Pressure gauges are the cheapest instrument on the plant and the one that fails most often, usually because the wrong variant was fitted. Three choices decide it: whether the line vibrates, whether the medium attacks brass, and whether the gauge has to switch something.
For pumps, compressors and any line with pulsation, a glycerine-filled gauge with a restrictor screw damps the needle and stops the movement wearing out in a few months. For corrosive media, ammonia, food or viscous products, a diaphragm seal separates the gauge from the medium and the wetted parts become SS316, PTFE or Hastelloy instead of brass. For alarms and interlocked pumps, an electrical contact gauge gives a dry contact at a set point, which is often cheaper than a separate switch.
Dials come in 60, 100 and 150 mm with ranges from 0-0.1 MPa to 0-100 MPa, plus vacuum and compound ranges. Bodies are steel painted or SS304, connections M20x1.5, G1/2 or 1/2 NPT. Where the medium runs above 80 C a siphon or a cooling tower is fitted between the line and the gauge, and where pressure spikes a snubber is added; both are supplied with the gauge rather than sourced separately.
- 60 / 100 / 150 mm dials, 0-0.1 MPa to 0-100 MPa plus vacuum and compound ranges
- Accuracy class 2.5 / 1.6, class 1.0 on request
- Dry, glycerine or silicone filled; restrictor screw and snubber available
- Brass or SS316 connection, steel or SS304 case, glass or polycarbonate window
- Diaphragm seal for corrosive, viscous or hygienic media; electrical contact version for alarms
Standard gauges ship in 10-15 days including diaphragm seal assemblies. Send the range, the dial size, the thread and the medium and we will confirm the variant and price the same day.
