Pressure instruments are devices used to measure pressures exceeding atmospheric pressure, primarily for applications involving liquids, gases, and steam. They encompass various types, such as Bourdon tube pressure gauges, vibrating-wire pore water pressure gauges, and piston-type pressure gauges. In recent years, advancements have been made in protective housing and connection technologies-for instance, the introduction of designs featuring protective casings and quick-connect fittings.
These instruments operate based on various principles, such as Bourdon tube deflection, vibrating-wire resonance, or piston displacement, and are characterized by key specifications including measurement range, accuracy class, dial diameter, and connection type. Proper installation, along with regular calibration and maintenance, is essential to ensure measurement accuracy.
