51307186-275 HONEYWELL

51307186-275 HONEYWELL Analog Input Module

Brand：HONEYWELL Model number：51307186-275

Country of origin: United States Product weight：0.4kg

HS code：8517623990

Product Details：

Product Dimensions：

The Searchpoint Optima Plus utilizes the dual wavelength infrared absorption principle to detect the presence of hydrocarbon gases. This method offers inherent fail-to-safe operation, meaning a fault or failure in the optics will result in a fault signal rather than a missed detection. The unit is microprocessor-controlled and features comprehensive built-in self-diagnostics and fault-finding facilities. The specific model 2108B2101 is typically configured as a Hydrocarbon version with a standard 4-20mA analog output.

Product Specifications

Detection Principle: Dual wavelength infrared absorption (IR).
Target Gas: Hydrocarbons and vapors (e.g., Methane, Propane, Ethylene).
Measuring Range: $0 \text{ to } 100\%$ LEL (Lower Explosive Limit).
Signal Output: $4\text{-}20 \text{ mA}$ analog output (auto-sensing sink or source).
Response Time: Very fast, typically $T50 < 3$ seconds, $T90 < 4$ seconds (for methane).
Material: Robust 316 stainless steel enclosure.
Ingress Protection: IP66/67, offering a high degree of protection against dust and water ingress.
Operating Temperature: Wide range from $-40^\circ \text{C}$ to $+65^\circ \text{C}$ .
Power Supply: $18\text{-}32 \text{ VDC}$ ( $24 \text{ VDC}$ nominal).
Safety Integrity Level (SIL): Independently assessed by TÜV to IEC61508 for SIL 2.
Hazardous Area Approvals: Certified for use in potentially explosive atmospheres, including ATEX, IECEx, UL, and CSA.

Product Advantages

Superior Reliability and Stability: The infrared principle is immune to catalytic poisons and inhibitors (like silicones or lead), which often degrade catalytic bead sensors, leading to a longer operational life and reduced maintenance.
Fail-Safe Operation: Infrared technology ensures that an obscuration of the optics or a light source failure is immediately signaled as a fault, providing confidence in continuous safety.
Fast Speed of Response: The rapid detection time provides the earliest possible warning of a gas leak, which is crucial for safety.
Low Maintenance: With no moving parts, increased stability from self-compensating optics, and resistance to poisons, the routine maintenance requirement is significantly reduced.
Advanced Diagnostics: Includes advanced internal fault diagnostics, false alarm rejection algorithms, and contaminated optics warnings, increasing operational uptime.
Wide Temperature Operation: The robust design allows for reliable performance in extremely hot or cold environments.

Important Considerations (Precautions)

Oxygen Level: The product must not be operated in atmospheres with more than $21\%$ oxygen to maintain electrical safety and certification requirements.
Certification Compliance: Do not modify or alter the construction of the product, as this will invalidate essential safety and certification requirements.
Zeroing and Calibration: Although the IR principle offers high stability, periodic re-zeroing and gas challenges (bump tests) are necessary to confirm correct function and maintain performance compliance.
Wiring: All electrical installation must adhere to local and national electrical codes, and the integral supply cables must be mechanically protected and properly terminated in a certified junction facility.
Test Gas Safety: During testing and calibration, some test gases may be hazardous, and the outlets from gassing accessories should exhaust to a safe area.

Product Applications

The 2108B2101 Searchpoint Optima Plus is deployed in industrial environments where the risk of flammable hydrocarbon gas or vapor release is present, particularly in harsh or remote locations.

Oil and Gas Industry: Offshore drilling rigs, platforms, and Floating Production Storage and Offloading (FPSO) vessels, refineries, and pipelines.
Petrochemical Plants: Manufacturing and storage facilities for chemicals and solvents.
Fuel Storage and Transfer: Tank farms, loading/unloading terminals, and compressor stations.
Power Generation: Gas turbine enclosures and areas utilizing natural gas as fuel.
Aerospace and Automotive: Facilities involved in fuel handling, painting, and solvent use.

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