Vision Temperature Gauge

310-010-002CVision Temperature Gauge
VDO Vision Temperature Gauge 120 Degree Centigrade.
12 Volt.
52 mm (Screw On Ring).

The temperature indicator applies the resistance measurement principle. A sensor containing a resistor with strong temperature dependence (PTC) converts the temperature of the fluid to a corresponding resistance value.

A turning magnet ratio measuring movement measures this resistance value. This value is displayed by a pointer moving over a dial graduated in temperature units. The turning magnet movement for ratio indication comprises three stationary coils wound at 90° against each other, and a rotating permanent magnet disk in these coils. The coils are connected to determine a ratio, so that the instrument is insensitive to on-board voltage fluctuations.

This means that the pointer travel is only determined by the magnitude of the current flowing through the measuring system.

A magnetic shield prevents effects of external magnetic fields, indication errors due to temperature changes are corrected by a compensating resistor. A dropping resistor is used to adapt the measuring movement to higher operating voltages (e.g. 24V).

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