Product Features

Low adjustable pressure rangeswith high working pressures

Explosion-proof or general purpose enclosures

Corrosion resistant epoxy coated aluminum sensor housing

Suitable for fluids, air, andgas media

Highly repeatable

Ultra Low

OverviewUE’s new differential pressure switches provide low adjustable ranges with high working (static) pressures. Models 540-543 (K1-K3) utilize a large

diaphragm sensor whose large effective sensing area enables accurate and repeatable performance at low pressures. Models 544-548 (K4-K6) handle

higher pressures with a compact design. The aluminum sensor housings are epoxy-coated for corrosion resistance in harsh environments and are

suitable for use with fluids, air and gas media in a variety of applications in processing, power and OEM markets. Typical services include: monitoring air

or fluid flow, indicating clogged filters and providing alarm/shutdown functions. Vacuum pumps, compressors, purge systems, water injection skids,

scrubbers and burners are some of the equipment frequently requiring differential pressure switches. A wide range of switching options broadens the

applicability of the series.The H100K is a low cost, NEMA 4X differential pressure switch. The H117K also meets NEMA 4X and is the “Division 2” version of the H100K. Both

series offer a rugged one-piece enclosure and features a slanted cover for wiring accessibility. The J402K provides two, independent switches which may beseparated by as much as 95%. This would allow for alarm AND shutdown of a process. For hazardous locations, the 12K series provides an all stainlesssteel, cylindrical body configuration which is critical in compact systems where space is at a premium. Also, for hazardous locations the J120K andQJ120K meet UL, CSA and CENELEC standards respectively to protect equipment and personnel.

J120K/QJ120 meets requirements of Class 1, Div. 1 and CENELEC hazardous environments

H100K provides cost effective differential pressure control in general purpose and NEMA4X/IP65 applications

12K meets requirements of Class 1, Div. 1 andhazardous requirements CENELEC EEx d IIC T6

J402K provides cost effective differential pressure control and allows for two independentset points

Model Chart: H100K and J120K

Model Adjustable Range Deadband Range Max Working Proof Pressure

Pressure

low end on fall; high end on risewcd/psid mbar/bar wc/psi mbar/bar psi bar psi bar

540 0.2 to 7 "wcd 0,5 to 17,4 mbar 0.05 to 0.3 "wc 0,1 to 0,7 mbar 200 13,8 400 27,6541 1 to 20 "wcd 2,5 to 49,8 mbar 0.1 to 0.5 "wc 0,2 to 1,2 mbar 200 13,8 400 27,6542 5 to 50 "wcd 12,4 to 124,5 mbar 0.2 to 1.5 "wc 0,5 to 3,7 mbar 200 13,8 400 27,6543 10 to 200 "wcd 24,9 to 497,8 mbar 0.5 to 4.5 "wc 1,2 to 11,2 mbar 200 13,8 400 27,6544 2 to 20 psid 0,1 to 1,4 bar 0.1 to 0.6 psi 6 to 41,4 mbar 1200 82,7 2500 172,4545 5 to 50 psid 0,3 to 3,4 bar 0.2 to 1.2 psi 0 to 0,1 bar 1200 82,7 2500 172,4546 10 to 125 psid 0,7 to 8,6 bar 0.4 to 2.6 psi 0 to 0,2 bar 1200 82,7 2500 172,4547 50 to 250 psid 3,4 to 17,2 bar 0.8 to 5.3 psi 0,1 to 0,4 bar 1200 82,7 2500 172,4548 100 to 500 psid 6,9 to 34,5 bar 2.0 to 9.0 psi 0,1 to 0,6 bar 1200 82,7 2500 172,4

Epoxy coated aluminum housing with Kapton™ diaphragm, Buna-N sealing diaphragms and 1/8” NPT Female pressure connections.

Model Chart: 12K

Model Adjustable Range Deadband Range Max Working Proof Pressure

Pressure

low end on fall; high end on risewcd/psid mbar/bar wc/psi mbar/bar psi bar psi bar

K1 0.7 to 10 "wcd 1,7 to 24,9 mbar 0.2 to 1 "wc 0,5 to 2,5 mbar 200 13,8 400 27,6K2 2 to 20 "wcd 5,0 to 49,8 mbar 0.3 to 1.5 "wc 0,7 to 3,7 mbar 200 13,8 400 27,6K3 10 to 150 "wcd 24,9 to 373,4 mbar 0.3 to 5 "wc 0,7 to 12,4 mbar 200 13,8 400 27,6K4 2 to 20 psid 0,1 to 1,4 bar 0.3 to 1.5 psi 0 to 0,1 bar 1200 82,7 2,500 172,4K5 5 to 80 psid 0,3 to 5,5 bar 1 to 8 psi 0,1 to 0,6 bar 1200 82,7 2,500 172,4K6 10 to 150 psid 0,7 to 10,3 bar 1 to 10 psi 0,1 to 0,7 bar 1200 82,7 2,500 172,4

Epoxy coated aluminum housing with Kapton™ diaphragm, Buna-N sealing diaphragms and 1/8” NPT Female pressure connections.

Model Adjustable Range Deadband Range Max Working Proof Pressure

Pressure

low end on fall; high end on risewcd/psid mbar/bar wc/psi mbar/bar psi bar bar bar

540 0.8 to 7 "wcd 2 to 17,4 mbar 0.2 to 1.3 "wc 0,5 to 3,2 mbar 200 13,8 400 27,6541 2 to 20 wcd 5 to 49,8 mbar 0.3 to 1.6 "wc 0,7 to 4 mbar 200 13,8 400 27,6542 5 to 50 "wcd 12,4 to 124,5 mbar 0.3 to 4 "wc 0,7 to 10 mbar 200 13,8 400 27,6543 10 to 200 "wcd 24,9 to 497,8 mbar 0.8 to 12 "wc 2 to 29,9 mbar 200 13,8 400 27,6544 2 to 20 psid 0,1 to 1,4 bar 0.2 to 2 psi 0 to 0,1 bar 1200 82,7 2500 172,4545 5 to 50 psid 0,3 to 3,4 bar 0.4 to 3.2 psi 0 to 0,2 bar 1200 82,7 2500 172,4546 10 to 125 psid 0,7 to 8,6 bar 0.5 to 7 psi 0 to 7 bar 1200 82,7 2500 172,4547 50 to 250 psid 3,4 to 17,2 bar 2 to 15 psi 0,1 to 1 bar 1200 82,7 2500 172,4548 100 to 500 psid 6,9 to 34,5 bar 2 to 20 psi 0,1 to 1,4 bar 1200 82,7 2500 172,4

Model Chart: H117KEpoxy coated alumium housing with Kapton™ diaphragm, Buna-N sealing diaphragms and 1/8”” NPT Female pressure connections

NOTE: Set point repeats ±1 % of range for start-up vacuum (30” Hg VAC).

Specifications: 12K SeriesStorage temperature -65 to 160 (-54 to 71°C)

Ambient Temperature 0° to 160°F (-40 to 71°C); setpoint Limits typically shifts less than 1% of range for

a 50°F (28°C) ambient temperature change

Set Point Repeatability Sensor type K1-K3: +/- 1% of adjustable range spanSensor type K4-K6: +/- 1-1⁄2% of adjustable range span

Shock Set point repeats after 15 G, 10 milli-seconds duration

Vibration Set point repeats after 2.5 G, 5-500 Hz

Enclosure 300 series stainless steelSensor housing: epoxy coated aluminumwith 1⁄8" NPT Female pressure connections.Anodized Aluminum internal metallic parts.Kapton™ and Buna-N internal seals. Viton material is optional (replaces Buna-N seals).

Enclosure Classification Complies with NEMA 4X, 7, 9; IP66

Switch output Either: One, SPDT switch with factory sealed leadwires.Two, SPDT switches for DPDT action.

Electrical Rating Either: 5 amps 250 VAC resistive (choice H)1 amp 125 VAC resistive (choice L)

Approx. Weight Sensor type K1-K3: 5lbs 4 oz (2, 38 kg)Sensor type K4- K6: 3 lbs 6 oz (1, 53 kg)

Electrical Connection 1⁄2" NPT, M with 72" leadwires

Approvals Class I, Divisions 1 & 2; Groups A, B, C, DClass II, Divisions 1 & 2; Groups E, F, GClass IIIClass I, Zone 1, Group IICUL Listed, file # E40857; cUL certified file E40857CENELEC flame proof construction per EEx d IIC T6DEMKO certificate # 97D.122235Flameproof equipment, EN 50 014 and EN 50 018CE compliant to Low voltage directive

Model Adjustable Range Deadband Max Working Proof Switch

Range Pressure Pressure Separation

low end on fall; high end on risewcd/psid mbar/bar wc/psi mbar/bar psi bar psi bar

540 1 to 7 "wcd 2,5 to 17,4 mbar 0.1 to 1 "wc 0,2 to 2,5 mbar 200 13,8 400 27,6 95%541 2 to 20 "wcd 5,0 to 49,8 mbar 0.5 to 4 "wc 1,2 to 10 mbar 200 13,8 400 27,6 95%542 5 to 50 "wcd 12,4 to 124,5 mbar 0.5 to 10 "wc 1,2 to 24,9 mbar 200 13,8 400 2,6 95%543 15 to 100 "wcd 37,3 to 248,9 mbar 0.5 to 14 "wc 1,2 to 34,8 mbar 200 13,8 400 27,6 95%544 2 to 20 psid 0,1 to 1,4 bar 1 to 5 psi 0,1 to 0,3 bar 1,200 82,7 2,500 172,4 95%545 5 to 50 psid 0,3 to 3,4 bar 1 to 6 psi 0,1 to 0,4 bar 1,200 82,7 2,500 172,4 95%546 10 to 100 psid 0,7 to 6,9 bar 1 to 10 psi 0,1 to 0,7 bar 1,200 82,7 2,500 172,4 95%547 20 to 200 psid 1,4 to 13,8 bar 1 to 14 psi 0,1 to 1,0 bar 1,200 82,7 2,500 172,4 95%

Model Chart: J402KEpoxy coated alumium housing with Kapton diaphragm, Buna-N sealing diaphragms and 1/8”” NPT Female pressure connections.

Specifications: H100K SeriesStorage temperature -65 to 160 (-54 to 71°C)

Ambient Temperature 0° to 160°F (-40 to 71°C); setpoint Limits typically shifts less than 1% of range for

a 50°F (28°C) ambient temperature change

Set Point Repeatability Models 540-543 ± 1% of adjustable range; models 544-548 ± 11⁄2% of adjustable rangeInternal set point lock on all models

Shock Set point repeats after 15 G, 10 milli-seconds duration

Vibration Set point repeats after 2.5 G, 5-500 Hz

Enclosure Die cast aluminum (max. 0.6% copper), epoxy powder coated, gasketed, captive cover screwsSensor housing: epoxy coated aluminum with 1⁄8" NPT Female pressure connections. Anodized Aluminum internal metallic parts. Kapton™ and Buna-N-internal seals. Viton material is optional (replaces Buna-N seals).

Enclosure Complies with NEMA 4X; Classification IP65 requirements

Switch output One SPDT snap action switch; switch may be wired “normally open” or “normally closed”

Electrical Rating 15 amps 125/250/480 VAC resistive

Approx. Weight H100K models 540-543: 6 lbs (2, 7 kg); models 544-548: 4 lbs (1, 8 kg)

Electrical Connection 1⁄2" NPT; two 7⁄8" diameter knockouts

Approvals UL listedUL 508, file # E42272CSA certifiedC22.2, no 14 file # LR39690CE compliant to Low voltage directive

Switch output One SPDT snap action switch; switch may be wired “normally open” or “normally closed”

Electrical Rating 15 amps 125/250/480 VAC resistive

Approx. Weight J120K, QJ120K models 540-543: 8.5 lbs (3, 9 kg) models 544-548: 6.5 lbs (3 kg)

Electrical Connection 3/4” NPT; terminal block standard

Approvals Class I, Division 1 & 2, Groups B, C, and D: Class II, Division 1 & 2, Groups E, F, and G; Class IIIUL listedUL 508, UL 698,file # E40857CSA certifiedCSA C22.2 no. 14, 25, 30file #LR39690CENELECFlame proof construction per EEx d IIC T6,IP66 EN 50 014/50 018 (Specify Option “Q”)CE compliant to Low voltage directive

Storage temperature -65 to 160 (-54 to 71°C)

Ambient Temperature 0° to 160°F (-40° to 71°C); set point typically shifts less than 1%of range for a 50°F (28°C) ambient temperature change

Set Point Repeatability Models 540-543 ± 1% of adjustable range; models 544-548 ± 11⁄2% of adjustable rangeInternal set point lock on all models

Shock Set point repeats after 15 G, 10 milli-seconds duration

Vibration Set point repeats after 2.5 G, 5-500 Hz

Enclosure Die cast aluminum (max. 0.4% copper), epoxy powder coated; gasketed; aluminum nameplateSensor housing: epoxy coated aluminum with 1⁄8" NPT Female pressure connections. Anodized Aluminum internal metallic parts. Kapton™ and Buna-N-internal seals. Viton material is optional (replaces Buna-N seals).

Enclosure Complies with NEMA 4X, 7, 9; IP66 Classification requirements

Specifications: J120K Series

Specifications: J402K SeriesStorage temperature -65 to 160 (-54 to 71°C)

Ambient Temperature 0° to 160°F (-40 to 71°C); setpoint Limits typically shifts less than 1% of range for

a 50°F (28°C) ambient temperature change

Set Point Repeatability Models 540-543 ± 1% of adjustable range span; models 544-547 ± 1 1/2% of adjustable range span

Shock Set point repeats after 15 G, 10 milli-seconds duration

Vibration Set point repeats after 2.5 G, 5-500 Hz

Enclosure Die cast aluminum (max. 0.6% copper), epoxy powder coated, gasketed, captive cover screwsSensor housing: epoxy coated aluminum with 1⁄8" NPT Female pressure connections. Anodized Aluminum internal metallic parts. Kapton™ and Buna-N-internal seals. Viton material is optional (replacing Buna-N Seals).

Enclosure Complies with NEMA 4X; Classification IP65 requirements

Switch output Two SPDT snap action switches; switches may be wired “normally open” or “normally closed”. Up to 95% switch separation may be achieved

Electrical Rating 15 amps 125/250/480 VAC resistive

Approx. Weight J402K models 540-543: 6 lbs (2, 7 kg); J402K models 544-547: 4 lbs (1, 8 kg)

Electrical Connection Three 7⁄8" diameter knockouts

Approvals UL listedUL 508, file # E42272CSA certifiedC22.2, no 14 file # LR39690

12 Series - *shown with sensor models K1-K3

Drawings

H100K Series - *shown with sensor models 544-548

Drawings

H117K Series - *shown with sensor models 544-548

NOTE: *All models are available with all types.

J120K & QJ120K Series - *shown with sensor models 540-543

J402K Series - *shown with sensor models 540-543

Drawings

Code Description 0140 Gold flashed contacts, 1 amp 125 VAC resistive0500 Close deadband, 5 amp 125/250 VAC resistive1180 Hermetically sealed, 11 amp 125/250 VAC resistive; deadband and minimum set point will increase. Available on

QJ120K, J120K only1190 Hermetically sealed, DPDT, 11 amp 125/250 VAC; products set on rising pressure due to inherent. separation of circuits

on falling pressure; specify option 1195 if setting on fall is required; deadband and minimum set point will increase 1195 Hermetically sealed, DPDT, 11 amp 125/250 VAC; products set on falling pressure; specify option 1190 if setting on rise is

required; deadband and minimum set point will increase. Available on H117K, QJ120K, J120K only1519 Adjustable deadband, 15 amp 125/250/480 VAC resistive; adjustment changes rise setting only1520 Adjustable deadband 15 amp @ 277VAC resistive, 1530 External manual reset, 15 amp 125/250/480 VAC resistive; reset on increasing pressure. Available on J120K, H100K only1535 High ambient, 15 amp 125/250 VAC resistive; temperatures up to 250°F/145°C1537 Vapor seald switch, 15 amp 125/250 VAC resistive. Available on 100K, J120K and QJ120K only1539 Fungus resistant case, 15 amp 125/250 VAC resistive. Available on QJ120K, J120K only

Switch Options

Code Description M020 Red status light, 115 VAC only; specify whether light turns on or off with increasing or decreasing pressure. Available on H100K onlyM201 Factory set one switch; specify increasing or decreasing pressure and set point M202 Set two switches (J402K only)M276 Range indicated on nameplate in barsM277 Range in KPa on nameplateM278 Range indicated on nameplate in Kg/cm2M430 Cover lock (12K series only)M440 Cover chain (J120K only) M444 Paper ID tagM446 Stainless steel ID tag & wire attachment (attachment will vary depending on product)M450 Breather drain (J120K only)M460 External grounding screw (12K series only)M513 Junction box, pre-wired (12K series only)M540 Viton construction (deadbands will increase approximately 15% and low end of range will increase by 10%)

Wetted parts include Viton sealing diaphragms and O-ring plus Kapton diaphragmM550 Oxygen service cleaning; (all Buna-N seals changed to Viton similar to option M540)62169-13 Mounting bracket kit (12K series only)6361-694 Junction box and terminal kit; not pre-wired6361-704 Mounting bracket kit (all others)

General Options

How To Order

❏ ❏ ❏ ❏ ❏ ❏ ❏ ❏ ❏ ✽ ❏ ❏ ❏ ❏

Select a Type

H100K = NEMA 4X/IP65, general purpose, internal adjustmentwith reference scale

H117K = NEMA 4X/IP65, Division 2,internal adjustment with reference scale

J120K = Division 1 approved,NEMA 4X, 7, 9 internal adjustment with reference scale

QJ120K = CENELEC approved, IP66, internal adjustment with reference scale

Select a Model Select an Option

Refer to Model Chart See Previous Page

Build a part number by selecting a type, model and options. Choose the Model Type and the Range from the Model Chart . If options are required, add the code from the option list below. Example: QJ120K 543 * M201.

12 Series “WCD Pressure Switch

Housing Electrical Number Electrical Sensor ModelSeries Materials Rating of Switches Conduit Type (Range) Options

12 S=Stainless L=1 amp S=SPDT N=1⁄2" NPTM K = Kapton™ diaphragm, 1=0.7 to 10 "WCDSteel H=5 amp D=DPDT M=M20 Buna-N sealing 2=2 to 20 "WCD

diaphragms, 1⁄8" NPT 3=10 to 150 "WCDfemale pressure 4=2 to 20 psidconnections 5=5 to 80 psid

6=10 to 150 psid

RECOMMENDED PRACTICES AND WARNINGS

United Electric Controls Company recommends careful consideration of the following factors when specifying and installing UE pressure and temperatureunits. Before installing a unit, the Installation and Maintenance instructions provided with unit must be read and understood.

• To avoid damaging unit, proof pressure and maximum temperature limitsstated in literature and on nameplates must never be exceeded, even by surges inthe system. Operation of the unit up to maximum temperature is acceptable on alimited basis (i.e., start-up, testing) but continuous operation must be restrictedto the designated adjustable range. Excessive cycling at maximum temperature limits could reduce sensor life.

• A back-up unit is necessary for applications where damage to a primaryunit could endanger life, limb or property. A high or low limit switch is necessaryfor applications where a dangerous runaway condition could result.

• The adjustable range must be selected so that incorrect, inadvertent or malicious setting at any range point can not result in an unsafe system condition.

• Install unit where shock, vibration and ambient temperature fluctuations willnot damage unit or affect operation. Orient unit so that moisture does not enterthe enclosure via the electrical connection. When appropriate, this entry pointshould be sealed to prevent moisture entry.

• Unit must not be altered or modified after shipment. Consult UE if modification is necessary.

• Monitor operation to observe warning signs of possible damage to unit,such as drift in set point. Check unit immediately.

• Preventative maintenance and periodic testing is necessary for critical applications where damage could endanger property or personnel.

• For all applications, a factory set unit should be tested before use.• Electrical ratings stated in literature and on nameplate must not be exceeded.

Overload on a switch can cause damage, even on the first cycle. Wire unit according to local and national electrical codes, using wire size recommended ininstallation sheet.

• Use only factory authorized replacement parts and procedures. • Do not mount unit in ambient temp. exceeding published limits.

LIMITED WARRANTY OF REPAIR ANDREPLACEMENT UE warrants that the product hereby purchased is, upon delivery, free fromdefects in material and workmanship and that any such product which is found tobe defective in such workmanship or material will be repaired or replaced by UE(F.O.B. UE); provided, however, that this warranty applies only to equipmentfound to be so defective within a period of 12 months after delivery by the seller.UE shall not be obligated under this warranty for alleged defects which examina-tion discloses are due to tampering, misuse, neglect, improper storage, and inany case where products are disassembled by anyone other than authorized UE representatives. EXCEPT FOR THE LIMITED WARRANTY OF REPAIR AND REPLACEMENT STATED ABOVE, UE DISCLAIMS ALL WARRANTIES WHATSOEVER WITHRESPECT TO THE PRODUCT, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE.

LIABILITY LIMITATIONSELLER’S LIABILITY TO BUYER FOR ANY LOSS OR CLAIM, INCLUDING LIABILITY INCURRED IN CONNECTION WITH (I) BREACH OF ANY WARRANTYWHATSOEVER EXPRESSED OR IMPLIED, (II) A BREACH OF CONTRACT, (III) ANEGLIGENT ACT OR ACTS (OR NEGLIGENT FAILURE TO ACT) COMMITTED BYSELLER, OR (IV) AN ACT FOR WHICH STRICT LIABILITY WILL BE IMPUTED TOSELLER, IS LIMITED TO THE LIMITED WARRANTY OF REPAIR AND REPLACE-MENT STATED HEREIN. IN NO EVENT SHALL THE SELLER BE LIABLE FOR ANYSPECIAL, INDIRECT, CONSEQUENTIAL OR OTHER DAMAGES OF A LIKE GENERAL NATURE, INCLUDING, WITHOUT LIMITATION, LOSS OF PROFITS ORPRODUCTION, OR LOSS OR EXPENSES OF ANY NATURE INCURRED BY THEBUYER OR ANY THIRD PARTY.

Notes:

180 Dexter Avenue, P.O. Box 9143Watertown, MA 02471-9143 USATelephone: 617 926-1000 Fax: 617 926-2568http://www.ueonline.com

U N I T E D E L E C T R I CC O N T R O L S

INTERNATIONAL OFFICES

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