Honeywell 705 HT Specifications

Model 705 HT Sensor

High temperature sensor
for combustible gases

Model 705
High Temperature Sensor

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

Flexibility

• 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

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.
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.