Applied where accuracy is required in the measurement of pressures below 10 psi and a bourdon tube cannot perform reliably. This instrument is highly sensitive yet durably constructed. Utilizing a thin wall capsule made of a long lasting copper alloy, the diaphragm senses slight pressure or vacuum and expands or contracts. The action of the element is quickly and accurately indicated within 1.5% of the full scale range.

Some of the applications are air conditioning and commercial heating equipment, leak testers, burner service, filtration and cooling systems.