WIKA WIKA switchGAUGE PGS23
WIKA stainless steel Bourdon tube pressure gauges with adjustable electrical contacts, in 63, 100 and 160 mm diameters, for signalling and process control.
PGS23 is the WIKA Bourdon tube pressure gauge in 316L stainless steel that shows pressure on the dial and at the same time closes or opens an electrical circuit when the pointer passes the set threshold. The threshold is adjustable over the whole scale, with a removable key inserted through the window, and the indicating pointer moves freely, independent of the setting. Four contact types are available: magnetic snap-action (821), inductive (831, usable in hazardous areas, with a control unit), electronic (830 E) and reed (851); to drive a PLC directly, the electronic contact or the reed contact is used. The instrument is built to DIN 16085 and EN 837-1.
PGS23.063 has a nominal size of 63 mm, at most 2 contacts and accuracy class 1.6. PGS23.100 and PGS23.160 are 100 and 160 mm, with up to 3 contacts, class 1.0 or 2.5 and, optionally, a case filled with M50 silicone oil for heavy dynamic loads or vibration. PGS26 is the version with Monel 400 wetted parts. For a quotation we need the nominal size, the measuring range, the process connection, the number and type of contacts, the function of each (normally open, normally closed or changeover) and whether the instrument will be installed in a hazardous (explosive) area. When the item is available locally or at the supplier, delivery takes 24–72 h, and for made-to-order items usually 1–4 weeks.
Models and codes
| Code | Note |
|---|---|
| PGS23.063 | Pressure gauge with contacts, stainless steel, nominal size 63 mm, at most 2 contacts (reed: only one), class 1.6. |
| PGS23.100 | Nominal size 100 mm, up to 3 contacts (reed: at most 2), class 1.0 or 2.5. |
| PGS23.160 | Nominal size 160 mm, up to 3 contacts (reed: only one). |
| PGS26 | Bourdon tube and process connection in Monel 400 (2.4360), in 63, 100 and 160 mm diameters. |
| 821 | Magnetic snap-action contact: no control unit and no power supply, direct switching up to 250 V, 1 A. |
| 831 | Inductive contact, for hazardous areas, with the matching control unit (model 904.xx). |
| 830 E | Electronic contact, for direct control of a PLC. |
| 851 | Reed contact: no power supply, direct switching up to 250 V, 1 A; also suitable for a PLC. |
Key specifications
| Nominal sizes | 63, 100 and 160 mm |
|---|---|
| Measuring ranges | 63 mm: 0…4 up to 0…400 bar; 100 and 160 mm: 0…0.6 up to 0…1,600 bar; vacuum and compound ranges up to -1…+30 bar |
| Accuracy class (EN 837-1) | 1.6 at 63 mm; 1.0 or 2.5 at 100 and 160 mm |
| Wetted materials (PGS23) | stainless steel 1.4404 (316L) |
| Medium temperature | 63 mm: -20…+100 °C; 100 and 160 mm: -20…+200 °C unfilled, -20…+100 °C with silicone oil |
| Ambient temperature | -20…+60 °C |
| Ingress protection | IP54 at 63 mm; IP65 or IP66 at 100 and 160 mm |
| Ex approval (only with inductive contact 831) | ATEX II 2G Ex ia IIC T6/T5/T4 Gb and II 2D Ex ia IIIB T135°C Db; IECEx |
WIKA data sheets PV 22.03 (PGS23.063, edition 04/2025) and PV 22.02 (PGS23.100 and PGS23.160, edition 01/2025) list the series, with no announcement of withdrawal from production.
Frequently asked questions
Can a PGS23 be installed in a hazardous (explosive) area?
Yes, only in the version with inductive contact 831, with the optional ATEX approval II 2G Ex ia IIC T6/T5/T4 Gb for gases and II 2D Ex ia IIIB T135°C Db for dust, and with the matching control unit. The Ex approval is an option, so you specify it when ordering.
Which contact do you choose to drive a PLC?
The electronic contact 830 E or the reed contact 851. The magnetic contact 821 and the reed contact switch directly up to 250 V, 1 A, without a control unit and without supply voltage.
What data should we send you for a replacement PGS23?
The instrument code or the order number (for 100 and 160 mm you can also find them through the QR code on the dial), the nominal size, the measuring range, the process connection, the number and type of contacts and the switching thresholds. If the old instrument has fixed or sealed contacts, the thresholds must be specified when ordering.
Other WIKA series
We do not adjust the contact thresholds on site and do not carry out installation; we quote the pressure gauge by code and by the technical data of the requested version.
Updated: 2026-11-12