Optical Flame and Gas Detectors

Spectrex has been a provider of optical flame and combustible gas detection solutions for the onshore, offshore, oil and gas, chemical and petrochemical industries for more than 30 years. The company's services include protection of storage tanks for hydrocarbon fuels and gases, filling operations, aircraft hangars and many other areas where hydrocarbons are used or transported.

Optical flame detection

The SharpEye series of flame detectors are highly specified and can function to the highest standard even in extreme conditions. This series includes the tripe IR (IR3) multispectrum detector that can detect small fires up to 65m (215ft) away.

The SharpEye 40/40I flame detector has an impressive 65m (215ft) detection distance for hydrocarbon fires, and uses the IR3 technique to provide highest immunity to false alarms.

The detectors have a heated lens for continued availability in difficult environments, and a compact and lightweight design, resulting in low power consumption. They also have the reassurance of many third party approvals:

  • Performance - FM 3260 and EN54-10
  • Reliability - IEC 61508 - SIL2 (TUV) certification
  • Hazardous Area Ex - ATEX, IECEx, FM/FMC, GOST R and GOST K for Zone 1 / 21

As a result, the warranty period is extended to a full five years.

The detectors self-test for continuous optimal operation, with interface options including 0-20mA (stepped), HART, dry relay contacts and RS-485 ModBus. They can operate in temperatures between -55ºC to +75ºC, with an option up to +85ºC.

Detection of gas flames, including hydrogen

Spectrex gas flame detectors can detect methane, LNG, LPG etc. gas flames at distances of up to 30m (100ft). The 40/40M multi IR detector can detect hydrogen flames at 30m (100ft) and hydrocarbon fires at 65ft (215ft) at the same time.

Flame detection for Zone 0 areas

The SharpEye 20/20MI IR3 detector is designed for hazardous areas, for example floating roof storage tanks. Combined with zener barriers in the safe area, this compact detector offers all the benefits of IR3 technology in a small package, with a detection range of up to 40m (132ft), with stepped mA and RS485 output options.

Optical open-path combustible gas detection

The SafEye Quasar 900 open-path combustible gas detector series is made up of four models with detection distances from 4m (13ft) to 200m (660ft), and is ideal for perimeter and pipeline monitoring and plant protection. Open-path detectors can replace a number of 'point' type gas detectors and provide better coverage.

A heated lens is incorporated for continued availability in difficult environments, with an operating temperature range of -55°C to +65°C (-67°F to +149°F).

Output options include 0-20mA, HART and RS485 Modbus. The standard measuring range is 0-5 LEL.m for C1 to C8 hydrocarbons.

Third party approvals for the Quasar 900 include:

  • Performance - FM 6235 and EN60079-29-4
  • Reliability - IEC 61508 - SIL2 (TUV)
  • Hazardous Area EX - ATEX, IECEx, FM/FMC, GOST R and GOST K for Zone 1/21

Air / turbine intake ducts

The SafEye 300 duct-mounted open-path detector is a perfect solution for rapid combustible gas detection in air and turbine intake ducts between 0.6m and 15m (2ft-50ft), as it has a high-speed response of two seconds.

Ranges include 0-2.5 LEL.m or 0-1 LEL.m. The detector is Ex approved, meets SIL2 requirements and includes HART capability.

Contact Details

Spectrex Inc.
218 Little Falls Road
Cedar Grove
07009 New Jersey
United States of America
+1 973 239 8398

Available White Papers


SharpEye 40/40 Detectors Protect Ghazlan Power Plant 07 August 2015 Spectrex Has Recently Supplied the Ghazlan Power Plant with SharpEye Optical Flame Detectors.