Honeywell 2104B2131 Searchline Excel Medium Range Gas Detector Receiver

The Honeywell 2104B2131 is a medium-range infrared receiver belonging to the Searchline Excel open-path gas detection system. It works paired with a dedicated transmitter to continuously detect flammable hydrocarbon gas along a linear monitoring path, measuring gas concentration expressed as LEL.m for hazardous area safety monitoring.

This unit carries ATEX hazardous area certification with robust stainless steel housing rated IP66. It delivers fast response performance and supports analog signal output to fire and gas control systems. Widely deployed for facility upgrade, maintenance and spare part replacement in oil, gas and petrochemical hazardous sites.

Main Specifications

• Brand: Honeywell Analytics
• Model: 2104B2131
• Series: Searchline Excel Open Path Gas Detector
• Detection Range: 40 m ~ 120 m medium monitoring path
• Measurement Range: 0 ~ 5 LEL.m hydrocarbon gas
• Power Supply: 18 VDC ~ 32 VDC operating voltage
• Response Time: T90 ≤ 3 seconds under standard conditions
• Enclosure Protection: IP66 stainless steel housing
• Certification: ATEX approved for explosive hazardous zones
• Operating Humidity: 0 ~ 99% RH non-condensing

Core Functions

• Receive infrared beam signal from matched open-path transmitter
• Detect methane, ethylene and other flammable hydrocarbon gases
• Calculate gas concentration and output standard analog measurement signal
• Support configurable low and high gas concentration alarm thresholds
• Built-in continuous self-diagnosis for beam obstruction and hardware faults
• Resist interference from fog, rain and minor atmospheric disturbances
• Stable signal transmission to fire & gas safety control systems
• Precision optical assembly with adjustable mounting alignment bracket
• Long-term continuous operation in outdoor industrial hazardous environments
• Simplified on-site calibration and routine maintenance procedures

Application Scenarios

• Offshore platform and onshore oil & gas production facilities
• Petrochemical refineries and chemical processing plants
• LNG terminals, gas storage stations and pipeline compressor stations
• Power plant gas turbine fuel supply area safety monitoring
• Coal chemical industry flammable gas leak detection projects
• Hazardous zone perimeter linear gas monitoring systems
• Tank farm and loading/unloading area safety protection systems
• Marine process equipment open-path gas detection installation
• Legacy Honeywell Searchline Excel system renovation and spare parts
• Industrial park hazardous material warehouse gas monitoring solutions