Product Description – Honeywell 2104B2081 Searchline Excel Transmitter

The Honeywell 2104B2081 Tx MID Searchline Excel Transmitter is an advanced open‑path infrared gas detector, designed for mid‑range monitoring in hazardous industrial environments. Unlike traditional point detectors, it continuously scans a line‑of‑sight path between the transmitter (Tx) and receiver (Rx), enabling rapid detection of combustible gas clouds over wide areas.

Moreover, the system uses infrared absorption technology to calculate gas concentration, providing reliable and accurate measurements with fewer detectors. The transmitter features heated optics, weather compensation, and partial beam block tolerance, ensuring uninterrupted operation under extreme environmental conditions.

In addition, the 316 stainless steel housing and ATEX certification allow safe deployment in offshore platforms, petrochemical facilities, and power stations. Its robust design ensures durability against sunlight, welding arcs, lightning, and other optical interference.

Technical Specifications

General Information

• Brand: Honeywell

• Model Number: 2104B2081

• Part Number: 2104B2081

• Type: Searchline Excel Mid-Range Transmitter (Tx)

• System Compatibility: Open-path gas detection systems

• Country of Origin: USA

• Shipping Weight: 10 kg

Detection & Measurement

• Detection Range: 40–120 m (130–390 ft)

• Detection Principle: Infrared open-path absorption

• Target Gases: Combustible hydrocarbons (methane, propane, etc.)

• Output Signal: 4–20 mA DC

• Response Time: Rapid detection of gas clouds

Physical & Environmental

• Power Supply: 24 VDC nominal

• Housing Material: 316 stainless steel

• Dimensions (H × W × D): 211 × 353 × 433 mm

• Weight: 7 kg

• Operating Temperature: –40 °C to +85 °C

• Ingress Protection: IP66 / IP67

• Special Features: Heated optics, weather compensation, partial beam block tolerance

• Certifications: ATEX, CE

FAQ

Q1: What type of gases can the 2104B2081 detect?
A: It detects combustible hydrocarbons such as methane, propane, and similar gases.

Q2: What is the detection range of this transmitter?
A: The mid-range coverage extends from 40 to 120 meters (130–390 feet).

Q3: Can it operate in harsh environmental conditions?
A: Yes, it withstands extreme temperatures, sunlight, lightning, and optical interference.

Q4: Is the device certified for hazardous areas?
A: Yes, it is ATEX and CE certified for safe operation in hazardous locations.

Q5: How does it prevent false alarms?
A: Weather compensation, partial beam block tolerance, and heated optics minimize false triggers.