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Diaphragm pressure gauges are preferably used for low pressure ranges. Through the large working surface of the circular, corrugated diaphragm element, small pressure ranges can be measured reliably.
The diaphragm pressure gauges are manufactured in accordance with EN 837-3. The robust design is particularly suitable for applications in machine building, plant construction and in the water and wastewater industry.
- Compatible with switch contacts.
- Process connection thread or open flange.
- Scale ranges from 0 … 16 mbar.
- EN 837-3
Nominal Size in mm
- Model 423.12: 2.5 (option 1.6)
- Model 422.12: 1.6
- or all other equivalent vacuum or combined pressure and vacuum ranges
- 0 to 400 mbar to 0 to 40 bar (flange Ø 100 mm)
- 0 to 16 mbar to 0 to 250 mbar (flange Ø 160 mm)
- Fluctuating: 0.9 x full scale value
- Steady: Full scale value
- 3 x full scale value, however max. 40 bar
- Storage: -40 ... +70° C (scale Ranges ≤ 60 mbar: -20 ... +70° C)
- Medium: +100° C maximum
- Ambient: -20 … +60° C
- When the temperature of the measuring system deviates from the reference temperature (+20° C): max. ±0.3 %/10 K of the span
Ingress Protection Per IEC / EN 60529
- Model 423.12: IP65 (with liquid filling)
- Model 422.12: IP54
Process Connection with Lower Measuring Flange
- Steel, lower mount, G ½ B (male), SW 27
- > 2.5 bar: Stainless steel 1.4568
- ≤ 2.5 bar: Stainless steel 1.4571
Pressure Chamber Sealing
- Copper alloy, wear parts argentan
- Aluminium, white, black lettering
- Aluminium, black
Case with Upper Measuring Flange
- Grey cast iron, black
- Instrument glass
- Bayonet ring, stainless steel, black
Filling Liquid (for Model 423.12)
- Glycerine 86.5 %
- For measuring points with increased overload
- The model 423.12 with liquid-filled case is suitable for high dynamic pressure loads and vibrations
- For gaseous and liquid media
- For mining, environmental technology, machine building and general plant construction
- With the open connecting flange option also for contaminated and viscous media