Model IR-700
IR-700 Instruction Manual Rev. 4.3 Page 4 of 46
3) Model 700 Housing Bottom Assembly (contains the Housing Bottom, Flame Arrestor, Retaining Ring,
and rubber O-Rings)
4) Splash Guard.
NOTE: All metal components are constructed from electro-polished 316 Stainless Steel in order to maximize
corrosion resistance in harsh environments.
Plug-in Replacable
Combustible
Hydrocarbon Sensor
Splash Guard
Housing Bottom
Assembly
O-Rings
Lens and LCD
Display
Housing Bottom
Locking Set-Screw
Magnetic
Programming
Switches
Intelligent Transmitter Module (ITM)
Micro-Processor controlled circuit
encapsulated in an explosion proof
housing.
detcon inc.
LEL
MODEL
IR-700
Figure 6 Sensor Assembly Breakaway
1.4 Plug-in Replaceable Sensor
The Detcon IR combustible hydrocarbon gas sensor is a unique and miniaturized single-package optical design
that generates enough internal heat to prevent condensation. It is packaged as a true plug-in replaceable type
sensor with over-sized gold-plated connections that eliminate corrosion problems. It can be accessed and
replaced in the field very easily by releasing the locking screw and unthreading the housing bottom. The Detcon
IR combustible hydrocarbon gas sensor and the CO
2
gas sensor have an infinite shelf life, and are supported by
a 5-year pro-rated warranty. The expected service life is 5 years or greater.
Figure 7 IR Sensor Cell
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