TC Fluid Control has now built even higher levels of performance into its new generation of liquid level transmitters based on the magnetostrictive principle..
Reliability is a key benefit and these new transmitters will read to the highly accurate level of ± 0.8mm. This is continuous high accuracy measurement which goes beyond standard monitoring requirements to those required for inventory.
Easy to calibrate with push button operation and LCD display, the magnetostrictive gauges are not affected by high temperatures, shocks, vibration, vacuum or foaming contents. The housing is stainless steel, so no corrosion – especially appropriate for off-shore and food environments.
Other features include a float failure alarm, no media contact, remote display and control, screw or flange fittings and an option to be supplied with or without HART communications.
Magnetostriction is the change in the dimensions of a material when subjected to a magnetic field.
The measuring process begins with a current impulse. This current generates an axial magnetic field along the length of the wire made of magnetostrictive material. The float, which sits on the liquid surface, is fitted with permanent magnets. When the pulse reaches the float the two magnetic fields interact and a torsional force results.
A torsional stress wave is induced the wave. A pick-up in the electronics housing at the end of the wire converts this into an electrical signal. By measuring the elapsed time it is possible to determine the start point of the torsional stress wave and therefore the float position with a high degree of accuracy.
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