Ultra-Thin Telemetry Collar

The Ultra-Thin Telemetry Collar houses all of the electronics needed to provide a precision radio frequency link from sensors mounted on rotating shafts, reciprocating rods or other moving machinery to stationary data acquisition and display instruments.

Induction Powered
Power is supplied to the transmitter inductively for continuous, non-interrupted measurements. No batteries are required because the induction power supply delivers power through a stationary loop antenna to a rotating antenna. The rotating loop antenna and induction power converter are embedded into the Ultra-Thin Collar assembly. Single piece and split collars are available in most any size, to clamp or bolt to any shaft.

Transmitters
Transmitters are available for transmitting signals from accelerometers, RTDs, strain gages, thermocouples, thermistors or any other current or voltage type transducer or sensor. The miniature transmitters incorporate a crystal oscillator that is tuned to an exact frequency, eliminating the need for tuning by the end user. Transmitter frequencies can be staggered allowing multiple transmitters to be operated in close proximity with no interference. This allows for multi-channel systems or multiple systems to function within the same area. The transmitter modulates the sensor signals onto a RF carrier and transmits them to a stationary receiver.

Receivers
The receiver demodulates the signal and converts it to a ±2, ±5, ±10VDC or 4-20mA analog output. The wide band analog output provides frequency response from DC to 1100Hz. A second optional filtered output, set to any desired frequency, is available for maximum signal stability. The receivers also remotely activate the transmitter’s Bipolar Shunt Calibration feature.

Half_Shaft_Ultra_Thin_09.pdf