HONEYWELL 2106B2310 Sensepoint HT Flammable Gas Sensor

Description

Product Title

Honeywell 2106B2310 Sensepoint HT High‑Temperature Flammable Gas Sensor, ATEX Certified, M20 Thread

Product Detailed Description

The Honeywell 2106B2310 is a catalytic‑bead flammable‑gas sensor designed for hazardous‑area gas detection under high‑temperature ambient conditions. It delivers millivolt bridge output for measuring combustible gas concentrations within LEL (Lower Explosive Limit) range. Built with 316 stainless‑steel sensor housing, this ATEX‑approved sensor is intended to mate with approved Ex‑rated junction boxes for deployment in explosive‑risk industrial zones. It supports continuous operation at ambient temperatures up to +150 °C, making it suitable for hot‑process locations where standard‑temperature gas detectors cannot survive. Typical service life reaches 5 years under proper operating conditions; the sensor element is field‑replaceable without full system disassembly.

2106B2310

Technical Parameters

Compatibility & Installation Traps

Compatibility

1. Works with Honeywell Sensepoint series approved Ex‑d / Ex‑e junction boxes.
2. Compatible with Honeywell gas detection controllers accepting mV‑bridge sensor input.
3. Can interface with third‑party DCS / PLC systems with dedicated mV‑bridge input modules.
4. Not interchangeable with standard‑temperature Sensepoint sensors; high‑temp host configuration is mandatory.
5. Discontinued unit: No new‑factory production; only spare‑part inventory for existing installations.

Installation Traps & Common Pitfalls

1. Condensation risk: Even with high‑temperature rating, condensation inside sensor cavity will poison catalytic bead and cause permanent drift or failure; avoid dew‑point crossing conditions.
2. Cable & junction box requirement: Must use ATEX‑certified explosion‑proof junction box; ordinary general‑purpose enclosures invalidate hazardous‑area certification.
3. Sensor poisoning: Exposure to silicones, leaded compounds, high‑concentration sulphur‑containing vapors will degrade catalytic bead irreversibly.
4. Wiring constraints: mV‑bridge signal is low‑level; route signal cables away from high‑power cables, apply shielded cable with single‑end grounding to prevent EMI‑induced measurement drift.
5. Calibration negligence: After mechanical replacement or power‑cycle, mandatory zero‑and‑span gas calibration; raw installation without calibration yields invalid readings.
6. Mechanical stress: Do not turn sensor body by cable; apply torque only on thread fitting to avoid internal bead‑element damage.

Standard Operating Procedures (SOP)

1. Pre‑installation preparation: Confirm hazardous‑area zone classification matches ATEX rating of sensor and junction box. Power off host controller. Verify no silicone/poisoning‑agent exposure on‑site.
2. Mechanical mounting: Install sensor into certified Ex‑rated junction box via M20 thread; apply proper torque and sealing. Avoid mechanical torsion transferred to sensor core.
3. Field wiring: Use shielded field cable, strictly follow terminal assignment for mV‑bridge circuit. Implement single‑end shield grounding. Close junction box with all certified sealing fittings.
4. Power‑on: Restore power to detection controller; allow full warm‑up period for catalytic bead stabilization.
5. Calibration execution: Perform zero‑gas calibration, then span calibration with certified LEL‑standard gas mixture. Record calibration values.
6. Functional validation: Inject test gas; verify response speed and reading accuracy, confirm alarm threshold trigger as configured.
7. Commissioning handover: Log calibration date, gas concentration used, and test results into site maintenance record.
8. Routine maintenance: Schedule periodic bump‑test / full calibration; replace sensor element when drift exceeds allowable tolerance or after 5‑year service cycle.

Typical Application Scenarios

‑ Gas‑turbine enclosure flammable‑gas monitoring (high ambient temperature) ‑ Oven / drying‑process hazardous‑gas detection ‑ Petrochemical hot‑process hazardous‑area monitoring ‑ Refinery high‑temperature pipe‑bay gas leakage surveillance ‑ Power‑plant legacy safety‑system spare‑part retrofitting ‑ Coating‑and‑printing industry thermal‑process gas‑safety monitoring

2106B2310

Matching Supporting Components

‑ ATEX‑certified Ex‑d / Ex‑e M20 junction box for Sensepoint series ‑ Honeywell gas detection controller supporting mV‑bridge sensor input ‑ Certified calibration gas cylinders (zero air, LEL‑span gas) ‑ Shielded hazardous‑area field instrument cable ‑ Calibration adapter for on‑site bump‑test ‑ Replacement catalytic bead sensing element

Related Honeywell Model Recommendations

1. 2106B2311: Variant Sensepoint HT high‑temperature flammable sensor with different thread specification.
2. M25 Sensor Assembly: Direct modern successor for 2106B2310 for new‑build high‑temp flammable‑gas projects.
3. 2106B22xx Series: Standard‑temperature Sensepoint flammable sensors (not for >80 °C ambient).
4. XCD Series: Honeywell next‑generation fixed gas detector platform for hazardous‑area upgrade migration.