WIKA Pressure Gauge Selection & Range Chart — Type 232.50 / 233.50

Reference manual hosted for technician access. 1 pages.

Brand

WIKA

Equipment

316 SS Bourdon pressure gauge

Document type

Selection chart

Revision

WIKA PM 02.03 / PM 02.04

Issued

2026-07-05

Pages

Format

PDF (application/pdf)

WIKA Type 232.50 (dry) and Type 233.50 (glycerin-filled) 316 SS Bourdon pressure gauge selection chart: pressure range 0–1 bar through 0–1000 bar plus vacuum and compound ranges, digit stepping, EN 837-1 accuracy Class 1.0, preferred model and typical service. Includes rules for the working point (60–75 % of full scale), case sizes (63 / 100 / 160 mm), connection (G 1/4 B to G 1/2 B), when to fill, when to snub.

WIKA Pressure Gauge Selection & Range Chart — Type 232.50 / 233.50

A pressure gauge is selected against three things: (a) the pressure range and preferred working point, (b) the media wetted-part material and the service environment (vibration, pulsation, chemistry), and (c) the case size and connection to fit the installed thread pot and readable at the required distance. The WIKA Type 232.50 (dry) and Type 233.50 (glycerin-filled) are the industrial workhorses — 316L stainless wetted parts, EN 837-1 accuracy class 1.0, case sizes 63 / 100 / 160 mm, IP65.

Range	Digit	Class	Preferred type	Typical service
0–1 bar	0.02 bar	1.0	PG23LT stainless preferred	Diaphragm gauge — capsule on very low ranges.
0–1.6 bar	0.02 bar	1.0	Type 232.50	Standard Bourdon; lowest 232.50 range.
0–2.5 bar	0.05 bar	1.0	Type 232.50	General-service water, air, oil.
0–4 bar	0.1 bar	1.0	Type 232.50	Compressed-air distribution.
0–6 bar	0.1 bar	1.0	Type 232.50	Cooling-water headers.
0–10 bar	0.2 bar	1.0	Type 232.50	Hydraulic return.
0–16 bar	0.5 bar	1.0	Type 232.50	Steam headers, ballast systems.
0–25 bar	0.5 bar	1.0	Type 232.50 / 233.50	General industrial.
0–40 bar	1 bar	1.0	Type 232.50 / 233.50	Working-line hydraulics.
0–60 bar	2 bar	1.0	Type 233.50 glycerin	Vibrating service — filled gauge.
0–100 bar	2 bar	1.0	Type 233.50 glycerin	Hydraulic power packs.
0–160 bar	5 bar	1.0	Type 233.50 glycerin	Refinery hydraulic.
0–250 bar	10 bar	1.0	Type 233.50 glycerin	Hydraulic tool / press.
0–400 bar	10 bar	1.0	Type 233.50 glycerin	Hydraulic jack, punch.
0–600 bar	20 bar	1.0	Type 233.50 glycerin	HP test bench.
0–1000 bar	20 bar	1.0	Type 233.50 glycerin	HP test bench, wire-rope test.
−1…0 bar	0.02 bar	1.0	Type 232.50 vacuum	Vacuum service.
−1…+1.5 bar	0.05 bar	1.0	Type 232.50 compound	Suction lines.
−1…+5 bar	0.2 bar	1.0	Type 232.50 compound	Refrigeration low-side.

Selecting the right range

Working point at 60–75 % of full scale (EN 837-1 §5.4). Running at 90–100 % fatigues the Bourdon fast; at 20–30 % the pointer resolution is wasted.
Case size — 63 mm for panel + skid under 1 m, 100 mm for standard machinery, 160 mm for wall / column reads > 3 m.
Filling (glycerin) — spec Type 233.50 for pumps, engines, hydraulic power packs and pulsating lines; the filled case stops needle chatter.
Connection — G 1/4 B for 63 mm cases, G 1/2 B or 1/2 in NPT for 100/160 mm.
Snubber — spec a needle valve or sintered snubber between the tap and the gauge on any diesel-driven or reciprocating-pump line, even filled.
Accuracy — Class 1.0 is the industrial default. For calibration test benches use Class 0.6 (Type 233.30) or Class 0.25 (Type 332.50 digital).

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Document provided as a reference for technicians servicing installed equipment. Trademarks and copyright remain the property of WIKA. Consult WIKA or your service representative for the current revision before performing any maintenance or warranty work.