Up to 150 meter path length
  • Multiple communication outputs (HART, ModBus, AMS Support) provide complete status and control capability in the control room.
  • Unitized display for ease of operation and reduced cost.
  • Automatic gain control compensates for dirty optics, rain and fog.
(Text and photo's courtesy of MSA)

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About is operated by Accurate Instruments (NZ) Ltd.
Accurate is one of the few 100% New Zealand owned and operated safety instrumentation companies in New Zealand today. This is in a market dominated by larger foreign owned companies, yet we continue to operate as a strong independent supplier to the NZ market.

We specialize in the supply, service and support of safety equipment and safety systems to protect workers and their workplaces with some of the world’s top quality technical safety instruments available, yet our pricing is highly competitive and represents value for money.

We are instrument consultants, and endeavour to find the right solution for our client by careful analysis of the application and intended result. We pride ourselves on our professionalism, ethical industry responsibility, specialist advice and service, quality of product, and of course our people.



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