# Diaphragm pressure gauge — 422.12

> Diaphragm pressure gauge with grey cast iron case, suitable for low pressure ranges and applications in machine building, plant construction, and water and wastewater industry.

- Catalog code: 422_12_423_12
- Model: 422.12
- Category: Pressure measurement › Pressure gauges
- Product page: https://avigan.com.ua/wika/en/products/422_12_423_12
- Price: on request
- Supplier: AVIGAN (TOV VIKA Prylad), official WIKA partner in Ukraine

## Overview

Diaphragm pressure gauges are preferably used for low pressure ranges. Through the large working surface of the circular, corrugated diaphragm element, small ...

## Applications

- For measuring points with increased overload
- The model 423.12 with liquid-filled case is suitable for high dynamic pressure loads and vibrations
- For gaseous and liquid media
- For mining, environmental technology, machine building and general plant construction
- With the open connecting flange option also for contaminated and viscous media

## Special features

- Compatible with switch contacts
- Threaded or open flange process connection
- Scale ranges from 0 … 16 mbar

## Specifications

| Parameter | Value |
|---|---|
| model | 422.12 |
| product family | 422 |
| short description | Diaphragm pressure gauge with grey cast iron case, suitable for low pressure ranges and applications in machine building, plant construction, and water and wastewater industry. |
| subcategory | Diaphragm pressure gauge |
| certifications | GOST; MTSCHS; BelGIM; UkrSEPRO; Uzstandard; CPA; CRN; KazInMetr |
| ambient temp | -20 … 60 °C |
| ip rating | IP54 |
| weight kg | 3.4 |
| languages in datasheet | en; de |
| pressure ranges | 0 … 16 mbar; 0 … 250 mbar; 0 … 400 mbar; 0 … 40 bar |
| accuracy class | 1.6 |
| accuracy standard | EN 837-3 |
| process connections | G ½ B; G ½ B (male) |
| case material | Grey cast iron |
| wetted parts material | Stainless steel 1.4571; NiCr alloy (Inconel); Copper alloy; argentan; stainless steel |
| sealing material | NBR |
| dial size mm | 100 |
| process temp | 10 … 100 °C |

## Datasheet tables

| Logo | Description | Country |
|---|---|---|
|  | GOST (option) Metrology, measurement technology | Russia |
|  | KazInMetr (option) Metrology, measurement technology | Kazakhstan |
| - | MTSCHS (option) Permission for commissioning | Kazakhstan |
|  | BelGIM (option) Metrology, measurement technology | Belarus |
|  | UkrSEPRO (option) Metrology, measurement technology | Ukraine |
|  | Uzstandard (option) Metrology, measurement technology | Uzbekistan |
| - | CPA Metrology, measurement technology | China |
| - | CRN Safety (e.g. electr. safety, overpressure, ...) | Canada |

| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| NS | Scale range | Dimensions inmm | Weight |  |  |  |  |  |  |  |  |
|  | in bar | d | a | b | D₁ | D₂ | e | G | h ±2 | SW | in kg |
| 100 | ≤ 0.25 | 160 | 15.5 | 49.5 | 101 | 99 | 17.5 | G½B | 135 | 27 | 3.4 |
| 160 | ≤ 0.25 | 160 | 15.5 | 49.5 | 161 | 159 | 17.5 | G½B | 165 | 27 | 4.3 |
| 100 | > 0.25 | 100 | 15.5 | 49.5 | 101 | 99 | 17.5 | G½B | 135 | 27 | 2.1 |
| 160 | > 0.25 | 100 | 15.5 | 49.5 | 161 | 159 | 17.5 | G½B | 165 | 27 | 3.0 |

## Documents

- [ds_pm0402_en_co_2a0d12](https://avigan.com.ua/wika/docs/wika/ds_pm0402_en_co.pdf) — PDF, 395 KB, en