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3.7 Supporting long sensor pipes, sagging
From a sensor measuring length of 1500 mm, the weight of the sensor can cause sagging of the sensor rod in horizontal cylinder mounting posi-
tion. Sagging does not affect the sensor function, since the sensor pipe is damped by the surrounding oil and lubricated when contacting the piston
rod. Generally, however, the following measures can be taken with long sensor rods:
Install a slide bushing at the end of the sensor rod (right figure). The pressure pipe is provided with a threaded port at the end. For assembling and
fixing the pressure pipe use corresponding srews. The maximum tightening torque for screws is 2.5 Nm (the screw property class must be taken
into account).
9.5
6
8.5
Spacing washers should be of non-magnetic, sliding material (e.g. polyamide) and dimensioned so that the inside diameter is smaller than the one
of the position magnet. A smaller inside diameter prevents the sensor rod from touching the magnet, thus protecting it against wear (see figures).
Another possible way to prevent the sensor rod from sagging is using slide bushings of non-magnetic material in the piston rod (see figure).
Magnet
Spacing washers
Magnet
Spacing washers
I
Slide bushing
9
I
Temposonics
MH Series
®
Installation Manual
Slide bushing
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