Differential pressure gauge for the process industry, all-metal media chamber
- Differential pressure measuring ranges from 0 … 16 mbar to 0 … 40 bar or 0 …10 inH2O to 0 … 600 psi
- High operating pressure and high overload safety up to 40 bar [600 psi]
- Models 732.31 and 733.31: Case with safety level “S3” per EN 837
- All-welded media chamber
- QR code on dial links to instrument-specific information
- Responsive after-sales service / Customizable /
- High quality / One-year warranty
- The image is for reference; the actual product willbe based on your custom specifications.
Description
These differential pressure gauges are made of highly corrosion-resistant stainless steel and feature an all-metal media chamber to ensure long-term leak tightness (no elastomer sealing elements).
A high overload safety is achieved by the all-metal construction and the close-fitting design of the diaphragm measuring element.
The use of high-quality stainless steel materials and the robust design are geared to applications in the chemical and process engineering industries. Thus the instrument is suitable for liquid and gaseous media, also in aggressive environments.
The low-temperature version POLARgauge® allows operation with ambient temperatures down to -70 °C [-94 °F].
Cases with safety level “S3” are fitted with a non-splintering window, a solid baffle wall between measuring system and dial and a blow-out back. In the event of a failure, the operator is protected at the front side, as media or components can only be ejected via the back of the case.
The QR code on the dial allows instrument-specific information such as the serial number, the order number, certificates and other product data to be retrieved from the internet easily and in the long term.
Specifications
| Connection location | ■Lower mount (radial) ■Side connection locations (right, left, front, back) on request. |
|---|---|
| Nominal size | ■Ø 100 mm [4"] ■Ø 160 mm [6"] |
| Scale ranges | 0 ... 16 mbar to 0 ... 40 bar or 0 ...10 inH2O to 0 ... 600 psi |
| Accuracy | ■1.6 ■1.0 ■2.5 |
| Process connection | Standard ■EN 837-1 ■ANSI/B1.20.1 → For valve manifolds for an instrument hook-up, see “Accessories and spare parts”. Size EN 837-1 ■2 x G ¼, female thread ■2 x G ½ B, male thread ANSI/B1.20.1 ■2 x ¼ NPT, female thread ■2 x ½ NPT, male thread Restrictor ■Without ■∅ 0.6 mm [0.024"], stainless steel ■∅ 0.3 mm [0.012"], stainless steel Material (wetted) Media chambers with process connection: Stainless steel 1.4571 (316 Ti) Venting of the media chambers: Stainless steel 1.4571 (316 Ti) Diaphragm element Span ≤ 0.25 bar [100 inH2O]: Stainless steel 1.4571 (316 Ti) Span ≥ 0.4 bar [160 inH2O]: ] NiCr alloy (Inconel) Bellows Stainless steel 1.4571 (316 Ti) |
| Case | Design ■Safety level “S1” per EN 837-1: With blow-out device ■Safety level “S3” per EN 837-1: With solid baffle wall and blow-out back Material ■Stainless steel 1.4301 (304 SS) ■Stainless steel 1.4571 (316 Ti) Case filling ■Without ■Glycerine-water mixture ■Silicone oil Instruments with case filling with compensating valve to vent and reseal case. |
| Window | ■Laminated safety glass ■Polycarbonate |
| Dial | Scale layout ■Single scale ■Dual scale Scale colour Single scale: Black Dual scale: Black/red Material Aluminium Customer-specific version ■Without ■With special scale, e.g. linear pressure or square root incrementation Other scales, e.g. with red mark, circular arcs or circular sectors, on request → Alternatively, adhesive label set for red and green circular arcs; see data sheet AC 08.03 |
| Pointer | Instrument pointer With case filling: Standard pointer, aluminium, black Without case filling: Adjustable pointer, aluminium, black Mark pointer/drag pointer ■Without ■Red mark pointer on window, adjustable ■Mark pointer on bayonet ring, adjustable ■Red drag pointer on window, adjustable |
| Movement | Stainless steel |
| Filling liquid | ■Without ■Glycerine-water mixture ■Silicone oil |
| Ambient temperature | ■-20 ... +60 °C [-4 ... +140 °F] ■-40 ... +60 °C [-40 ... +140 °F] 1) ■-70 ... +60 °C [-94 ... +140 °F] for low-temperature version POLARgauge |
| Medium temperature | ■-20 ... +100 °C [-4 ... +212 °F] ■-20 ... +120 °C [-4 ... +248 °F] ■-20 ... +150 °C [-4 ... +284 °F] |
| Ingress protection per IEC/EN 60529 | ■ IP54 ■ IP65 ■ IP66 |
