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Standard Helium Probe with Fischer 4-pin
Standard Helium Probe with Fischer 4-pin
Our Price: £870.00

The probe tube is manufactured from stainless steel and contains a superconductive wire. When an electric current flows, the portion of the wire above the liquid surface remains resistive while that below is superconducting. A measure of the voltage across the wire indicates the fraction of the wire above the surface. more info
Standard Nitrogen Probe with Fischer 3 pin connector
Standard Nitrogen Probe with Fischer 3 pin connector
Our Price: £1,260.00

The stainless steel probe tube is a coaxial capacitive sensor. The difference in dielectric constant between the liquid and gas enables the length of the probe beneath the liquid surface to be determined. The sensing circuitry is located in the probe head to avoid the effects of cable capacitance. more info