Function: Gauges allow measurement of pressure / vacuum / temperature. Many are for general purpose measurement, though some applications will require calibration/certification.
Explanation: General purpose pressure gauges use a curved tube which straightens slightly when pressurised. Gearing mechanisms turn a pointer over a scale. Common temperature gauges use a bi-metallic method to turn a pointer.
Typical Use: Measurement which shows the correct operation of pumps/filters etc, or indicates a fault/maintenance due.
Cautions: Avoid overheating pressure gauges (use a ‘pigtail’ for protection). Avoid vibration of the needle (choose liquid-filled gauges). Best calibration when working pressure is at mid-scale. Vent liquid-filled gauges once installed to improve accuracy.
