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Thank you for our conversation,Irasema Rodriguez

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Compact Pressure Switches  4 

Type 9671X / 9681X  4 

Bourdon Tube Press. Switches ` 6 

Type B1X / B2X  6 

Metal Diaphragm Switches ` 8 

Type D1X / D2X  8 

Electr. Dual Pressure Switch (Ex) 10

Type UDS7 Ex 10

ContentsContents

ContactContact

Your contact personPRECISION Fluid Controls S.R.L.Graziano CarboniVia S. Rita Da Cascia 3320143 Milano

Phone: 0039 (0) 2 89 15 92 70Fax: 0039 (0) 2 89 15 92 71E-Mail: precision@precisionfluid.it

Type 9671X / 9681XCompact Pressure Switches Type 9671X / 9681X

Diaphragm seal piston sensor in explosion proof housing,for harzardous areas,accuracy class 2% f. s.

Features Stainless steel body and parts,Flameproof enclosure according to ATEX, UL, CSA,Safe to adjust during operation,1 switching contact (SPDT)

Adjustment ranges Type 9671X: -0.17 bar ... -1 bar, vacuumType 9681X: 0.33 ... 34.4 bar, pressure

Applications Process Industry,Petrochemical Plants,Machine Tool Industry,Compressors

Technical Data Wetted parts: Process fitting: Seals: Diaphragm:

 Stainless steel, material no.1.4401FKM, PTFE support ringFKM

Repeatability: ±2 % f. s.

Switching rate: max. 30/min

Temperature range: -30 °C... +75 °C

Protection class: IP65

Housing: Stainless steel 1.4401,explosion proof

Process connection: 1/4" NPT female thread

Electrical connection: 1/2" NPT AG male conduitconnector 18 AWG 18"(450 mm) lead wire, PVC jacket

Switch type: Rating:

Option:

Switch contact SPDT11 A, 125 / 250 V AC5 A, 30 V DC1 A, 125 V DC1 switching contact,1 x DPDT

Weight: 375 g

Set point adjustment: Turn the adjustment wheelclockwise to increase the setpoint

Vibration resistance: 10 g, sine 10...500,MIL-STD 202F

Shock resistance: 50 g, 11 ms, MIL-S-901C

Approvals: CENELEC Ex d II C T6,UL #E37043, CSA #LR22354and Division I Class I,Group A, B, C & D; ClassII, Group E, F & G

Certificate no.: LCIE 02 ATEX 6027X

Options: Dual circuit 2 SPDT switcheswith DPDTfunctionGold contact switch, 1 A,125 V ACEx terminal boxTamper proof cover

Barksdale 4 

Index: D / 923-1518

PressureType 9671X / 9681XCompact Pressure Switches Type 9671X / 9681X

Dimensions (mm / inch)

Wiring code Pressure 9681X Vacuum 9671X Option

Function Circuit 1 Circuit 2 Circuit 1 Circuit 2

Normally Open / NO red yellow blue orange K with mountingholes

Common / C purple brown purple brown

Normally Closed / NC blue orange red yellow

Earth green green

Pressure Ranges Ordering code

1 Switch contactSPDT (standard)

Ordering code1 Switch contact

DPDT (option)

Adjustment ranges [bar] Max.hysteresis

(end of range)

Max.operatingpressure

Proofpressure

Increasing press. Decreasing press.

min. max. min. max. [bar] [bar] [bar]

9681X-1CC-1 9681X-2CC-1 0.33. 1.03. 0.13. 1.0. 0.2. 45. 68.

9681X-1CC-2 9681X-2CC-2 0.20. 10.30. 0.34. 9.0. 1.7. 45. 68.

9681X-1CC-3 9681X-2CC-3 4.40. 20.60. 1.70. 18.0. 2.7. 45. 68.

9681X-1CC-4 9681X-2CC-4 8.50. 34.40. 4.40. 30.0. 4.1. 45. 68.

Vacuum switches

9671X-1CC 9671X-2CC -0.17 -1.00 -0.034 -0.71 0.3. --- 2.

Accessories Order Number Description

926-0811 Ex d - Terminal box incl. terminal (drawing 923-1533 on request)

999-0081 Tamper proof cover

Subject to technical changes.Barksdale  5 

Type B1X / B2XBourdon Tube Press. Switches ` Type B1X / B2X

Mechanical single/dual pressure switchRepeatability ±1.0 % at constant temperature

Features Bourdon tube pressure switchAll welded parts wetted.Direct acting, no friction, high accuracy

Adjustment ranges 5.3 ... 496 bar

Applications Petrochemicals industry,Process technology,Shipbuilding technology,Alarm applications

Technical Data Wetted parts: Process connection: Bourdon tube:

 Stainless steel 1.4401Stainless steel 1.4401

Repeatability: ±1 % at constant temperature

Switching rate: max. 20/min

Temperature range: -40 °C... +75 °C

Protection class: IP65

Housing: Explosion proof housing, aluminumanodized and lacquered

Process connection: 1/4" NPT female thread exceptranges marked with*). Theseswitches have proof pressuresabove 500 bar and are providedwith high pressure thread withadapter G1/4 IG.

Electrical connection: Internal terminal strip (0.5 - 2.5mm2), approved cable gland hasto be provided by the customer

Electrical rating andhysteresis:

Many micro switch versions withdifferent switching powers andhysteresis are applicable andmake it possible to makecustomized changes.

Weight: B1X-...: approx. 3.9 kgB2X-...: approx. 3.9 kg

Set point adjustment: Turn the adjustment screwclockwise to decrease the setpoint.

Intrinsically safe: The switches are designed forintrinsically safe applications.Please add "Exi" to your orderingdetails when placing an order. Tocomply with the intrinsically safeapproval following max. ratingsmust not beexceeded:Umax = 28 V Imax = 50 mA

Approval: Ex: Ex d II C T6 acc. to ATEXcULus: Class I, Groups B, C, D Class II, Groups E, F, G acc. to Underwriter Laboratories Inc. and Canadian Standard Assn.

Pressure Ranges

Pressure rangecode

Adjustment range [bar]Max. operatingpressure [bar]

Proof pressure[bar]

Max. hyst. of the different switches inbar (end of range)

Increasing press. Decreasingpress. (short term) H, GH [bar] M, GM [bar]

12SS 5.3... 83 3.4... 81 100. 125. 0.96. 1.86.

20SS 13.7... 137 11.0... 134 250. 330. 2.68. 5.44.

32SS 22.4... 220 16.5... 215 400. 500. 2.75. 5.90.

72SS* 79.3... 496 41.4... 459 600. 950. 16.90. 37.90.

Barksdale 6 

Index: F / 923-1500

PressureType B1X / B2XBourdon Tube Press. Switches ` Type B1X / B2X

Dimensions (mm / inch)

Electrical Ratings Microswitch

Special features Volt AC50/60 Hz

Ind. loadA

Res. loadA

Volt DC Ind. loadA

Res. loadA

Comments

 H  Micro switch withsilver contacts

125250480*

10103

10103

6to24

0.50. 0.5.Small hysteresis;High AC-/low DC-load

 M  Micro switch withsilver contacts

125250480*

10103

10103

1224

250*

5.001.000.25

15.02.00.4

Medium hysteresis;High AC- andDC-loads

GHMicro switch withgold-plated contactsfor low voltage and/or low current

125. 1. 1. 24. 1.00. 1.00. Small hysteresis

GM 30. 0.1. 0.1. 30. 0.10. 0.1. Medium hysteresis

* on request

Approvals EX Ex d approval

UL cULus approval

EXI Ex i approval

Options P2 = 1/2" NPT F SS Process connection

Order Code Example for order number

Type Microswitch

Pressure rangecode Options Approval

B1X or B2X  -   H  72SS  -  P2  -  UL

Your order number

Type Microswitch

Pressure rangecode Options Approval

or  -   -   - 

Subject to technical changes.Barksdale  7 

Type D1X / D2XMetal Diaphragm Switches ` Type D1X / D2X

Mechanical single/dual pressure switchRepeatability ±1.0 % at constant temperature

Features Metal diaphragm pressure switchWetted parts welded.Direct action, no friction, high accuracy

Adjustment ranges 0.012 ... 10.3 bar and-0.006 ... -1 bar (Vacuum)

Applications Petrochemical industry,Process technology

Technical Data Wetted parts: Stainless steel 17 - 7PH/SS304

Repeatability: ±1 % at constant temperature

Switching rate: max. 20/min

Temperature range: -40 °C... +75 °C

Protection class: IP65

Housing: Explosion proof housing, aluminumanodized and lacquered

Process connection: 1/4" NPT female threadOptional: 1/2" NPT female thread(P2)

Electrical connection: Internal terminal strip (0.5 - 2.5mm2),approved cable gland has to beprovided by the customer

Electrical ratings andhysteresis:

A large variety of micro switchesoffers different electrical ratingsandhysteresis for many applications.

Weight D1X-...: approx. 2.7 kgD2X-...: approx. 2.8 kg

Set point adjustment: Turn the adjustment screwclockwise to decrease the setpoint

Intrinsically safe: The switches are designed forintrinsically safe applications.Please add "Exi" to your orderingdetails when placing an order. Tocomply with the intrinsically safeapproval following max. ratingsmust not be exceeded:Umax = 28 V Imax = 50 mA

Approval: Ex: Ex d II C T6 acc. to ATEXcULus: Class I, Groups B, C, D Class II, Groups E, F, G

acc. to Underwriter Laboratories Inc. and Canadian Standard Assn.

Pressure Ranges Pressure

rangecode

Adjustment range [bar] Max. operatingpressure [bar]

Proof pressure[bar]

Max. hysteresis of switchtypes in bar (end of range)

Increasing press. Decreasing press. (short term) H, GH [bar] M, GM [bar]

Overpressure

3SS 0.012 ... 0.2 0.002 ... 0.196 0.5. 0.7. 0.004. 0.010.

18SS 0.050 ... 1.2 0.030 ... 1.2 3.0. 4.0. 0.010. 0.040.

80SS 0.300 ... 5.5 0.030 ... 5.3 8.0. 10.7. 0.100. 0.220.

150SS 0.500 ... 10.3 0.100 ... 9.9 15.0. 20.0. 0.180. 0.400.

Vacuum

3SS -0.006 ... -0.2 -0.002 ... -0.196 0.15. 0.2. 0.004. 0.009.

18SS -0.040 ... -1.0 -0.020 ... -0.970 0.5. 1.0. 0.020. 0.060.

Barksdale 8 

Index: D / 923-1488

PressureType D1X / D2XMetal Diaphragm Switches ` Type D1X / D2X

Dimensions (mm / inch)

Approvals EX Ex d approval

UL cULus approval

EXI Ex i approval

Wiring Code 1

Options P2 = 1/2" NPT F SS Process connection

Electrical Ratings Microswitch

Special features Volt AC50/60 Hz

Ind. loadA

Res. loadA

Volt DC Ind. loadA

Res. loadA

Comments

 H  Micro switch with silvercontacts

125250480*

10103

10103

6to24

0.50. 0.5.Small hysteresis;High AC /low DC loads

 M  Micro switch with silvercontacts

125250480*

10103

10103

1224

250

5.001.000.25

15.02.00.4

Medium hysteresis;High AC andDC loads

GHMicro switch with gold-platedcontacts for low voltageand/or low current

125. 1. 1. 24. 1.00. 1.00. Small hysteresis

GM 30. 0.1. 0.1. 30. 0.10. 0.1. Medium hysteresis

Order Code Example for order number

Type Micro switch Pressure range Options Approval

D1X or D2X  -   H  3SS  -  P2  -  EX

Your order number

Type Micro switch Pressure range Options Approval

or  -   -   - 

Subject to technical changes.Barksdale  9 

Type UDS7 ExElectr. Dual Pressure Switch (Ex) Type UDS7 Ex

Electronic pressure switch for pressure control inexplosion-proof areas with internal stainless steeldiaphragm, digital display, 2 solid state contacts accord.to Namur DIN 19234 and 1 analog output, linearity error0.5 % f. s.

Features Intrinsically safe accord. to ATEX, alphanumeric 4-digit LCDdisplay, microprocessor controlled, self monitoring with errordisplay, all parameters are configured by keypad, adjustablekeypad lock, various access levels, rugged stainless steelconstruction

Measuring ranges 0...1 bar 0...10 bar, absolute pressure-1... 0 bar; 0...0.2 bar to 0... 600 bar; relative pressure

Applications Gas compressors, process / chemical technologytest bed and apparatus engineering,injection moulding machines

Technical Data Sensor element: Piezoresistive silicon

measuring cell

Materials: Wetted parts: Electronics housing: Seals:

 Stainless steel, mat. no. 1.4301Stainless steel, mat. no. 1.4571FKM (standard), EPDM

Operating elements: 3 easy-response pushbuttons

System of protection: IP65 plug

Protection class: ---

Process connection: G1/4 M

Dimensions: 32 x 163 mm

Weight: approx. 250 g

Measuring ranges [bar]:Proof pressure [bar]:

10. 50. 100. 200. 400.

15. 75. 150. 300. 600.

Linearity error: ±0.5 % v. f. s. at 25 °C

A/D converter: Resolution:

Scanning rate:

 12 bit(4096 steps per measuringspan)100 / s (for peak value memory)

Electrical connection: Plug M12 x 1; 4-pin, female /male thread

Temperature influence: ±0.2 % f. s. /10K (20 °C)

Compensation range: -10 °C... +70 °C

Repeatability: ±0.1 % v. f. s.

Temperature range: Medium: Operating range: Storage:

 0 °C... +60 °C0 °C... +60 °C-10 °C... +65 °C

Max. ambient temperature -20 °C... +80 °C

Power supply: 18... 28 V DC, intrinsically safeacc. to ATEX

On-status display:

Display rate: Delay: Error display:

4-digit LCD display,digit height 10 mm5 / s0.0 s ... 9.9 s adjustableon LCD display

Power consumption: approx. 40 mA at Ub = 24 V DC

Analog output: Current output: Load:

Load influence: Adjustment range:

4...20 mAmax. RI = (Ub-12 V) / 20 mARI = 600 Ohm at Ub = 24 V DC0.3 % / 100 Ohm25 %... 100 % f. s.

Transistor switching outputs: Switching function:

Adjustment range: Switching frequency: Delay:Status display:

 acc. to Namur DIN 19234Normally open / normallyclosed, standard / windowmode and diagnosis functionadjustable0 %... 125 % f. s.max. 100 Hz 0.0... 9.9 sadjustableon LCD display

Item designation II 1 / 2 G EEx ia IIC T4category 1, 2

Certificate no.: TÜV 02 ATEX 1879X

Barksdale10

Index: A / 923-1135

PressureType UDS7 ExElectr. Dual Pressure Switch (Ex) Type UDS7 Ex

Dimensions (mm / inch) Electronic connections

Order Numbers 2 solid state outputs acc. to Namur DIN 19234,

analog output 4... 20 mA, plug /load M12 x 1, 4-pin

Measuring ranges Process connection: G1/4M

Process connection: G1/2M

0... 10 bar relative 0427-818 0427-879

0... 50 bar relative 0427-819 0427-880

0... 100 bar relative 0427-820 0427-881

0... 200 bar relative 0427-821 0427-882

0... 400 bar relative 0427-822 0427-883

0... 600 bar relative 0427-866 0427-884

Plug UDS7-Ex

Accessories Order Number Description

0499-016 Adapter G1/4 IG - G1/4 male thread for optimum alignment of pressure switch

0499-002 Wall mounting brackets, stainless steel

901-0677 Damping screw with 0.2 mm restriction against quick pressure changes and high pulsation rate

907-0357 S1 plug M12 x 1, 4-pin, female thread, with screw terminals

907-0418 S2 plug M12 x 1, 4-pin, male thread, with screw terminals

909-0482 Zener barrier type Z788 with potential compensation

909-0483 Isolation amplifier type KFD2-SOT2-Ex2

Subject to technical changes.Barksdale 11

ExpertsSpecialists for monitoringand control of► Pressure► Temperature► Level► Flow

Barksdale develops market-focused solutions forcustomers in the fluid power, transportation andindustrial equipment markets focusing onapplications that include:

Mobile and stationaryhydraulics

Shipbuilding Oil and gas exploration

Truck, trailer and bussuspensions

Sensorics for hydraulicpower packs

Product overview

Barksdale GmbHDorn-Assenheimer Str. 2761203 ReichelsheimGermanyPhone: +49 (0) 6035 949 - 0Fax: +49 (0) 6035 949 - 111info@barksdale.dewww.barksdale.de

PRECISION Fluid Controls S.R.L.Via S. Rita Da Cascia 3320143 MilanoItalyPhone: +0039 (0) 2 89 15 92 70Fax: +0039 (0) 2 89 15 92 71precision@precisionfluid.itwww.precisionfluid.it

Barksdale China33F Huaihai Plaza1045 Central Huaihai Road200031 ShanghaiChinaPhone: +86 2161 273 000Fax: +86 2164 733 298chinasales@barksdale.comwww.barksdalechina.com

Barksdale IndiaSF-4Ansal Fortune Arcade, Sector-18201301 NoidaIndiaPhone: +91 1202 510 522Fax: +91 1202 510 520sales@barksdale.inwww.barksdale.in

Barksdale Inc.3211 Fruitland AvenueLos Angeles, CA 90058-0843USAPhone: +1 (323) 589 - 6181Fax: + 1 (323) 589 – 3463sales@barksdale.comwww.barksdale.com

Specifications are subject to changes without notice.