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United Electric Controls
A Message From The CEO
United Electric Controls has more than 80 years of proven experience providing rugged pressure and temperature electromechanical and electronic switches to Chemical & Petrochemical, Power, Water & Wastewater and Oil & Gas industries, as well as many other challenging OEM applications.
UE pressure switches, pressure transducers and pressure transmitters, temperature switches and temperature sensors are designed for rugged, industrial environments.
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United Electric Controls has more than 150 distributors worldwide. Please visit our distributor locator page to find a distributor near you.
Three Manufacturing Divisions
Lean manufacturing for maximum productivity
Operational excellence (OpX) reduces waste
One-piece-flow for optimum manufacturing efficiency
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United Electric Controls Company
180 Dexter Ave
Watertown, MA 02472-4200
Dec. 12-13, 2017 - CH4 Connections, The Methane Emissions Conference,
Fort Collins, CO, USA
January 23-25, 2018 - Energy Generation Conference, Bismark, ND, USA
January 23-25, 2018 - TAMU Instrumentation Symposium, College Station, TX, USA
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55 Series Temperature Switch
The E55 Series provides rugged, dependable temperature control for many applications. Available in single or dual output versions, with either an epoxy coated enclosure (designed to meet NEMA Type 4X) or skeleton construction, the E55 combines flexibility with compact size. It has been used in diverse applications such as food service appliances, oven control, and heat tracing.
E55 Series Remote Mounting Temperature Switch and Control
NEMA 4 or open frame construction
SPDT or dual switch output
Panel or surface mount
Copper or stainless steel bulb and capillary
◦ -130 to 650ºF
-90 to 340ºC
Approvals: UL, CSA, CE
Single or dual 15 A switch output
Skeleton or Enclosure construction
designed to meet NEMA Type 4X
Optional external manual reset
Copper or stainless steel bulb & capillary
Storage Temperature -65 to 160°F (-54 to 71°C)
Ambient Temperature -40 to 160°F (-40 to 71°C); set point typically shifts less than 1% of range for a 50°F
Limits (28°C) ambient temperature change
Set point Repeatability ± 1% of adjustable 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 with stainless steel, gasketed adjustment
cover (E55 and E55A)
Enclosure Classification Type E55 & E55A: Designed to meet enclosure type 4X requirements Types E55S &
E55AS: Skeleton, open frame construction, not applicable
Switch output One or two SPDT; dual switch may be separated up to 100% of range; switches may be
wired “normally open” or “normally closed”
Electrical rating 15 A 125/250/480 VAC resistive; 22 A 480 VAC for E55-R25HT and E55-L24HT heat
trace models. Electrical switches have limited DC capabilities. Consult factory for
Electrical Connection 1/2” NPT (female) (E55 and E55A)
Weight Types E55S, E55AS (skeleton): approximately 12 oz.; Types E55, E55A: approximately
Bulb & Capillary Models E20BC - E23BC: 6 feet copper;
Models E20BS - E23BS: 6 feet stainless steel
Model R25HT: 10 feet stainless steel
Model L24HT: stainless steel, Local sensor, no capillary, for ambient sensing
Temperature Fill Non-toxic oil filled
Temperature Deadband Typically 1% of range under laboratory conditions (70°F circulating bath at rate of 1/2°F
per minute change)
55 Series Customer Drawings
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180 Dexter Avenue, Watertown, MA 02472-4200
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