Take a look at our Technical Notes on Temperature
The Geosense® VWTS 6000 vibrating wire temperature sensor is used primarily for the measurement of internal temperature in concrete structures, soil, rock or water.
The sensor operates on the principle that when plucked, a tensioned wire vibrates at its resonant frequency. The square of this frequency is proportional to the strain in the wire.
Around the wire is a magnetic coil which when pulsed by a vibrating wire readout or data logger interface plucks the wire and measures the resultant resonant frequency of vibration.
The sensor consists of a tensioned wire clamped inside a stainless steel cylinder. Changes in temperature cause the stainless steel body to expand and contract at a different rate to that of the vibrating wire thus altering the resonant frequency.
The thermal response of the VWTS 6000 is relatively slow and is therefore not suitable for measuring rapidly changing temperatures.
The VWTS 6000 vibrating wire temperature sensor is fitted with an internal gas-discharge tube for lightning protection.
|Operating temperature range||-20°C to +80°C|
|Operating frequency||2000 to 3500 Hz|
|Dimension||20mm diameter x 140mm long|
* Other ranges available