Product Range
Bellow Differential Pressure Gauges
The pressure element of these instruments has two S.S.316 bellows, balance mounted. The value shown on the dial is the difference between two input pressure or depressions coming in to each bellow. 'MASS' Differential Pressure Gauges are entirely made of S.S.316 wetted parts, therefore they offer the same corrosion resistance (inside and outside) as the Bourdon Pressure Gauges. Moreover the mechanical resistance of the bellows allows important one-sided overpressure, compare to the differential pressure (up to 20 times in some cases).

All differential pressure gauges are used for measurements of flow, level, filter clogging, pressure drop measurement, air conditioner & chemical processor.


Delta P

Maximum static

60 mbar not on the full scale

4 bar

100 mbar to 200 mbar

4 bar

200 mbar to 500 mbar

6 bar

350 to 1.6 bar

20 bar MAXIMUM

1.2 to 6 bar

40 bar

6 to 12 bar

100 bar

Optional Features :
  • Adjustable micrometer pointer
  • Window Plexiglass or safety glass
  • Anti vibrations filling liquids. Glycerin or silicone oil.
  • Oil free manometric parts for oxygen service.
  • Special threaded or flanged connection.
  • Other dial graduations: linear, square root, flow, level, '0' at center.
  • Electric contacts.
  • Diaphragm seals of different materials.
Specification :
Dial Size 150mm
Bellows S.S 316L Argon arc-welded
Connections S.S 316L Arc-welded on the case, both connections are parallel in vertical direction.
45° & Back connection can be provided on request.
Connection size 1/2" BSP / Extra swil adapters for manifold connection or any standard connection can be provided on request
Case & Bezel Stamped S.S. 304, 1 mm thick, Snap action bayonet ring ensures the perfect sealing of the case. (Weather Proof class IP-55 & 65)
Movement All S.S. balance, welded frame, swiveling by means of flexible blades, S.S. accurate magnifying movement.
Window Toughened glass / Safety glass
Blowout Rubber disc
Accuracy ± 2% of full scale / ± 1.6% of full scale
-25 to 65 °C
Process fluid : max. 100 °C.
For higher temperature cooling tower assembly is required.

- For static pressure more then 10 times of pressure range, please consult us.
- Single & Double Diaphragm Differential pressure gauge are also available.

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