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Sieger 705 HT Sensor

The Model 705 high temperature sensor has been specifically designed for the detection of combustible gases in high temperature hazardous area locations. Typical applications include turbine enclosures and drying ovens used in solvent based printing and coating machines.

These applications require a sensor that provides reliable and stable detection allowing low level alarm settings across a wide temperature range. Utilising a specially matched pair of Sieger poison resistant combustible gas detection elements, the Model 705 High Temperature Sensor has a very stable baseline allowing alarm trip points to be set as low as 5% LEL across a temperature range of -25°C to +150°C (-3°F to +302°F). The gas measuring range can be configured from 0-20% LEL up to 0-100% LEL depending on the type of controller used.

The detector elements are housed in a UL hazardous area approved explosion proof assembly, and provide an industry standard 3 wire mV bridge output which can be connected to a suitable control device or converted to an analog output signal via a field transmitter.

Model 705 Sensor H2S Data Sheet
Model 705 Sensor for Combustible Gases Data Sheet
Model 705 HT Series Data Sheet
Fixed-Point Industrial Fire and Gas Detection Brochure
Gas Book Americas
705 Combustible Gas Sensor Manual
705 H2S Sensor and Transmitter for Electrochemical Cells Manual
705 CO Sensor and Transmitter for Electrochemical Cells Manual

Excellent Performance

  Certified for hazardous location operation up to +150°C (+302°F)
  Alarm trip points as low as 5% LEL
  Fast speed of response
  Poison resistant detectors
  Low power consumption

Cost Effective

  Low cost disposable sensor
  Greater than 5 year typical operating life

Reliable Operation

  Specially matched 'Sieger' detectors provide highest stability
  Proven technology from the World leader in combustible gas detection


  Measuring ranges from 0-20% LEL to 0-100% LEL
  Wide range of accessories

Robust Construction

  UL approved explosion proof enclosure
  High grade Aluminum construction

Ordering Information


2430K0001 705 Flammable Detector, SG16B Junction Box, WP


2430-0021 Junction Box, Class I, Div. 1 Groups BCD
02000-A-1640 Weatherproof cap for use with combustible detector including remote gassing nozzle (for Sensepoint, Signalpoint, Satellite (with adapter), XNX MPD and Series 2000)
00780-A-0035 Flow Housing
00780-A-0076 Stainless steel weather housing for Sensepoint HT or 705 HT (for use with in high temperature applications or with duct mounting kits)
02000-A-1635 Weatherproof cap for use with toxic detector including remote gassing nozzle (for Sensepoint, Signalpoint, Satellite (with adapter), XNX MPD and Series 2000)
02000-A-1642 Collecting cone for use with flammable detector (for Sensepoint, Signalpoint, Satellite (with adapter), XNX MPD and Series 2000)


00705-A-1733 705 Flammable Detector- Aluminium- UL- 3/4NPT- 0-100% LEL
00705-A-1735 705 High Temperature Flammable Detector- Aluminum- 150 deg C- UL- 3/4NPT

Please note - Product designs and specifications are subject to change without notice. The user is responsible for determining the suitability of this product.

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