WIKA Model PGS21 Bourdon tube pressure gauge

$120.00

The WIKA PGS21 switchGAUGE combines a mechanical pressure gauge with one or two fixed electrical switch contacts, enabling local pressure reading and automatic switching when preset pressure thresholds are reached.

With a stainless steel case, IP65 protection and measuring ranges from 0–2.5 bar to 0–400 bar, it is suitable for pressure monitoring in tanks, hydraulic systems and industrial machinery. Switch points are factory-set according to application requirements.

🕑 Lead time: 6-8 weeks
Quantity:
Delivery & return Ask a Question
Visa PayPal Mastercard American Express

The WIKA PGS21 is a Bourdon tube pressure gauge with integrated switch contacts. It displays pressure on an analog dial and opens or closes an electrical circuit when the pointer reaches a preset switching point.

Key Features

  • Combined functions: Local pressure indication and electrical switching.
  • Configurable switch points: One or two fixed switching points, typically set between 10% and 90% of the scale range.
  • Durable construction: Stainless steel case with IP65 ingress protection.
  • Measuring range: Standard ranges from 0–2.5 bar to 0–400 bar.
  • Reliable operation: Designed according to EN 837-1, with optional liquid filling to improve vibration resistance.

Suitable Applications

  • Tank and gas cylinder monitoring: Detect pressure changes and help signal potential loss of contents.
  • Hydraulic systems: Trigger switching actions at defined pressure thresholds.
  • Industrial machinery: Support pressure-dependent control and monitoring.
  • General plant equipment: Provide a visible pressure reading alongside a switching signal.

Technical Highlights & Selection Considerations

Before ordering, confirm the pressure range, dial size, process connection and required switching points. The PGS21 is available in nominal sizes of 40, 50 and 63 mm. Standard accuracy class is 2.5, and a 1 m electrical cable is standard; alternative connections and configurations may be available.

Also confirm the contact type and electrical load compatibility. The PGS21 is a switch gauge, not a 4–20 mA pressure transmitter, so ensure your control system is designed to accept its switching contact output.

FAQ

Q1: Does the PGS21 require power to display pressure?
No. The analog dial works mechanically without electrical power. Power requirements depend on the connected switching circuit.

Q2: How many switch points can it have?
It supports one or two fixed switch points, factory-set to the customer's requirements.

Q3: Does it provide a 4–20 mA signal?
No. The standard PGS21 uses electrical switch contacts rather than a continuous analog output signal.

Q4: What measuring ranges are available?
Standard ranges extend from 0–2.5 bar to 0–400 bar, depending on the selected configuration.

Q5: What information should I provide when requesting a replacement?
Provide the full model or part number, pressure range, dial size, process connection, contact configuration and required switching points.

Design Standards & Mechanical Dimensions

Nominal Size (NS) Ø 40 mm (1½ in), Ø 50 mm (2 in), Ø 63 mm (2½ in)
Design Standards EN 837-1 (Bourdon tube pressure gauges)
DIN 16085 (Pressure gauges with electrical limit contact devices)
Selection and handling per technical information IN 00.05
Safety Design Level Safety level “S1” per EN 837-1 (with blow-out device)
Instrument Concept switchGAUGE combining local analog indication with electrical limit alarm switching

Materials & Construction

Case Material Stainless steel 1.4301 (304)
Movement Copper alloy
Window Material Polycarbonate (PC)
Special Application Versions Electronic pressure switch version (Model PGS25, data sheet PV 21.04);
VdS approved version for fire extinguishing systems (Models PGS21.040 & PGS21.050, data sheet SP 21.03)

Related Product