IR5500 Open Path Gas Detector

The IR5500 Open Path Gas Detector provides continuous monitoring of combustible gas concentrations that pose a significant danger at petrochemical, electric utility, wastewater treatment, and other types of plants. It is reported to be the first open-path detector to meet International Society of Automation (ISA) performance requirements on both the lower explosive limit (LEL) and parts-per-million (ppm) scales, the first with a split-range scale for ppm and LEL monitoring, and the first to be certified for operation at –55°C. In addition, it is among the first major open-path detectors certified to FM Approvals, EN, and IECEx performance standards. Consisting of an infrared source and receiver, the system continuously monitors for methane in the 0–5,000 ppm and 0–5% LEL ranges, as well as for propane in the 0–2,000 ppm and 0–1% LEL ranges. The IR5500 provides two 4–20-mA analog signals proportional to each of the above ranges, in addition to a digital display and relay contacts. The advanced IR sensor has a single-beam detection design, which improves accuracy and reduces drift, and includes continuous self-check monitoring for fail-to-safe operation. Automatic gain control compensates for dirty optics, rain, and fog. Unlike most open-path detectors, the IR5500 features a built-in display, which simplifies installation and maintenance while reducing the total cost of ownership. Sensor data and status information from the IR5500 can be transmitted up to 9,000 ft to any industrial analog-to-digital (A/D) converter for use in multipoint computer-based monitoring. Event logging is provided for faults, maintenance, warning, and alarm events. The IR5500 is available with HART and Modbus, providing complete status and control capability in the control room.