General Description

The SiC Two-Wire Flame Sensor (Flame Tracker) is a rugged, industrial-grade ultraviolet flame detector designed for continuous flame monitoring in harsh combustion environments.
Using silicon carbide (SiC) UV photodiode technology, the sensor reliably detects ultraviolet radiation emitted by flames from heavy oil, low-calorific-value fuels, and gas turbine combustion systems.

The device outputs a 4–20 mA two-wire signal, enabling long-distance transmission, intrinsic simplicity, and seamless integration with turbine and industrial control systems.

Detection Principle

Sensing technology: Silicon Carbide (SiC) ultraviolet photodiode

Spectral response: UV band specific to flame radiation

Flame suitability:

Heavy oil flames

Low calorific value fuel flames

Gas turbine combustion flames

SiC UV technology provides strong immunity to visible light, hot surfaces, and background radiation.

Electrical Characteristics

Signal output: 4–20 mA (two-wire loop powered)

Power supply: 12–32 VDC

Combined power and signal loop

Remote monitoring: Supported via current loop diagnostics

Mechanical and Interface Specifications

Process connection: 3/4-inch NPT female thread

Housing material: Stainless steel

Optical window: Sapphire UV window

Weight: Approximately 3–5 kg

The stainless steel housing and sapphire window ensure high durability in high-temperature, high-vibration environments.

Environmental Specifications

Sensor head temperature resistance:

Withstands gas turbine exhaust temperatures

Electronics body operating temperature:

−40 ℃ to +70 ℃

Designed for installation in combustion chambers and burner housings with extreme thermal conditions.

Safety and Certification

Explosion protection:

Class I, Division 2

ATEX

IECEx Zone 2

Certified for use in hazardous industrial environments.

Core Features

SiC UV detection technology for high flame sensitivity

Two-wire 4–20 mA output for simple wiring and high noise immunity

Self-diagnostic circuitry for continuous health monitoring

Remote status monitoring via control system

Resistant to moisture, steam, oil mist, and combustion by-products

Robust design for high-temperature and harsh environments

Functions and Applications
Core Function

The flame sensor detects ultraviolet radiation emitted by combustion flames using SiC photodiodes and converts flame intensity into a proportional 4–20 mA output signal.
Integrated self-diagnostic circuitry enables continuous monitoring of sensor health and supports early fault detection, improving system safety and reliability.

Typical Applications

Gas turbine combustion chamber flame monitoring

Industrial boilers and burners

Heating furnaces

Refining and petrochemical process heaters

The sensor supports:

Burner start-up and shutdown logic

Flame presence verification

Combustion safety interlocks

Fault alarms and protective shutdowns

It is fully compatible with Mark VIe and similar turbine control systems.

Key Advantages

Reliable flame detection for difficult fuels and low-intensity flames

Minimal maintenance due to solid-state SiC sensing technology

High resistance to false triggering from ambient light and hot surfaces

Certified for hazardous locations

Proven suitability for gas turbine and industrial combustion safety systems

GE RS-FS-9001｜Flame Detector｜