Combustible gas control card?
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I saw it in the sample of gas detectors; I’m not sure what it is There are also bimetallic thermometers with electrical contacts; what exactly are these electrical contacts?
An electrical contact is simply a contact point; when the temperature exceeds the set limit, this contact closes, thereby providing an alarm or enabling interlocking functions. Combustible gas control card? I don’t know what it means; it might be a SIM card.
Below is a combustible gas control card. A bimetallic thermometer with a live contact can automatically send a control signal to cut off the power supply or trigger an alarm when the industrial temperature exceeds a set value.