2. Product Overview
  3. Differential pressure gauges
  4. Differential pressure gauges with bellow
  5. M31
Technical data
Housing
Nominal size
  • 150 mm
Case material
  • Stainless steel 1.4301 / AISI 304
  • Stainless steel 1.4404 / AISI 316L, optional
Bezel ring material
  • Stainless steel 1.4301 / AISI 304
  • Stainless steel 1.4404 / AISI 316L, optional
Window material
  • Polycarbonate
Window gasket
  • Elastomer
Protection rating (EN 60529)
  • IP65
Dial
  • White, Aluminium
Pointer
  • Black, Aluminium
Movement material
  • Stainless steel
Temperature
Ambient temperature
  • -20°C ... +70°C
Storage temperature
  • -20°C ... +70°C
Media temperature
  • -40°C ... +200°C
Wetted parts
Process connection material
  • Stainless steel 1.4404 / AISI 316L
Bellow
  • Stainless steel 1.4404 / AISI 316L
Performance
Accuracy
  • ± 3 % FS
Min. measuring range
  • 0 ... 0.25 bar
Max. measuring range
  • 0 ... 25 bar
Thermal drift (reference: +20 °C)
  • ± 0.3 % FS/10K
Electrical data
Number of setpoints
  • 1 or 2
Type of contact
  • Sliding contact
Contact material
  • Silver-Nickel alloy, gold plated (Ag80Ni20)
Max. load of contact
  • 250 V / 0.6 A / 10 W / 18 VA
Min. pressure for 1 contact
  • 0 ... 250 mbar
Min. pressure for 2 contacts
  • 0 ... 250 mbar
Downloads
Data sheet
Operating Manual

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