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WIKA · Pressure measurement · Family BWX

Bourdon tube pressure switch

Bourdon tube pressure switch with stainless steel housing, for safety-critical applications in harsh environments, with options for intrinsic safety and SIL certification.
Range
-1…1000 bar
Accuracy
≤ 0.5 % of span
Protection
IP66
RoHSUKCAEACPEDATEXIECExCCCKCECASCEEx ia I MaEx ia IIIC T85°C/T135°C Da IP66Ex ia IIC T6/T4Ex ia IIC T6/T4 Ga
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. All wetted materials are from stainless steel as a standard.

In order to ensure as flexible operation as possible, the pressure switches are fitted with microswitches, 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 microswitches with gold-plated contacts can be selected.

For further approvals, see page 5

Special features

  • Robust switch enclosure from 316L, IP66, NEMA 4X
  • Setting ranges from 0 ... 2.5 bar up to 0 ... 1,000 bar, vacuum ranges
  • Intrinsic safety Ex ia available
  • Switch point repeatability < 0.5 %
  • 1 or 2 independent switch points, high switching power up to AC 250 V, 20 A, no supply voltage needed
Identification
ModelBWX
SubcategoryPressure Switch
Measuring range
Pressure ranges-1…1.5 bar · -1…5 bar · -1…15 bar · 0…2.5 bar · 0…6 bar · 0…16 bar · 0…40 bar · 0…100 bar · 0…160 bar · 0…250 bar · 0…400 bar · 0…600 bar · 0…1000 bar
Accuracy
Accuracy class≤ 0.5 % of span
Accuracy standardIEC 61298-2:2008
Safety integrity level (SIL)SIL 2-qualified, SIL 3-qualified
Process conditions
Process connection
¼NPT, female thread½NPT, female thread via adapter½NPT, male thread via adapterG¼, female thread via adapterG½A, male thread via adapterG¼A, male thread via adapter1/4 NPT, female thread1/2 NPT, female thread via adapter1/2 NPT, male thread via adapterG 1/4, female thread via adapterG 1/2 A, male thread via adapterG 1/4 A, male thread via adapter
Process temperature−40…+85 °C
Electrical characteristics
Electrical connection½NPT female thread, M20 x 1.5 female thread, ¾NPT, G½, G¾, M20 x 1.5, cable gland non-armoured nickel-plated brass, cable gland non-armoured stainless steel (AISI 304), cable gland armoured nickel-plated brass, cable gland armoured stainless steel (AISI 304), MIL connector 7-pin DTL 5015
Switching function1 x SPDT, 2 x SPDT, 1 x DPDT
Switching contacts2
Materials
Case materialStainless steel 316L
Wetted parts materialStainless steel AISI 316L, Stainless steel 17-4PH (1.4542), Monel 400, 17-4PH® (1.4542), Monel® 400, Inconel 718 (2.4668)
Operating environment
Ambient temperature−60…+85 °C
IP ratingIP66
Weight2 kg
Certifications and approvals
Certifications
RoHSUKCAEACPEDATEXIECExCCCKCECASCE
Explosion protection
Ex ia I MaEx ia IIIC T85°C/T135°C Da IP66Ex ia IIC T6/T4Ex ia IIC T6/T4 Ga
Additional details
Datasheet languagesEN
Tables from datasheet
Basic information
VersionBourdon tube pressure switch
Special design feature■ Version for hazardous areas (Ex ia) ■ For oxygen, oil- and grease-free ■ Per NACE 1) MR0175 / ISO 15156, use in H₂S-containing environments in oil and gas production ■ Per NACE 1) MR0103 / ISO 17945, metals resistant to sulphide stress cracking ■ Version for hydrogen (H 2 ) applications ■ Drying of wetted parts ■ Offshore version ■ Tropical version (suitable for environments with increased air humidity) ■ Version for ammonia applications ■ Geothermal version ■ Low-temperature version to -60 °C ■ Assembled as a diaphragm seal system
Contact version→See table &#x27;Contact version&#x27;
Function■ 1 x SPDT (single pole double throw) ■ 2 x SPDT (single pole double throw) ■ 1 x DPDT (double pole double throw) The DPDT function is realised with 2 simultaneously triggering SPDT microswitches, within 0.2 %of span.
Dead band■ 1 or 2 contacts with fixed dead band ■ 1 or 2 contacts with adjustable dead band ■ 1 contact with fixed dead band and 1 contact with adjustable dead band
Dielectric strengthSafety class I (IEC 61298-2: 2008)
Switch enclosure
DesignCase cover with bayonet lock, protection against unauthorised access by lead sealing possible. Laser-engraved product label from stainless steel.
MaterialStainless steel 316L
Mounting 2)■ Direct mounting ■ Wall bracket from stainless steel AISI 304 ■ Mounting bracket for 2" pipe mounting from stainless steel AISI 304
Contact versionElectrical rating (resistive load)Suitable for Ex ia option
ACDC
With fixed dead band
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 1)250 V, 15 A24 V, 2 A, 220 V, 0.5 AYes
UO1 x SPDT, gold-plated, hermetically sealed, argon gas filling 1)125 V, 1 A24 V, 0.5 AYes
UG1 x SPDT, gold-plated125 V, 1 A24 V, 0.5 AYes
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 1)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 1)125 V, 1 A24 V, 0.5 AYes
DG2 x SPDT or 1 x DPDT, gold-plated125 V, 1 A24 V, 0.5 AYes
With adjustable dead band
UR1 x SPDT, silver250 V, 20 A24 V, 2 A, 220 V, 0.5 AYes 2)
RR 3)2 x SPDT or 1 x DPDT, silver250 V, 15 A24 V, 2 A, 220 V, 0.5 AYes 2)
Accuracy specifications
Set point repeatability≤ 0.5 %of span of setting range
Dead band→See table &#x27;Setting range&#x27;
Setting range (=working range)Proof pressureFixed dead bandAdjustable dead band
in barin bar1 contact UN, US, UO, UG in bar2 contacts DN, DS, DO, DG in bar1 contact UR in bar
-1 ... +1.54.5≤ 0.15≤ 0.300.35 ... 1.10
-1 ... +512≤ 0.20≤ 0.300.55 ... 1.70
-1 ... +1530≤ 0.30≤ 0.401.40 ... 3.10
0 ... 2.54.5≤ 0.15≤ 0.300.35 ... 1.10
0 ... 612≤ 0.20≤ 0.300.55 ... 1.70
0 ... 1630≤ 0.30≤ 0.401.40 ... 3.10
0 ... 4075≤ 0.60≤ 0.702.10 ... 6.00
0 ... 100160≤ 2≤ 26 ... 17
0 ... 160210≤ 3≤ 313 ... 35
0 ... 250330≤ 5≤ 521 ... 65
0 ... 400480≤ 8≤ 826 ... 93
0 ... 600720≤ 12≤ 1240 ... 115
0 ... 1,000 1)1,200≤ 20≤ 3075 ... 190
View all (14)
Process connection
Standard■ ANSI/ASME B1.20.1 ■ DIN EN ISO 228
Size
ANSI/ASME B1.20.1■ ¼NPT, female thread ■ ½NPT, female thread via adapter ■ ½NPT, male thread via adapter
DIN EN ISO 228■ G¼, female thread via adapter ■ G½A,male thread via adapter ■ G¼A,male thread via adapter
Material (wetted)
Sensor elementDepending on the selected version
Process connection→See table &#x27;Wetted parts&#x27;
Wetted parts
VersionBourdon tubeProcess connection
StandardStainless steel AISI 316L
Setting range: 0 ... 1,000 barStainless steel 17-4PH  (1.4542)Stainless steel AISI 316L
NACE Setting range: 0 ... 40 to 0 ... 400 barMonel  400Stainless steel AISI 316L
Monel  Setting range: 0 ... 40 to 0 ... 400 barMonel  400
Electrical connection
Connection type■ Female thread½NPT ■ Female thread M20 x 1.5 ■ Female thread ¾NPT, G½, G¾, M20 x 1.5 ■ Cable gland non-armoured, nickel-plated brass ■ Cable gland non-armoured, stainless steel (AISI 304) ■ Cable gland armoured, nickel-plated brass ■ Cable gland armoured, stainless steel (AISI 304) ■ MIL connector, 7-pin, DTL 5015
Wire cross-sectionUse 0.5 ... 1.5 mm² (20 ... 16 AWG) for internal terminal block (also suitable for cable lugs). For the grounding cable connection to the protective conductor use max. 4 mm² for the internal and external screw.
Pin assignmentConnection details are given on the product label of the instrument. Connection terminals and the ground terminal are appropriately marked.
Operating conditions
Medium temperature range-40 ...+85 °C
Ambient temperature rangeT6/T85°C T a -60 ...+60
T4/T135°C T a -60 ...+85
Non-Ex versions ■ -40 ...+85 °C
Ingress protection of the complete instrumentIP66 per EN/IEC 60529 (NEMA 4X)
WeightApprox. 2.0 kg
LogoDescriptionRegion
EU declaration of conformityEuropean Union
Pressure equipment directive PED, annex 1, category IV, safety accessories, module B + D
Low voltage directive
RoHS directive
LogoDescriptionRegion
EU declaration of conformityEuropean Union
ATEX directive 1) IM1 II1GD
IECEx 1) Ex ia I Ma Ex ia IIC T6/T4 2) Ga Ex ia IIIC T85°C/T135°C 2) Da IP66International
UKCAUnited Kingdom
Pressure equipment (safety) regulations
Electrical equipment designed for use within certain voltage limits in support of the electrical equipment (safety) regulations
Restriction of hazardous substances (RoHS) regulations
Equipment and protective systems intended for use in potentially explosive atmospheres regulations 1)
EACEurasian Economic Community
Low voltage directive (applies only for non-Ex versions)
Hazardous areas 1)
Ex Ukraine Hazardous areas 1)Ukraine
CCC Hazardous areas 1)China
KCs Hazardous areas 1)South Korea
-ECAS Hazardous areas 1)United Arab Emirates
LogoDescription
SIL3 IEC 61508 / IEC 61511SIL 3-capable (option) Functional safety per IEC 61508 Contains performance level calculation per ISO 13849-1
Certificates
Certificates■ 2.2 test report per EN 10204 (e.g. state-of-the-art manufacturing, indication accuracy) ■ 3.1 inspection certificate per EN 10204 (e.g. indication accuracy)
Recommended calibration interval1 year (dependent on conditions of use)
Safety-related characteristic values (Ex)
VoltageUi = DC 30V
CurrentIi = 100mA
PowerP i = 750mW
Effective internal capacitanceCi = 0 μF
Effective internal inductanceLi=0mH
ModelDescription
910.15Syphons →See data sheet AC 09.06
910.13Overpressure protector →See data sheet AC 09.04
IV10, IV11Needle valve and multiport valve →See data sheet AC 09.22
IV20, IV21Block-and-bleed valve →See data sheet AC 09.19
IVMMonoflange, process and instrument version →See data sheet AC 09.17
BVBall valve, process and instrument version →See data sheet AC 09.28