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.







Product Overview




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

Adjustable ranges:

       ◦ -130 to 650ºF

          -90 to 340ºC

  Approvals: UL, CSA, CE

  JIT Delivery







  Single or dual 15 A switch output

Skeleton or Enclosure construction

      designed to meet NEMA Type 4X

Optional external manual reset

Compact size

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

                                                       additional information


Electrical  Connection             1/2” NPT (female) (E55 and E55A)


Weight                                        Types E55S, E55AS (skeleton): approximately 12 oz.; Types E55, E55A: approximately

                                                       1 lb.


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)







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