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  2. UE Controls 120 series Explosion- Proof Pressure, Vacuum, Differential Pressure and Temperature Switches. (820E-822E)

UE Controls 120 series Explosion- Proof Pressure, Vacuum, Differential Pressure and Temperature Switches. (820E-822E)

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Heavy industrial processes rely on 120 Series pressure and temperature switches to protect equipment and personnel while preserving process uptime. The 120 Series is simple to install in hazardous location areas and perform critical alarm, safety and emergency shutdown functions.

Type 820E - Bulb and capillary; one SPDT; external adjustment and temperature indication, dual conduits
Type 822E - Bulb and capillary; two SPDT; external adjustment and temperature indication, dual conduits

  • 120 sensor type
  • Model 2BS-8BS

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United Electric Controls
Pressure switches, temperature switches, thermocouples, RTDs, pressure and temperature transmitters, gas detection

The 120 Series offers a variety of pressure, vacuum, differential pressure and temperature ranges, as well as process connections, wetted materials and sensor types.

Typical applications that utilize the 120 Series include rotating equipment such as pumps, turbines, and compressors, heat tracing, combustion systems, and oil, gas and chemical processing.

Parameters available in the datasheet of the documents section


Specifications for UE Controls 120 series Explosion- Proof Pressure, Vacuum, Differential Pressure and Temperature Switches. (820E-822E)

120 sensor type 820E - Bulb and capillary; one SPDT; external adjustment and temperature indication, dual conduits Type or 822E - Bulb and capillary; two SPDT; external adjustment and temperature indication, dual conduits
Model 2BS-8BS Not selected or 2BS or 3BS or 4BS or 5BS or 6BS or 7BS or 8BS
UEONLINE 120 Series Datasheet.pdf
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  • Standard product approvals include cULus, ATEX & IECEx
  • Optional approvals for Russia, Ukraine, China, India, Korea, Brazil and Taiwan
  • SIL2 Certified per IEC 61508:2010
  • Many models compliant to NACE MR0175
  • Internal adjustment hex screw or external adjustment via calibrated dial(s) with tamper-resistant cover
  • Integral cover lock
  • SPDT, DPDT or dual SPDT output
  • Optional hermetically sealed micro-switch
  • Wide variety of sensor materials
  • Optional Hastelloy® and Monel® sensor material for corrosive media
  • Wide adjustable deadband models
  • Heat tracing temperature models


  • STORAGE TEMPERATURE: -65 to 160°F (-54 to 71°C)
  • AMBIENT TEMPERATURE LIMITS: -58 to 160°F (-50 to 71°C); models 36-39, 520-525, 540-548, 701-705, 15834-15839: 0 to 160°F (-17 to 71°C); types 820E, 822E: -40 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; less than 2% for types E121& E122
  • SET POINT REPEATABILITY: Temperature models: Type B, C and F: ±1% of full scale range Type E: ±2% of full scale range Pressure models 126-164, S126B-S164B, 171-174, 270- 274, 358-376, 520-535, 540- 543, 701-705, 15622, 15834,-15839: ±1% of full scale range; models 450- 457, 550-559: ±1/2% of full scale range; models 36-39, 183-194, 483-494, 544- 548, 565-567, 612-680, 15875: ±1-1/2% of full scale range
  • SHOCK: Set point repeats after 15 G, 10 millisecond duration
  • VIBRATION: Set point repeats after 2.5 G, 5-500 Hz
  • ENCLOSURE: Die cast aluminum, epoxy powder coated; gasketed; cover lock; internal set point lock standard on types J, C, F; gasketed stainless steel tamper-resistant dial cover on types B, H, E; aluminum nameplate
  • ENCLOSURE CLASSIFICATION: Certified to enclosure type 4X. Class I, Division 1 product meets enclosure type 7; Class II, Division 1 product meets enclosure type 9. Certified to IP66 requirements
  • SWITCH OUTPUT: One or two SPDT; dual switch may be separated up to 100% of range; except type 822E where switch #2 can be set up to 25% of range span below switch #1 setpoint; switches may be wired “normally open” or “normally closed”.
  • ELECTRICAL RATING*: 15A 125/250/480 VAC resistive (standard), 2A @ 30 VDC, 1A @ 48 VDC, 0.5A @ 125 VDC; except types J120-15622, 15834-15839, H121-15875: 20A 125/250/480 VAC resistive, 6A @ 30 VDC, 0.5A @ 125 VDC, 0.25A @ 250 VDC; except types B121- 13272, B122-13322, E121-13273, E122-13321: 22A 480 VAC resistive, 2A @ 30 VDC, 1A @ 48 VDC, 0.4A @ 125 VDC.
  • REFERENCE SCALES: Types B, E & H: external dial. Scale divisions vary with range (see model charts) WEIGHT 3-8 lbs. Varies with type and model
  • ELECTRICAL CONNECTION: Type H, B, E; one 3/4" NPT E/C; type J, C, F, 820E, 822E; two 3/4" NPT E/C; terminal block standard
  • PRESSURE CONNECTION: Models S126B-S164B, 171-194, 483-494, 520-535: 1/2" NPT (female); models 565-567: 1-1 ⁄ 2" flush mount connection; models 540-548: 1/8" NPT (female); all others: 1/4" NPT(female)
  • TEMPERATURE ASSEMBLY: Bulb and capillary: 6 feet 304 stainless steel (standard) except for E121-13273 and E122-13321: 10 feet; Fill: Non-toxic oil filled Immersion stem: Nickel-plated brass (standard) except for B121-13272 and B122-13322: stainless steel.
  • TEMPERATURE DEADBAND: Type F120, 820E, 822E: typically 1%; type B-, C-, and E- 121 and 122: typically 2% of range under laboratory conditions (70°F [21°C] ambient circulating bath at rate of 1/2°F per minute change)
  • PRESSURE DEADBAND: See individual model charts on pages 6-14. Consult UE for deadbands on switch options
  • DIFFERENTIAL PRESSURE: Differential pressure indication available types H121K and H122K with option M210
  • INDICATOR: (OPTION M210) (check model availability under options); accuracy approximately 1% mid 50% of range, 3% at ends; window is plexiglass and gasketed; indicator may be field adjusted for approximately ±1% accuracy at any set point within range
  • TEMPERATURE INDICATION: Temperature indication available types 820E and 822E. Indication accuracy is ±1% of adjustable range



UE declarations and third-party issued certifications are available for download at www.ueonline.com/certs

UNITED STATES AND CANADA

  • Class I, Division 1 and 2, Groups B, C & D
  • Class II, Division 1 and 2, Groups E, F & G
  • Class III
  • Class I, Zone 1, Group IIB + H2 T6
  • Tamb: -50°C to 71°C
  • Enclosure Type 4X per
  • UL 50 (USA), IP66 per EN 60529 (Canada) UL Listed (USA), cUL Listed (Canada)
  • Pressure: 1203; CSA C22.2
  • No. 25 & 30 - File # E40857
  • Temperature: 1203; CSA C22.2
  • No. 25 & 30 - File # E43374
  •  Canadian registration number (CRN) for Canadian provinces can be found at www.ueonline.com

EUROPE

  • ATEX Directive (2014/34/EU)
  • II 2 G Ex db IIC T6 Gb
  • II 2 D Ex tb IIIC T85°C Db IP66
  • Tamb = -40°C to +75°C
  • UL International DEMKO A/S (N.B.# 0539)
  • Certificate # DEMKO 09 ATEX 0815573X
  • EN 60079-0, 60079-1, 60079-31
  • II 1 G Ex ia IIC T6 Ga (OPTIONAL – code M405)
  • (not available types 820E, 822E)
  • Tamb = -50°C < Tamb < +60°C
  • UL International DEMKO A/S (N.B.# 0539)
  • Certificate # DEMKO 11 ATEX 1105261X
  • EN 60079-0, 60079-11

Pressure Equipment Directive (PED) (2014/68/EU)

  • Compliant to PED UL 508, UL 61010
  • Products rated lower than 7.5 psi are outside the scope of the PED

Low Voltage Directive (LVD) (2014/35/EU)

  •  UEC compliant to LVD EN 61058-1, EN 61010-1
  • Products rated lower than 50 VAC and 75 VDC are outside of the scope of the LVD
  •  The Low Voltage Directive does not apply to products for use in hazardous locations

RUSSIA

  • (OPTIONAL – code M406)
  • Certificate ТС RU-C-US.ГБ05.B.01185
  • NANIO CCVE Certified
  • Type 120, 121 and 122
  • 0Ex ia IIC T6 Ga X
  • Tamb:-50°C to + 60°C
  • ГОСТ Р МЭК 60079-11-2010; ГОСТ Р
  • МЭК 60079-0-2011; ГОСТ 31610.26-2012/
  • IEC 60079-26-2006
  • Type 120, 121 and 122,820 &822
  •  1Ex d IIC T6 Gb X
  • Tamb:-40°C to + 75°C
  • ГОСТ IEC 60079-1-2011; ГОСТ Р МЭК
  •  60079-0-2011

UKRAINE

  •  Gosnadzorohrantruda Permit (OPTIONALcode M404)
  •  СВIДОЦТВО #720 by DVSTS VE (TCCExEE)
  • 1ExdIICT6X
  • Tamb = -56°C to +85°C (types 120, 121 & 122)
  • Tamb = -40°C to +71°C (types 820 & 822)
  • ГOCT 12.2.007.0, ГOCT 22782.0, ГOCT 22782.6

CHINA

  •  CQST Certified (OPTIONAL – code M408) }
  • (120,121,122)Pressure: CNEx15.2540X
  • (120,121,122,820,822)Temperature:
  •  CNEx15.2541X
  • Ex d IIC T6 Gb
  • Ex tD A21 T+85°C IP66
  • Tamb. = -40°C to +75°C
  • GB3836.1,GB3836.2 & GB12476

INTERNATIONAL CERTIFICATION* (INCLUDES AUSTRALIA)

  • IECEx Certified
  • Ex d IIC T6 Gb
  • Ex tb IIIC T85°C Db IP66
  •  Tamb. = -40°C to +75°C
  • IEC 60079-0, 60079-1, 60079-31
  • Certificate # IECEx UL 03.0001X
  • Ex ia IIC T6 Ga
  • IEC 60079-0, 60079-11
  • Certificate # IECEx UL 14.0075X

INDIA

  • Ex d IIC T6 Gb
  •  PESO: CCEs Identification# P314108/1
  • EN 60079-0, 60079-1, 60079-31
  • Ex ia IIC T6 Ga (OPTIONAL – code M405)
  • PESO: CCEs Identification# P305465/1
  • EN 60079-0, 60079-11

KOREA

  • KOSHA, Article 34 of Industrial Safety and Health Law (OPTIONAL – code M395)
  •  Ex d IIC T6
  • -40°C < Tamb < +75°C
  • Pressure: Certification# 10-AV4BO-0710 for J120, H121, H122, H122P
  • Differential Pressure: Certification# 10-AV4BO-0711 for J120K, H121K, H122K
  •  Temperature: Certification# 10-AV4BO-0712 for (B.E) (121, 122)/C120/F120
  • Temperature Certification # 10-AV4BO-712 for 820E/822E

BRAZIL

  • INMETRO(OPTIONAL – code M391)
  • Ex d IIC T6 Gb
  • Ex tb IIIC T85°C Db IP66
  • -40°C ≤ Ta ≤ +75°C
  • UL-BR 15.0179X
  • ABNT NBR IEC 60079-0
  • ABNT NBR IEC 60079-1
  • ABNT NBR IEC 60079-31
  • Ex ia IIC T6 Ga
  • -50°C ≤ Ta ≤ +60°C
  • UL-BR 15.0169X  
  • ABNT NBR IEC 60079-0
  •  ABNT NBR IEC 60079-11
  •  ABNT NBR IEC 60079-26

TAIWAN*

  •  ITRI
  • Temperature Switch - ML041200701BZ4
  •  Pressure Switch – ML041200701AE7,
  • ML041200701BY3, ML041200701C40, ML041200701D31


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UE Controls 120 series Explosion- Proof Pressure, Vacuum, Differential Pressure and Temperature Switches. (820E-822E)