Description

Honeywell 2104B2081 Medium-range Infrared Open-Path Gas Detector (Transmitter Port)
Honeywell 2104B2081 is a medium-range infrared open-path gas detector (transmitter port Tx) from the Honeywell Searchline Excel series, designed for long-distance gas monitoring in industrial environments, with ATEX explosion-proof certification.

Core parameters
Brand: Honeywell (
Model: 2104B2081
Type: Open Path IR Gas Detector (Tx at middle range)
Detection principle: Infrared absorption (IR), detects combustible gases (such as methane)
Detection range: 40–120 m (middle range)
Power supply: 18–32 VDC (nominal 24 VDC)
Power consumption: Maximum 10 W
Output signal: 4–20 mA; optional Modbus RS485
Operating temperature: -40°C to +65°C
Shell: 316 stainless steel; IP66/IP67
Size / Weight: Approximately 235 mm; 7 kg
Certification: ATEX, IECEx, FM, CSA (Explosion-proof)
Condition: Brand new original equipment, 12-month warranty

Key features
Long-range coverage: Single set covers 40–120 meters, suitable for factory areas, pipe galleries, and large plant zones.
Maintenance-free infrared technology: No consumables, long lifespan, resistant to water vapor and dust interference.
Explosion-proof + weather-resistant: 316 stainless steel casing, IP66/IP67, applicable in extreme temperatures.
Fast response: T90 ≤ 10 seconds, accuracy ±2% FS.
Easy installation alignment: Comes with alignment tools, no need for complex debugging.
Typical applications
Oil and gas platforms, refineries, chemical plants
Power plants, large tank areas, gas stations
Long-distance pipelines, tunnels, large factory gas monitoring