WIKA PGS21.100/160 Bourdon Tube Pressure Gauge

$120.00

The WIKA PGS21.100 / PGS21.160 switchGAUGE combines a mechanical pressure gauge with adjustable electrical switch contacts, allowing operators to read pressure locally and trigger alarms or control circuits at preset pressure thresholds.

Featuring a stainless steel case and 100 mm or 160 mm dial, it is designed for industrial process monitoring and equipment control. Up to three switch contacts can be installed, with electronic and reed contact options available for compatible PLC applications.

🕑 Lead time: 6-8 weeks
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The WIKA PGS21.100 and PGS21.160 are Bourdon tube pressure gauges with integrated electrical contacts. The pointer displays the actual pressure while adjustable contacts open or close an electrical circuit when the pressure reaches a defined set point.

Key Features

  • Dual function: Analog pressure indication and electrical switching.
  • Two dial sizes: 100 mm and 160 mm for different readability requirements.
  • Adjustable set points: Switch points can be adjusted across the scale range.
  • Multiple contact options: Magnetic snap-action, reed and electronic contacts, depending on configuration.
  • Industrial construction: Stainless steel case and design compliant with relevant pressure-gauge standards.

Suitable Applications

  • Industrial process control: Trigger switching actions when pressure reaches a preset limit.
  • Plant and equipment monitoring: Provide local readings and electrical status signals.
  • Pump and compressor systems: Support pressure-dependent alarms or control functions.
  • PLC-based automation: Use compatible electronic or reed contacts for signal input.

Technical Highlights & Selection Considerations

  • Measuring range: Available ranges extend from 0–0.6 bar to 0–600 bar, depending on the version.
  • Dial size: Choose 100 mm or 160 mm according to viewing distance and available installation space.
  • Contact configuration: Confirm the number of contacts, switching points and contact type.
  • Media compatibility: Intended for gases and liquids that are not highly viscous or crystallising and will not attack copper-alloy parts.
  • Accuracy and protection: The series has accuracy class 1.0 and standard IP54 protection; verify the exact datasheet for the selected version.

FAQ

Q1: What is the difference between PGS21.100 and PGS21.160?
The main difference is the dial size: 100 mm versus 160 mm. Select based on readability and installation requirements.

Q2: How many switch contacts can be installed?
Up to three contacts are listed on WIKA's product page. The available arrangement depends on the selected configuration.

Q3: Can it connect to a PLC?
Yes. Compatible electronic or reed contacts can be used with a suitable PLC input.

Q4: Does it provide a continuous 4–20 mA signal?
No. The PGS21 is a switch gauge with electrical contacts, not a continuous analog-output pressure transmitter.

Q5: What information is needed for a replacement?
Provide the full model or part number, pressure range, dial size, process connection, contact type and required switching points.

Measurement Performance & Operating Limits

Nominal Size (NS) Ø 100 mm (4 in), Ø 160 mm (6 in)
Accuracy Class Class 1.0
Scale Ranges 0 to 0.6 bar (0 to 8.7 psi) up to 0 to 600 bar (0 to 8,700 psi);
Vacuum and compound pressure ranges; Single or dual scale options (bar, psi, kPa)
Pressure Limitation Steady: 1.0 x full scale value
Fluctuating: 0.9 x full scale value
Short time overload: 1.3 x full scale value
Permissible Temperature Medium: up to +80 °C (+176 °F)
Ambient: -20 to +60 °C (-4 to +140 °F)
Temperature Effect Max. ±0.4% / 10 K of full scale value deviation from reference temperature (+20 °C)

Materials & Mechanical Construction

Wetted Materials < 100 bar: Copper alloy, C-type trumpet form
≥ 100 bar: Stainless steel 316L, helical coil type
Process Connection G ½ B, ½ NPT, M20 x 1.5 male (copper alloy); lower mount (radial) or lower back mount
Case & Bezel Ring Stainless steel with bayonet ring (unfilled dry case)
Movement Copper alloy with wear-resistant argentan parts
Dial & Pointers Aluminium dial (white with black lettering); Black aluminium instrument pointer; Red aluminium adjustable set pointer
Window Material Polycarbonate or Laminated safety glass
Ingress Protection IP54 per IEC/EN 60529

Electrical Alarm Contacts & Wiring

Electrical Connection Heavy-duty PA 6 black cable junction socket per VDE 0110 insulation group C / 250 V with M20 x 1.5 cable gland and integrated strain relief
Wiring Terminals 6 screw terminals + PE ground terminal (for wire cross-sections up to 2.5 mm²)

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