TEMP SENDER

SKU: 17H575

The temperature-sending unit in later British cars is a negative temperature coefficient device, i.e. as the temperature goes up, the resistance decreases allowing a greater current flow. This means that as the temperature of the engine increases, current flow through the gauge increases and the needle deflects towards hot. The temperature-sending unit and gauge in the Morgan +4 with Vanguard/Triumph engines, do not operate like this. First of all, notice that when the ignition is turned off, the temperature gauge reads maximum H. When the ignition is turned on, the gauge swings down to C and then works its way toward H as the engine warms up. To operate this way, the sending unit consists of a bi-metallic switch, with the switchblade wrapped with resistance wire. The switch contacts are closed when everything is cold. When the ignition is first turned on, current flows through the resistance wire, the switch contacts and the temperature gauge, causing the gauge to move to the C position.

CHF 228.25

excl. 8,1% VAT , plus

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