Macro Sensors (Pennsauken, NJ) offers the BBP Series air extended, spring-loaded LVDT position sensors to measure range of motion in pneumatic cylinders. The 3/8 "-diameter, pencil-type gaging probes measure the position of a target surface. They feature a probe that moves out and makes measurements only near the very end of the probe movement when it is almost fully extended, and then retracts so the probe gets out of the way of damage.

The sensors utilize a linear ball bearing assembly precisely fitted to a hardened-andground, non-rotating probe shaft to minimize radial play and the effects of side loading. This results in the probes’ repeatability of 0.000006" (0.15 μm). The other end of the shaft is internally threaded to accept an interchangeable tungsten carbide contact tip. The units are available in three standard ranges: +0.040" (+1.0 mm), +0.100" (+2.5 mm), and +0.200" (+5.0 mm).

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