ĐỒNG HỒ ĐO CHÊNH ÁP CÓ TIẾP ĐIỂM ĐIỆN WIKA DPGS40

Applications

* Monitoring and control of filters, compressors and pumps for:
* Boilers and pressure vessels
* Drinking and cooling-water treatment plants
* Pressure-boosting and pumping stations
* Heating technology
* Fire-extinguishing systems
Special features
* With one or two adjustable microswitches
* Shatterproof window and robust aluminium or stainless steel measuring chamber for increased requirements
* Optionally with approvals for hazardous areas
* High ingress protection, IP65, for outdoor use and processes with high condensation
* Low measuring range from 0 ... 250 mbar
Specifications
Nominal size:
      Differential pressure display: Ø 100 mm
      Working pressure indication: Ø 22 mm
Window:
      Non-Ex version: Plastic, with plug screw for switch point setting
      Ex version: Plastic (switch point setting can only be carried out at the factory)
Case version: Display case, aluminium, EN AC-AI Si9Cu3(Fe); black painted
Type of measuring element:
      Differential pressure display: Measuring chamber with diaphragm and media chambers ⊕ and ⊖
      Working pressure indication: Without, Bourdon tube
Material:
      Measuring chamber: Aluminium, EN AC–Al Si9Cu3(Fe), black painted; Stainless steel 1.4571
      Diaphragm, sealings: FPM/FKM, NBR
Bourdon tube (working pressure indication): Copper alloy
Accuracy class:
      Differential pressure display: 2.5, 1.6 (only selectable for scale ranges from 0 ... 1 bar to 0 ... 10 bar)
      Working pressure indication :4
Repeatability: ≤ 1.6 % of measuring span
Temperature error: On deviation from the reference conditions at the measuring system: Max. ±0.8 %/10 K of end value of measuring range 
Reference conditions: Ambient temperature +20 °C [+68 °F]
Type of pressure: Differential pressure 
Special measuring ranges: Other measuring ranges on request
Unit: bar, psi, mbar, kg/cm², MPa, kPa
Process connections
Standard: EN 837, DIN EN ISO 8434-1
Size EN 837: 2 x G 1/4, female thread, centre distance 26 mm; 2 x G 1/4 B, male thread, centre distance 26 mm\
Size DIN EN ISO 8434-1: 2 x bite-type fitting for pipe ∅ 6 mm; 2 x bite-type fitting for pipe ∅ 8 mm; 2 x bite-type fitting for pipe ∅ 10 mm
Materials (wetted):
      Measuring chamber: Aluminium, Al Si9Cu3(Fe), black painted; Stainless steel 1.4571
      Process connection: Identical to measuring chamber (only 2 x G 1/4 female thread); Copper alloy; Stainless steel; Steel (only bite-type fittings)
      Diaphragm, sealings: FPM/FKM; NBR
Output signal: See datasheet
Electrical connections: See datasheet
Medium temperature: -10 ... +90 °C [14 ... 194 °F]
Ambient temperature:
      Non-Ex version: -10 ... +70 °C [14 ... 150 °F]
      Ex version: -10 ... +60 °C [14 ... 140 °F]
Storage temperature: -20 ... +60 °C [-4 ... +140 °F]
Pressure limitation:
      Steady: End value of measuring range
      Fluctuating: 0.9 x end value of measuring range
Overload safety: Max. 25 bar On one, both and alternatingly on the ⊕ and ⊖ sides
Ingress protection per IEC/EN 60529: IP65