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WIKA · Pressure measurement · Family DW

Differential pressure switch

Stainless steel switch enclosure
Range
-12.5…40 bar
Accuracy
≤ 1 % of span
Protection
IP66
CERoHSEACCCCKOSHANACEATEXIECExEx-UkraineEx ia I MaEx ia IIC T6/T4 GaEx ia IIIC T85/T135 Da
Price
On request
Depends on configuration
Request a quote
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Description

These high-quality pressure switches have been developed especially for safety-critical applications. The high quality of the products and manufacturing in accordance with ISO 9001 ensure reliable monitoring of your plant. In production, the switches are traced by quality assurance software at every step and subsequently are 100 % tested.

In order to ensure as flexible operation as possible, the pressure switches are fitted with micro switches, which enable the switching of an electrical load of up to AC 250 V, 20 A directly.

For lower switching power ratings, such as for PLC applications, argon gas-filled micro switches with gold-plated contacts can be selected.

Special features

  • No power supply needed for switching of electrical loads
  • Robust switch enclosure from stainless steel 316L, IP66, NEMA 4X
  • Setting ranges from 0 ... 16 mbar to 0 ... 40 bar with high static and high one-sided pressure up to 160 bar
  • Intrinsic safety Ex ia available
  • 1 or 2 independent set points, SPDT or DPDT, high switching power up to AC 250 V, 20 A
Identification
ModelDW
SubcategoryDifferential pressure switch
Measuring range
Pressure ranges0…0.16 bar · 0…0.25 bar · 0…0.4 bar · 0…0.6 bar · 0…1 bar · 0…2.5 bar · 0…4 bar · 0…6 bar · 0…10 bar · 0…16 bar · 0…25 bar · 0…40 bar · -0.04…0.12 bar · -0.06…0.19 bar · -0.2…0.2 bar · -0.3…0.3 bar · -0.5…0.5 bar · -1.25…1.25 bar · -2…2 bar · -3…3 bar · -5…5 bar · -8…8 bar · -12.5…12.5 bar · 0…16 mbar · 0…25 mbar · 0…40 mbar · 0…60 mbar
Accuracy
Accuracy class≤ 1 % of span
Accuracy standardIEC 61298-2:2008
Safety integrity level (SIL)SIL 2 per IEC 61508
Process conditions
Process connection
¼ NPT female½ NPT maleG ½ A maleG ¼ A male½ NPT femaleG ¼ femaleM20 x 1.5 male
Process temperature−30…+85 °C
Electrical characteristics
Electrical connection½ NPT female
Switching functionSPDT or DPDT
Switching contacts1
Materials
Case materialStainless steel 316L
Wetted parts materialAISI 316, AISI 316L, AISI 304, Monel 400, Inconel 718
Sealing materialNBR
Operating environment
Ambient temperature−30…+85 °C
IP ratingIP66
Weight6.2 kg
Certifications and approvals
Certifications
CERoHSEACCCCKOSHANACEATEXIECExEx-Ukraine
Explosion protection
Ex ia I MaEx ia IIC T6/T4 GaEx ia IIIC T85/T135 Da
Additional details
Datasheet languagesEN
Tables from datasheet
Contact versionElectrical rating (resistive load)Suitable for Ex ia option
ACDC
UN1 x SPDT, silver250 V, 15 A24 V, 2 A, 125 V, 0.5 A, 220 V, 0.25 ANo
US1 x SPDT, silver, hermetically sealed, argon gas filling 2)250 V, 15 A24 V, 2 A, 220 V, 0.5 AYes
UO1 x SPDT, gold-plated, hermetically sealed, argon gas filling 2)125 V, 1 A24 V, 0.5 AYes
UG1 x SPDT, gold-plated125 V, 1 A24 V, 0.5 ANo
UR1 x SPDT, silver, adjustable dead band250 V, 20 A24 V, 2 A, 220 V, 0.5 AYes 3)
DN2 x SPDT or 1 x DPDT, silver250 V, 15 A24 V, 2 A, 125 V, 0.5 A, 220 V, 0.25 ANo
DS2 x SPDT or 1 x DPDT, silver, hermetically sealed, argon gas filling 2)250 V, 15 A24 V, 2 A, 220 V, 0.5 AYes
DO2 x SPDT, or 1 x DPDT gold-plated, hermetically sealed, argon gas filling 2)125 V, 1 A24 V, 0.5 AYes
DG2 x SPDT or 1 x DPDT, gold-plated125 V, 1 A24 V, 0.5 ANo
Maximum values
Voltage U iDC 30V
Current l i100mA
Power P i0.75W
Internal capacitance C i0 μF
Internal inductance L i0mH
Setting rangeStainless steel versionNACE version 1)Monel version
DiaphragmProcess connectionDiaphragmProcess connectionDiaphragmProcess connection
16 mbarAISI 316AISI 316L---
25 mbar
40 mbar
60 mbar
160 mbarMonel ® 400AISI 316LMonel ® 400
250 mbar
400 mbar
600 mbar
1 bar
2.5 bar
4 barAISI 304
6 bar
10 bar
16 barInconel ® 718Inconel ® 718-
25 bar
40 bar
Δp-cellSetting rangeFixed dead band for contact versionAdjustable dead band for contact versionStatic / One-sided pressure
in bar1 contact UN, US, UO, UG in mbar2 contacts DN, DS, DO, DG in mbar1 contact UR in mbarin bar
L0 ... 0.16≤ 6≤ 625 ... 60≤ 40, ≤ 100 or ≤ 160
0 ...0.25≤ 8≤ 830 ... 80
-0 ... 0.4≤ 20≤ 2045 ... 120
0 ... 0.6≤ 25≤ 2580 ... 200
0 ... 1≤ 40≤ 40100 ... 270
0 ... 2.5≤ 70≤ 70260 ... 700
0 ... 4≤ 120≤ 120450 ... 1,150
0 ... 6≤ 180≤ 180600 ... 1,600
0 ... 10≤ 300≤ 3001,100 ... 2,800
0 ... 16≤ 480≤ 4801,600 ... 3,500
0 ... 25≤ 700≤ 7002,500 ... 5,500
V0 ... 40≤ 1,200≤ 1,200on request
View all (6)
Δp-cellSetting rangeFixed dead band for contact versionAdjustable dead band for contact versionStatic / One-sided pressure
in mbar1 contact UN, US, UO, UG in mbar2 contacts DN, DS, DO, DG in mbar1 contact UR in mbarin bar
-0 ... 16≤ 1.2≤ 1.6-≤ 10 2)
0 ... 25≤ 1.2≤ 1.64 ... 10≤ 10
0 ... 40≤ 1.6≤ 2.25 ... 14
0 ... 60≤ 2.5≤ 3.06 ... 18
LogoDescriptionCountry
EU declaration of conformity ■ Pressure equipment directive ■ Low voltage directive ■ RoHS directive ■ ATEX directive 1) (option) IM1 II1GDEuropean Community
IECEx 1) (option) Ex ia I Ma Ex ia IIC T6/T4 2) Ga Ex ia IIIC T85/T135 2) DaIECEx member states
EAC (option) Hazardous areasEurasian Economic Community
Ex-Ukraine (option) Hazardous areasUkraine
CCC (option) Hazardous areasChina
KOSHA (option) Hazardous areasSouth Korea