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DW03UN 1
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WIKA · Pressure measurement · Family DW03

Differential pressure switch

Differential pressure switch for very low setting ranges, suitable for safety-critical applications in HVAC and power generation, including nuclear power plants, for gaseous and dry media.
Range
0.3…16 mbar
Output
SPDT
Accuracy
≤ 1 % of span
Protection
IP66
RoHSEACEx-UkraineCCCKOSHACEATEXIECExEx ia I MaEx ia IIC T6/T4 GaEx ia IIIC T85°C/T135°C Da IP66Ex ia IIIC T85°C/T135°C DaEx ia IIIC T6/T4 Ga
Price
On request
Depends on configuration
Request a quote
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Description

These high-quality differential 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 differential pressure switches are fitted with micro switches, which enable the switching of an electrical load of up to AC 250 V, 10 A directly.

Special features

  • No power supply needed for switching of electrical loads
  • Robust switch enclosure from stainless steel 316L, IP66, NEMA 4X
  • Setting ranges from 0.3 ... 2.5 mbar to 0.7 ... 16 mbar with high working pressure and high static pressure up to 300 mbar
  • Intrinsic safety Ex ia available
  • 1 set point, SPDT, high switching power up to AC 250 V, 10 A
Identification
ModelDW03UN
Product familyDW03
SubcategoryDifferential pressure switch
Measuring range
Pressure ranges0.3…2.5 mbar · 0.4…4 mbar · 0.4…6 mbar · 0.4…10 mbar · 0.7…16 mbar
Accuracy
Accuracy class≤ 1 % of span
Accuracy standardIEC 61298-2:2008
Safety integrity level (SIL)SIL 3-capable
Process conditions
Process connection
¼ NPT female½ NPT male (via adapter)G ½ A male (via adapter)G ¼ A male (via adapter)½ NPT female (via adapter)G ¼ female (via adapter)M20 x 1.5 male (via adapter)½ NPT maleG ½ A maleG ¼ A male½ NPT femaleG ¼ femaleM20 x 1.5 male
Process temperature−30…+85 °C
Electrical characteristics
Output signalSPDT
Electrical connection½ NPT female
Switching functionSPDT
Switching contacts1
Materials
Case materialStainless steel 316L, Epoxy resin coated
Wetted parts materialStainless steel, Glass-fibre reinforced NBR, Epoxy resin coated, Aluminium casting alloy, Anticorodal® UNI 3571, Aluminium casting alloy (Anticorodal® UNI 3571)
Sealing materialNBR
Operating environment
Ambient temperature−30…+85 °C
IP ratingIP66
Weight2.2 kg
Certifications and approvals
Certifications
RoHSEACEx-UkraineCCCKOSHACEATEXIECEx
Explosion protection
Ex ia I MaEx ia IIC T6/T4 GaEx ia IIIC T85°C/T135°C Da IP66Ex ia IIIC T85°C/T135°C DaEx ia IIIC T6/T4 Ga
Additional details
Datasheet languagesEN, DE
Tables from datasheet
Contact versionElectrical rating (resistive load)Suitable for Ex ia option
ACDC
UN 1 x SPDT, silver250 V, 10 A125 V, 0.1 AYes
Maximum values
Voltage U iDC 30V
Current l i100mA
Power P i0.75W
Internal capacitance C i0 μF
Internal inductance L i0mH
Setting range in mbarWorking range in mbarOne-sided pressure in mbarStatic pressure in mbarFixed dead band for contact version UN
0.3 ... 2.50 ... 2.5≤ 6≤ 300≤ 0.2
0.4 ... 40 ... 4≤ 10≤ 0.3
0.4 ... 60 ... 6≤ 25≤ 0.3
0.4 ... 100 ... 10≤ 25≤ 0.3
0.7 ... 160 ... 16≤ 40≤ 0.5
LogoDescriptionCountry
EU declaration of conformity ■ Pressure equipment directive ■ Low voltage directive ■ RoHS directive ■ ATEX directive 1) IM1 II1GDEuropean Community
IECEx 1) Ex ia I Ma Ex ia IIC T6/T4 2) Ga Ex ia IIIC T85°C/T135°C 2) Da IP66International
EAC (option) Hazardous areas 1)Eurasian Economic Community
Ex-Ukraine (option) Hazardous areas 1)Ukraine
CCC (option) Hazardous areas 1)China
KOSHA (option) Hazardous areas 1)South Korea