GERNERAL MONITORS IR5500 Open Path Infrared Gas Detector

Overview

The General Monitors IR5500 is an open path infrared gas detector engineered for the rapid detection of combustible gas leaks across large areas. Using a single detection beam, it senses both small ppm.metre leaks and large LEL.metre leaks with dual detection ranges, providing early warning of gas releases in oil and gas, chemical, and industrial facilities.

Designed for harsh environments down to -55°C, the IR5500 combines a unitised display with continuous self-checking for fail-to-safe operation. The single beam design improves accuracy and reduces drift compared to dual-beam systems, while automatic gain control compensates for dirty optics, rain, and fog.

Engineering & Design

The IR5500 projects an infrared beam across a defined path between transmitter and receiver units, detecting gas clouds that intersect the beam. The single-beam design simplifies optical alignment and eliminates the drift issues associated with dual-beam configurations, improving long-term measurement stability.

Continuous self-diagnostics verify the integrity of the optical and electronic systems, automatically signalling a fault condition to fail the detector to a safe state. Multiple communication outputs including HART, Modbus, and AMS support provide complete status and control capability in the control room, while automatic gain control maintains sensitivity in degraded optical conditions.

Key Features

• Sensitive to small ppm.metre and large LEL.metre gas leaks
• Dual detection ranges for early and high-concentration alarms
• Single detection beam for improved accuracy and reduced drift
• Continuous self-check for fail-to-safe operation
• HART, Modbus, and AMS communication outputs
• Unitised display for easy operation
• Automatic gain control for dirty optics, rain, and fog
• Designed for harsh environments down to -55°C
• Open path coverage of large protected areas

Applications

• Oil and gas production and processing facilities
• Compressor stations and pipelines
• LNG and LPG storage and handling areas
• Chemical and petrochemical plants
• Gas turbine enclosures and process areas
• Perimeter monitoring around storage facilities

Specifications

Open path gas detection provides area monitoring that point detectors cannot match, and the General Monitors IR5500 covers long detection paths with a single beam, protecting large process areas economically. The IR5500’s dual-range sensitivity detects both small leak concentrations and flammable concentrations, giving early warning that supports timely operator response.

For open path detection, the General Monitors IR5500 is the established solution, and Seven Star LLC supplies the General Monitors IR5500 with engineering support for detection path planning.

The General Monitors IR5500 open path gas detector covers the distance between the transmitter and the receiver unit and measures the hydrocarbon gas concentration along the beam. The detector is mounted on the perimeter of the plant with the alignment bracket, and the beam is aligned with the optical target during the commissioning. The 4-20 mA signal is connected to the fire and gas system, and the detector is certified for the hazardous area of the installation.

Why Seven Star LLC

Seven Star LLC supplies the General Monitors IR5500 open path gas detector for fire and gas systems across the Gulf, with complete documentation and project support. Our team assists with path planning, mounting configuration, and integration with fire and gas logic solvers.

We support new installations and retrofit programmes for open path detection in oil and gas, chemical, and industrial facilities, providing spares and technical guidance throughout the GCC.

Reliability in the Field

The single-beam design of the IR5500 eliminates the alignment and drift issues of dual-beam detectors, while automatic gain control maintains sensitivity as the optics become contaminated or obscured by weather. Continuous self-checking confirms optical and electronic integrity, and any fault is reported to fail the detector to a safe state.

Communication via HART, Modbus, and AMS integrates the detector with fire and gas systems, DCS, and asset management platforms, providing complete status visibility from the control room.

Call To Action

For the General Monitors IR5500, open path infrared gas detector or any related control and instrumentation requirement, contact the Seven Star LLC team. Submit a formal inquiry through our RFQ page with your measurement range, connection and configuration, and our specialists will respond with a detailed commercial proposal and the official General documentation.