Detcon TP-700 - Manual (Page 11)

Model TP-700
TP-700 Instruction Manual Rev. 3.5 Page 7 of 38
packet when the sensor is powered off, this will avoid permanent sensor cell damage and help
preserve the span calibration.
2.4 Mounting Installation
The TP-700 sensor assembly is designed to be threaded into a ¾” Female NPT fitting of a standard cast metal,
Explosion-Proof Enclosure or Junction Box. There are two wrench flats on the upper section of the sensor that
should be used to thread the sensor into the ¾” NPT receiving connection. Thread the sensor up until tight (5
turns is typically expected) and until the display is pointed in the direction that sensor will normally be viewed
and accessed.
NOTE: Do not use Teflon Tape or any other type of Pipe Thread material on the ¾” threads
unless the unit is mounted in a severe or harsh environment. Metal-on-metal contact must be
maintained to provide a solid electrical ground path. If Teflon Tape is used the Sensor must be
externally grounded using a ground strap.
The TP-700 should be vertically oriented so that the sensor points straight downward. The explosion-proof
enclosure or junction box would then typically be mounted on a wall or pole. Detcon provides a standard
selection of junction boxes available as sensor accessories (See Figure 4 below), but any appropriately rated
enclosure with a downward facing ¾” Female NPT connection will suffice.
3.675"
3/4" NPT
Explosion Proof Enclosure
Junction-Box
Sensor Assembly
Splash Guard
(Detcon's Junction-Box shown)
2.1"
5.5"
4.95"
5.25"
4.88"
2"
12.45"
M
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Use Spacers to move
the J-Box and Sensor
Assembly away from the
wall at least 0.25-0.5" to
allow access to Sensor
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7.205"
Ø0.265 x2
S
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Mounting Holes
8-32 Thread
Ground Point
MODEL
TP-700
detcon inc.
H 2 S Sensor
Figure 6 Outline and Mounting Dimensions
When mounting on a wall, it is recommended to use a 0.25”-0.5” spacer underneath the mounting ears of the
Detcon standard J-Box to offset the sensor assembly from the wall and create open access around the sensor
assembly. Spacing requirements for other junction boxes may vary.