SENSOR PROBE INSTALLATION
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McCrometer. Any published technical data and instructions are subject to change without notice. Contact your McCrometer
representative for current technical data and instructions.
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Figure 20. Sensor Load Indicators Figure 21. Compression Seal Bolts
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IMPORTANT
Do not overtighten the compression seal as it may cause damage to the seal itself.
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Compression
Seal
Compression
Seal Bolt
And Nut
STEP 12: Applying A Compression Load To The Sensor
A compression load is required to be applied at the top of the sensor forcing the bottom of the sensor to seat rmly
against the far wall of the pipe. The amount of load is indicated by the three lines etched into the top plate and the
location of the set screw relative to the lines. See Figure 20 and the table below.
Set Screw Location Compression Load Recommended Use
At the lowest line 300 lbs. Low pressure plastic pipes
Between the lowest line
and the middle line
450 lbs. Low pressure metal pipes
Between the top line
and the middle line
Consult Factory
Applications other than low pressure. Consult factory before
applying a compression load greater than 450 lbs.
For applications other than low pressure the sensor load should be increased. Consult factory for the appropriate
loading for your application before applying a compression load greater than 450 lbs.
Follow the steps below to apply a compression load to the sensor:
1. Rotate the two captive nuts on the top plate simultaneously and evenly until the proper load is indicated by
the set screw's relationship to the lines etched on the top plate. See Figure 20.
IMPORTANT
If using the Insertion Tool, rotate the two captive nuts using only the low gear shaft until the proper load
is indicated. DO NOT use the high gears on the insertion tool as this may create too much load too fast
and damage the sensor or the pipe.
2. Tighten the compression seal bolts and nuts just enough to stop any leaking from the seal. See Figure 21.
300 lbs.
450 lbs.
Other
than low
pressure
Low pressure metal pipes
Low pressure plastic pipes
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