What is a glycerine pressure gauge?
A glycerine pressure gauge is a mechanical pressure instrument with a Bourdon tube, whose case is filled with glycerine. Media pressure deforms the curved tube. This deformation is transmitted via a pointer mechanism to the dial. The glycerine filling dampens rapid pointer movements and prevents internal fogging of the window. This keeps the reading steady even under pulsating pressure. A glycerine pressure gauge suits water, air, oil and other media compatible with stainless steel 1.4301. The design follows EN 837-1 for Bourdon tube pressure gauges.
63 mm vs. 100 mm pressure gauge — which diameter?
| Feature | MA103 – 63 mm | MA104 – 100 mm |
|---|---|---|
| Connection | G ¼ male thread, bottom | G ½ male thread, bottom |
| Display ranges | 0–2.5 / 4 / 6 / 10 / 16 / 25 bar | 0–2.5 / 6 / 10 / 16 / 25 / 40 / 60 / 100 bar |
| Readability | compact, close-range reading | large dial, readable from several metres |
| Typical use | compressors, pumps, hydraulics, panels | pipelines, boilers, pressure vessels, process plants |
| Case | stainless steel 1.4301 | stainless steel 1.4301 |
A 63 mm pressure gauge suits compact installations and measuring points at close range. A 100 mm pressure gauge offers a larger dial readable from several metres — the standard choice for pipelines and vessels in industrial plants.
Stainless steel pressure gauge — technical data MA103 & MA104
- Type: Bourdon tube pressure gauge, glycerine-filled
- Case: stainless steel 1.4301 (AISI 304)
- Diameter: 63 mm (MA103), 100 mm (MA104)
- Connection: male thread G ¼ (63 mm), G ½ (100 mm), bottom/radial, stainless steel
- Display range: 0–2.5 bar to 0–100 bar (9 steps)
- Window: polycarbonate
- Dial: white with black figures, unit bar
- Filling: glycerine (vibration and surge damping)
- Standard: EN 837-1
- Media: water, air, oil, gases, neutral liquids
Check media compatibility with stainless steel 1.4301 in our resistance check tool.
Choosing the right display range
For accurate and long-lasting pressure indication the operating pressure should sit in the middle third of the dial. For static pressure the rule of thumb is: full-scale value approximately 1.5 times operating pressure. For pulsating pressure or surges choose full-scale at approximately 2 times operating pressure. Example: a heating system at 4 bar gets a 0–6 bar gauge. A compressed air system at 8 bar gets a 0–16 bar gauge. A hydraulic line at 50 bar gets a 0–100 bar gauge. A gauge continuously run at full scale loses accuracy and service life.
Applications — heating, compressed air, water and industry
The Fergo glycerine pressure gauge is used in virtually every technical installation. In heating and sanitary systems the instrument shows system pressure at boilers, pumps and manifolds. In compressed air systems the 63 mm pressure gauge monitors line pressure at compressors and service units. In water supply and irrigation the 100 mm pressure gauge checks line pressure ahead of filters, sight glasses and control valves. In hydraulic and industrial systems up to 100 bar the stainless steel case delivers the required robustness. To isolate the gauge line we recommend a needle valve ahead of the pressure gauge — allowing the instrument to be replaced under pressure.
Pressure gauge in stock — EU-wide delivery
Fergo stocks all 18 pressure gauge variants for immediate dispatch. Standard shipping via DHL reaches customers across Europe within a few working days. Each instrument ships with a product datasheet. Further actuators and accessories for your valves are in the parent category.
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