VW Temperature Sensor

Used for the measurement of temperature in rock, concrete and soil.

It consists of a stainless steel body, a tensioned wire, an electromagnetic coil and signal cable. The body of the sensor expands and contracts with changes in temperature, increasing or decreasing the tension of the wire.
When a readout is connected, it sends an electric pulse to the coil, which plucks the wire and causes it to vibrate at its natural frequency. A second coil picks up the vibration and returns a frequency to the readout. The reading is converted to units of temperature by applying calibration factors.

Features:

	High accuracy
	VW compatible: The VW temperature sensor is especially convenient when there are other VW sensors at the site.
	Manual or automatic readings: Read manually using the VW Data Recorder or automatically using a data logger.
	Reliable signal transmission over long distances