Geokon 6300, Instruction Manual, Page: 8 / 24

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1.1 Tilt Sensor Construction
The sensor comprises a pendulous mass which is supported by a vibrating wire strain gauge and
an elastic hinge (Figure 2). The strain gauge senses the changes in force caused by rotation of the
center of gravity of the mass. The mass and sensor are enclosed in a waterproof housing which
includes components for connecting the sensor to wheel assemblies and/or other sensors. The
wheel assemblies centralize the sensors and allow the assembly to be lowered into the casing.
Swivel joints are included to prevent the wheel assemblies from running out of the casing
grooves due to spiral problems. Stainless steel tubing is used to connect the transducer and wheel
assemblies together, and the whole string is normally supported from the top of the casing.
Biaxial systems use two transducers mounted at 90 ° to each other.
To prevent damage during shipment the tilt sensors are locked in place by means of a
locking clamp screw. This slotted-head clamp screw must be removed and replaced by a
Phillips-head seal screw, (provided in the zip-lock bag), to render the tiltmeter operative.
Figure 2 - Model 6300 Tilt Sensor