Honeywell 705 HT Series of Flammable Gas Sensors

UL certified, explosion-proof flammable gas detectors with high temperature version certified to 150°C.

Features & Benefits

  • Fast response speed/low power consumption
  • Greater than 5 year operating life
  • High-grade aluminum construction 

Quick Specs

  •  Operating temperature range: -25° to +150°C (-13°F to +302°F)
  •  Operating pressure: 75 to 110kPa (750 to 1100mbar)
  •  Range: 0-20% LEL, 0-100% LEL (control card dependent)

Product Overview

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. Utilizing 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.

Features & Benefits

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.

Additional Information

  1. Datasheet

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