# Differential pressure switch — DPS40

> Differential pressure switch for monitoring and control of filters, compressors and pumps in boilers, pressure vessels, water treatment, heating, and fire-extinguishing systems.

- Catalog code: dps40
- Model: DPS40
- Category: Pressure measurement › Contact pressure gauges
- Product page: https://avigan.com.ua/wika/en/products/dps40
- Price: on request
- Supplier: AVIGAN (TOV VIKA Prylad), official WIKA partner in Ukraine

## Overview

The differential pressure gauges of the DELTA-line product family are primarily used for the monitoring and control of low differential pressures where there ...

## Applications

- Monitoring and control of filters, compressors and pumps for:
- Boilers and pressure vessels
- Drinking and cooling-water treatment plants
- Pressure-boosting and pumping stations
- Heating technology
- Fire-extinguishing systems

## Special features

- With one or two adjustable micro switches
- Shatterproof window and robust aluminium or stainless steel measuring chamber for increased requirements
- Optionally with approvals for hazardous areas
- High ingress protection, IP65, for outdoor use and processes with high condensation
- Low measuring range from 0 ... 250 mbar

## Specifications

| Parameter | Value |
|---|---|
| model | DPS40 |
| product family | DELTA-switch |
| short description | Differential pressure switch for monitoring and control of filters, compressors and pumps in boilers, pressure vessels, water treatment, heating, and fire-extinguishing systems. |
| subcategory | Differential pressure switch |
| certifications | RoHS; EAC; CE; Ex Ukraine; REACH |
| explosion protection | Gas II 2G Ex ia IIC T4/T5/T6 Gb; Dust II 2D Ex ia IIIB T135°C Db; ATEX directive Hazardous areas Gas II 2G Ex ia IIC T4/T5/T6 Gb Dust II 2D Ex ia IIIB T135°C Db; IECEx Hazardous areas; Ex Ukraine Hazardous areas; Dust II 2D Ex ia IIIB T135℃ Db; ATEX; IECEx; EAC; Ex Ukraine |
| ambient temp | -10 … 70 °C |
| ip rating | IP65 |
| weight kg | 1.4 |
| languages in datasheet | en; de |
| pressure ranges | 0 … 250 mbar; 0 … 400 mbar; 0 … 600 mbar; 0 … 1000 mbar; 0 … 0.25 bar; 0 … 0.4 bar; 0 … 0.6 bar; 0 … 1 bar; 0 … 1.6 bar; 0 … 2.5 bar; 0 … 4 bar; 0 … 6 bar; 0 … 10 bar; -12.5 … 12.5 kPa; 0 … 25 kPa; 0 … 40 kPa; 0 … 60 kPa; 0 … 100 kPa; 0 … 160 kPa; 0 … 250 kPa; 0 … 400 kPa; 0 … 600 kPa; 0 … 1000 kPa; 0 … 0.025 MPa; 0 … 0.04 MPa; 0 … 0.06 MPa; 0 … 0.1 MPa; 0 … 0.16 MPa; 0 … 0.25 MPa; 0 … 0.4 MPa; 0 … 0.6 MPa; 0 … 1 MPa |
| accuracy class | ≤ 1.6 % of measuring span |
| accuracy standard | EN 837 |
| process connections | 2 x G ¼, female thread, centre distance 26 mm; 2 x G ¼ B, male thread, centre distance 26 mm; 2 x compression fitting with ferrule for pipe ∅ 6 mm; 2 x compression fitting with ferrule for pipe ∅ 8 mm; 2 x compression fitting with ferrule for pipe ∅ 10 mm; G ¼ female thread, centre distance 26 mm; G ¼ B male thread, centre distance 26 mm; Compression fitting with ferrule for pipe ∅ 6 mm; Compression fitting with ferrule for pipe ∅ 8 mm; Compression fitting with ferrule for pipe ∅ 10 mm; G ¼ female thread |
| case material | aluminium, EN AC-AI Si9Cu3(Fe), black painted; Aluminium, EN AC-Al Si9Cu3(Fe), black painted; aluminium; stainless steel |
| wetted parts material | Aluminium, Al Si9Cu3(Fe), black painted; Stainless steel 1.4571; Copper alloy; Steel; Stainless steel; FPM/FKM; NBR; aluminium; stainless steel |
| sealing material | FPM/FKM; NBR |
| dial size mm | 100 |
| process temp | -10 … 90 °C |
| output signal | Micro switch; 4-20mA |
| power supply | DC 30 V |
| electrical connection | Cable gland M20 x 1.5, with 1 m cable, flying leads |
| switching function | Change-over contact |
| switching contacts | 2 |

## Datasheet tables

### Basic information

| Nominal size | Ø100mm |
|---|---|
| Window | Plastic, with plug screw for switch point setting |
| Case version | Display case, aluminium, EN AC-AI Si9Cu3(Fe); black painted |
|  | →Measuring chamber, see table 'Measuring element' |

### Measuring element

| Type of measuring element | Measuring chamber with diaphragm and media chambers⊕and⊖ |
|---|---|
| Material |  |
| Measuring chamber | ■ Aluminium, EN AC-Al Si9Cu3(Fe), black painted ■ Stainless steel 1.4571 |
| Diaphragm, sealings | ■ FPM/FKM ■ NBR |

### Accuracy specifications

| Repeatability | ≤ 1.6 %of measuring span |
|---|---|
| Temperature error | On deviation from the reference conditions at the measuring system: Max. ±0.8 %/10 K of end value of measuring range |
| Reference conditions |  |
| Ambient temperature | +20 °C [+68 °F] |

| Measuring range mbar | psi |
|---|---|
| 0 ... 250 | 0 ... 15 |
| 0 ... 400 | 0 ... 25 |
| 0 ... 600 | 0 ... 40 |
| 0 ... 1,000 | 0 ... 60 |
| bar | kg/cm 2 |
| 0 ... 0.25 | 0 ... 0.25 |
| 0 ... 0.4 | 0 ... 0.4 |
| 0 ... 0.6 | 0 ... 0.6 |
| 0 ... 1 | 0 ... 1 |
| 0 ... 1.6 | 0 ... 1.6 |
| 0 ... 2.5 | 0 ... 2.5 |
| 0 ... 4 | 0 ... 4 |
| 0 ... 6 | 0 ... 6 |
| 0 ... 10 | 0 ... 10 |
| kPa | MPa |
| -12.5 ... +12.5 | 0 ... 0.025 |
| 0 ... 25 | 0 ... 0.04 |
| 0 ... 40 | 0 ... 0.06 |
| 0 ... 60 | 0 ... 0.1 |
| 0 ... 100 | 0 ... 0.16 |
| 0 ... 160 | 0 ... 0.25 |
| 0 ... 250 | 0 ... 0.4 |
| 0 ... 400 | 0 ... 0.6 |
| 0 ... 600 | 0 ... 1 |
| 0 ... 1,000 |  |

### Further information on: Measuring ranges

| Type of pressure | Differential pressure |
|---|---|
| Special measuring ranges | Other measuring ranges on request |
| Unit | ■ bar ■ psi ■ mbar ■ kg/cm² ■ MPa ■ kPa |

| Logo | Description | Country |
|---|---|---|
|  | EU declaration of conformity | European Union |

| Logo | Description | Country |
|---|---|---|
|  | EU declaration of conformity | European Union |
|  | ATEX directive Hazardous areas Gas II 2G Ex ia IIC T4/T5/T6 Gb Dust II 2D Ex ia IIIB T135°C Db |  |
|  | IECEx Hazardous areas | International |
|  | EAC ■ EMCdirective ■ Low voltage directive ■ Hazardous areas | Eurasian Economic Community |
|  | Ex Ukraine Hazardous areas | Ukraine |

### Safety-related characteristic values (Ex)

| Terminals | 2 |
|---|---|
| Switch A | '1' / '4' / '2' |
| Switch B | '3' / '6' / '5' |
| Maximum voltage U i | DC 30V |
| Maximum current l i | 100mA |
| Maximum power P i (gas) | 1W |
| Maximum power Pi (dust) |  |
| Ta ≤ +40 °C | ≤ 750mW |
| Ta ≤ +60 °C | ≤ 650mW |
| Effective internal capacitance C i | Negligible |
| Effective internal inductance L i | Negligible |

| Model | 2 | Description | Order number |
|---|---|---|---|
|  | - | Panel mounting flange, aluminium | 14074004 |
|  | Panel mounting flange, stainless steel | 14075088 |  |
|  | 910.17 | Sealings →see data sheet AC 09.08 | - |
|  | 910.15 | Syphons →see data sheet AC 09.06 | - |
|  | IV3x | 4-way valve block, stainless steel →For dimensions see page 8 | 2043559 |
|  | 4-way valve block, brass →For dimensions see page 8 | 2043567 |  |
|  | - | Compression fittings with ferrule or clamp ring for pipe diameters 6, 8 and10mm | On request |

## Documents

- [ds_pv2721_en_co_d64bf7](https://avigan.com.ua/wika/docs/wika/ds_pv2721_en_co.pdf) — PDF, 808 KB, en