HONEYWELL 261A1812P012 | UV Flame Sensor High Sensitivity
HONEYWELL 261A1812P012 | UV Flame Sensor High Sensitivity - Image 2
HONEYWELL 261A1812P012 | UV Flame Sensor High Sensitivity - Image 3

HONEYWELL 261A1812P012 | UV Flame Sensor High Sensitivity

  • Model: 261A1812P012
  • Brand: HONEYWELL
  • Series: LG1093AA24 / ITS Flame Scanner
  • Core Function: Detecting hydrocarbon flame UV radiation
  • Type: Ultraviolet Flame Sensor
  • Key Specs: 190-290 nm spectral sensitivity, <200 ms response time
Category: SKU: HONEYWELL 261A1812P012

Description

Key Technical Specifications

  • Sensor Type: Ultraviolet Flame Sensor
  • Spectral Sensitivity: 190-290 nm
  • Response Time: <200 ms
  • Operating Temperature: -40°C to 177°C
  • Pressure Resistance: 21 bar (300 psi) @ 316°C (600°F)
  • Housing Material: 1.4571 Stainless Steel
  • Window Material: Fused Quartz
  • Mounting Interface: 3/4 inch internal NPT
  • Cable Characteristics: PTFE material, orange sheath, 4.9 m lead length
  • Recommended Operating Voltage: 260-350 VDC (suggested 325 VDC ±25 VDC)
  • Pulse Output: 275 times/second ±25 times/second
  • Background Noise: <5 min⁻¹

Product Introduction

HONEYWELL 261A1812P012 is a high-performance ultraviolet flame sensor designed specifically for industrial gas turbines. It detects UV radiation emitted by hydrocarbon flames and converts this signal for reliable combustion control.This sensor features a fused quartz window and a 1.4571 stainless steel housing to withstand harsh environments. With a response time under 200 ms and a spectral sensitivity range of 190-290 nm, it provides fast, accurate flame verification to reduce trip times.

Installation & Configuration Guide

Preparation (10 min)
Review the OEM wiring diagram. Verify your 24 VDC supply is within ±10% tolerance. Gather a 3/4 inch NPT wrench and ESD-safe tools.Removal (5–10 min)
Isolate power to the scanner module. Disconnect the orange PTFE cable. Unscrew the existing sensor from the 3/4 inch internal NPT mount. (Always check for residual heat before touching the housing.)Installation (10 min)
Thread the new 261A1812P012 into the NPT fitting. Hand-tighten, then apply a quarter-turn with the wrench. Route the 4.9 m orange cable away from high-voltage lines to prevent signal interference.Power-On & Test (10 min)
Restore power. Measure the supply voltage at the connector (must be 260-350 VDC). Observe the pulse output on your control system. It should read approximately 275 pulses per second when viewing a stable flame.

Troubleshooting Quick Reference

  • No Signal / Zero Pulses: Check supply voltage first. If <260 VDC, the sensor will not start up. Verify cable continuity.
  • Erratic Pulse Output: Inspect the fused quartz window for soot or oil buildup. Clean with isopropyl alcohol. Check for electrical noise near the 4.9 m cable run.
  • False Flame Detection: Look for UV sources like arc welding or lightning nearby. Verify background noise is <5 min⁻¹.
  • Slow Response (>200 ms): Confirm the flame is within the sensor’s field of view. Check if the operating temperature exceeds 177°C.

Dimensions, Mounting & Wiring Notes

  • Mounting Thread: 3/4 inch internal NPT
  • Cable Length: 4.9 meters (orange PTFE sheath)
  • Terminal Notes: Ensure connections are tight. Loose terminals cause intermittent pulse loss. Always use crimped ferrules on stranded wire.

 

FAQ

Will this 261A1812P012 replace my old LG1093AA24 sensor?
Yes. The 261A1812P012 is the specific part number for the LG1093AA24 series. Just verify your mounting thread is 3/4 inch NPT before ordering.I’m getting false alarms. What did I miss?
Usually, it’s a dirty window or electrical noise. Wipe the fused quartz lens first. If that fails, check if your power supply is introducing ripple.What condition are these sensors in?
They are New Surplus. We verify origin, check for physical damage, and confirm the PTFE cable is intact. They are sealed in anti-static bags with a QC label.Do you test these before shipping?
Yes. Every unit goes through our SOP: origin verification, physical inspection, and electrical testing. We document the firmware version and jumper settings. Function is verified under test conditions.What is the lead time and MOQ?
We currently have stock. Minimum order is 1 piece. Standard lead time is 1-3 business days. Volume discounts apply for larger orders.How do I avoid ESD damage during install?
Wear a grounded wrist strap. The internal UV tube is highly sensitive to static discharge. Never touch the connector pins directly.What payment methods do you accept?
We accept standard B2B wire transfers and major corporate payment terms. Contact our sales team for net-30 approval on qualifying accounts.

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