36 Thermalert GP Series Operator’s Manual
42
(1.65)
125
(4.92)
8
(0.315)
13
(0.51)
1.5 inch
20 UN-2A
38
(1.5)
30
(1.18)
mm (inches)
Figure B-1: GP Regular Head
B.5 THE GPR AND GPS SENSING HEADS
The following sections cover the specifications and measurements of GPR
and GPS sensing heads. Included at the end of this section are lists of avail-
able accessories and options. For installation instructions, refer to Section B.7
B.5.1 GPR Head
The GPR is available in Standard Focus and Close Focus models. Use the fol-
lowing measurements when determining space requirements for installation.
The sensor is supplied with a fixed bracket and mounting nut. It can also be
mounted using a customer-supplied bracket or pipe adapter or other acces-
sories. (Accessories and options are listed at the end of this section.)
Note: All sensors and accessories are supplied with 3.8 cm (1 .5”) 20 UN machine
threads and must not be used with standard pipe fittings. A pipe adapter is
available for this purpose, if required. Make sure the inner diameter of any
pipe or tube extension is not so small that it interferes with the optical field of
view of the sensing head model being used.
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