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J120 Series Overview
Rugged, Explosion-proof Pressure, Vacuum, Differential Pressure and Temperature Switches
As safety requirements become more stringent, the determining factor in specifying an industrial pressure, differential pressure and/or temperature switch rests upon that switch protecting equipment, processes and personnel. Meeting hazardous location requirements through worldwide approvals and certifications, UE’s 120 Series is the choice where potentially explosive or highly corrosive atmospheres exist.
The 120 Series offers a variety of pressure, vacuum, differential pressure and temperature ranges, as well as process connections, wetted materials and sensor types. With a common flexible platform, models can quickly be adapted at the factory for special requirements, such as ranges, process connections and electrical ratings. Typical industries using 120 Series switches include chemical, petrochemical, refinery, oil and gas production and transmission, and pharmaceuticals.
Specifications:
Storage Temperature -65 to 160°F (-54 to 71°C)
Ambient Temperature -58 to 160°F (-50 to 71°C); models 36-39, 520-525, 540-548, 701-705, 15834-15839:
Limits 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 Temperature models: Type B, C and F: ±1% of full scale range
Repeatability Type E: ±2% of full scale range
Pressure models 126-164, S126B-S164B, 171-174, 270-274, 358-376, 520-535,
540- 543, 560-564, 701-705, 15622, 15834,-15839: ±1% of full scale range; models
450-559: ±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; coverlock; 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”. Two SPDT hermetic sealed
switches available on H122P models
Electrical rating 15A 125/250/480 VAC resistive (standard) except types J120-15622, 15834-15839,
H121-15875: 20A 125/250/480 VAC resistive; H122P; 11A 125/250 VAC resistive;
B121-13272, B122-13322, E121-13273, E122-13321; 22A 480VAC resistive. Electrical
switches have limited DC capabilities. Consult factory for additional information
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
560-564: 2" flush mount connection; 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; Immersion stem: nickel-plated brass (standard) except for
B121- 3272 and B122-13322: stainless steel. Fill: Model 1BS: solvent filled; models
2BS-8BS: non-toxic oil filled
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 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)
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
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