Model TP-700
TP-700 Instruction Manual Rev. 4.1 Page 7 of 42
NOTE: Always protect the sensor cell with the Detcon Sealing Cap and a fresh desiccant packet
when the sensor is powered off, this will avoid permanent sensor cell damage and help preserve
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. 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 Figures 6, 7, 8, and 9 below), but any
appropriately rated enclosure with a downward facing ¾” Female NPT connection will suffice.
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.
Male 3/4" NPT Threads
Sensor Assembly
Splash Guard
2.125"
7.8"
Typ.
Ferrite Cylinder
Sensor Wires
2"
0.3"
5.48"
MODEL
TP-700
detcon inc.
H
2
S Sensor
Figure 6 Outline and Mounting Dimensions (Sensor Assembly only)
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