Digital Pirani Gauge, Feature : Totally Indigenous

The Pirani Gauge head filament has high temperature co-efficient of resistance. So a slight change in system pressure brings about useful change in filament resistance resulting in an out of balance voltage which can be read as a pressure on meter. The Pirani Gauge head indicates the total pressure of combined gases and undesirable vapors in the system on the thread wire can loss heat to both gas and vapor molecules.