The Vibrating Wire Temperature Sensor comprises a stainless steel body which houses a vibrating wire sensing unit. The sensing unit incorporates a stainless steel mounting body for the carbon steel vibrating wire and coil assembly.

The vibrating wire tension changes with temperature due to the difference in coefficients of expansion of the two materials.

The mode of operation is by plucking or swept oscillation of the vibrating wire. The wire, vibrating at its resonant frequency, which is relative to the tension in the wire, induces an alternating current in a coil which is detected by the readout unit. In this way the period of oscillation is accurately measured. Readings are made by measuring the elapsed time for 100 cycles. The readout then displays the information in engineering units. Frequency throughout the temperature range is approximately from 2000 Hz to 3000 Hz.

Accurate, robust, high resolution and good long term stability.
Readings unaffected by cable length.
Capable of withstanding thermal shocks without impairing performance.
Outer body manufactured from 316 stainless steel.
Over voltage surge arrestors fitted to protect against electrical damage.
Connecting cable is strong, screened and flexible and can be used in lengths in excess of 1000m.
Suitable for remote reading, scanning and data logging.
Thermal mass requires approximately 10 minutes to achieve steady state reading.
Upper temperature limit determined by cable, lower limit by internal potting.

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