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Fischer Germany DA30 series differential pressure gauge for gases and liquid media
Fischer differential pressure gauge DA30 measures and indicates pressure and differential pressure. It is suitable to work with gaseous and liquid media not affecting the materials used. Electrical and electronic accessory components (KE...) enable limiting of signal and transmitting of measurement. Fields of Application
- Water treatment
- Level measurement
- Filter technics
- Flow measurement
Industries:
- process engineering
- plant engineering
- water economy
- pneumatic conveying systems
- Marine, shipping
- process industries
- paint, chemical
- oil & gas
- water treatment
- waste treatment
- sewage plant
- refrigerant
- automobile
Principles of Operation
The DA30 is based on a rugged and uncomplicated diaphragm movement, suitable for pressure and differential pressure measurements. Operating principle of system is identical for all applications of this type. In a state of equilibrium, forces of springs on both sides of the diaphragm are balanced. The pressure or differential pressure to
be measured creates an unbalanced force of springs for the measuring range until a new equilibrium is reached. When subjected to excessive pressure, the diaphragm rests on metal supporting plates. A centre-mounted torque rod transfers motion of the diaphragm system by an eccentric tilted axle through a torsional socket outwards.
The axle rotation is transmitted to the dial by a lever. Specifications:
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Measuring ranges
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0...160 mbar to 0...1.6 bar (see Ordering Code)
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Nominal pressure rating
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40 bar (max. static pressure)
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Accuracy
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± 1.6% FS
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Max. differential overpressure
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One-sided overpressure protected up to nominal pressure, on (+)- and (-)-side of diaphragm, partial vacuum protected
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Indicator
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Circular dial type, 100 mm or 160 mm diameter
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Max. ambient temperature
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-20°C to +80 deg C
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Max media temperature
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+80 deg C
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Temperature coefficient
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Approx. 0.3% / 10 degC
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Zero adjustment
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Screw through hole on top of dial housing. ± 25% FS.
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Protection class
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IP 65, per DIN EN 60529
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Electrical accessories
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Limit signalling contacts: slow-action / magnetic snap-action / non-contact
proximity type limit detector.
Pointer rotation transducer: capacitance type, with output signal
proportional to the pointer position
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Liquid filling
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For operating conditions involving vibration, pressure fluctuations, and/or
moisture condensation inside, the gauge can be supplied with glycerine or
silicone oil filling.
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Reference pointer
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Adjustable pointer for visual marking of limit / reference value.
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