ĐỒNG HỒ ĐO ÁP SUẤT CÓ TIẾP ĐIỂM ĐIỆN WIKA PGS21.050

Applications

* Display and monitoring of vessel pressure and for alerting the loss of contents from the vessel

* General industrial applications

* Machine building and general plant construction

Special Features

* High switching reliability and long service life

* Switch contacts fixed to customer requirements

* Increased ingress protection, IP65

* Scale ranges from 0 ... 2.5 to 0 ... 400 bar [0 ... 60 to 0 ... 6,000 psi]

Specifications
Standard
Bourdon tube pressure gauges: EN 837-1
Pressure gauges with electrical limit contact devices: DIN 16085
Nominal size (NS): Ø 40 mm [1 1/2"], Ø 50 mm [2"], Ø 63 mm [2 1/2"]
Further version: 
      Bourdon tube pressure gauge with electronic pressure switch; model PGS25; data sheet PV 21.04
      Bourdon tube pressure gauge with switch contact, with VdS approval; models PGS21.040 and PGS21.050; data sheet SP 21.03
Window: Polycarbonate (PC)
Case Design: Safety level “S1” per EN 837-1: with blow-out device 
Case Material: Stainless steel 1.4301 (304)
Movement: Copper alloy
Measuring element:
      Type of measuring element: Bourdon tube, C-type or helical type
      Materials (wetted): Copper alloy
      Leak tightness: Helium tested, leakage rate: < 5∙10-5 mbar l/s
Accuracy class: 2.5 per EN 837-1; 1.6 per EN 837-1
Switching accuracy: ±2.5 % of span; ±4 % of span

Temperature error: On deviation from the reference conditions at the measuring system: ≤ ±0.4 %/10 K of respective full scale value 
Reference conditions: Ambient temperature +20 °C
Further details on: scale ranges
Unit: bar, psi, kg/cm², MPa, kPa Other units on request
Dial Scale layout: Single scale, Dual scale 
Dial Scale colour: Single scale - Black 
                               Dual scale - Black/red
Dial Material: Aluminium
Customer-specific version: →Other scales, e.g. with red mark, circular arcs or circular sectors, on request
Instrument pointer:
      Magnetic snap-action contact: Plastic, black
      Reed switch: Aluminium, black 
Set pointer: Plastic, red (only for magnetic snap-action contact)
Process connection
Standard: EN 837, ANSI/B1.20.1, ISO 7
Size EN 837-1: G 1/8 B, male thread; G 1/4 B, male thread; M10 x 1, male thread 
Size ANSI/B1.20.1: 1/8 NPT, male thread; 1/4 NPT, male thread 
Size ISO 7: R 1/8, male thread; R 1/4, male thread 
Materials (wetted) 
      Measuring element: Copper alloy
      Process connection with lower measuring flange: Copper alloy
Output signal: Magnetic snap-action contact → See datasheet
Electrical connection → See datasheet
Operating conditions
Medium temperature range: ≤ +60 °C [+140 °F]
Ambient temperature range: -20 ... +60 °C [-4 ... +140 °F]
Storage temperature range: -40 ... +70 °C [-40 ... +158 °F] Pressure limitation:
      Steady: 3/4 x full scale value
      Fluctuating: 2/3 x full scale value
Ingress protection per IEC/EN 60529: IP65