As an easy guide, here’s a simple capillary cross reference guide to help find the correct switch. If you have one of the series or part numbers listed below, simply match it to our series. Give us a call for for more information.

Senasys supplies a variety of capillary switches including adjustable temperatures or fixed. Senasys thermostat switches are UL and CUL Recognized. All switches are made in the United States and our direct customer service would be happy to help you find the right switch for your application.

Capillary switches are commonly used in food equipment applications as a limit or control. Other common applications include HVAC equipment or pool/spa.

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Can’t find your part number listed? Give our direct support a call with your switch or application requirements and one of our customer service representatives will assist you!

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Capillary Cross Reference Guide

Senasys Capillary Switch Series Other Capillary Switch Series Capillary Switch Description
351 Series or 358 Series A19 Series Remote Bulb Control by Johnson Controls These temperature controls  are available with SPST switches that open high or open low. Models are also available with SPDT switches that can be wired for open high or open low applications. The controls are
available with fixed (factory set) or adjustable (screw or knob). Various control ranges are available to cover working
temperatures from 0°F-700°F.Features
• Constant differential throughout the entire range
• Compact enclosure
• Variety of sensing element styles
• Unaffected by cross-ambient conditions
• Auto or Manual Reset
351 Series PECO T103, T125 Electromechanical component thermostat available in adjustable and fixed setting models. SPDT switching capability up to 25 Amps. Bulb and capillary sensor is available with optional fittings and finishes.
351 Series Honeywell Remote Temperature Controllers, Series: T4031, T6031, L480 For limit or temperature control where remote mounting of sensing element is required. These temperature controls are SPST or SPDT, manual or auto reset.

Features
• Liquid-filled  elements provide rapid sensing to control the system.
• Control temperature in a duct, tank, freezer or cooler (0°F-700°F).
• Controller element can be directly immersed in the controlled medium.
• Adjustable or fixed control setpoint.
• Ambient temperature compensation provides good temperature control.

351 Series Selco CAP Series, The CAP and CAP-MR series are commercial and domestic electric thermostats for heating and cooling applications. These 20 amp snap acting switches are SPST or SPDT available in auto reset. The remote bulb and capillary are available in copper or stainless steel in lengths up to 13 feet. They are used in a variety of liquid or air applications as a regulating control, high limit or trip free device. Many models available from stock or built to your specification. Selco’s hot capillary thermostats.
351 Series Langir Electric – WK Series Elements: The volume of the material in the temperature sensing part of temperature controller will expand or contract when the temperature of the controlled object varies, which causes the film box that is connected to the temperature sensing component, which drives the switch on or off through a leverage function to keep a constant temperature. WK Series Liquid Inflated Temperature Controller is characterized by accurate temperature control, reliable, small on/off temperatures difference, a wide range of temperature control and large over loaded current etc.

Electric Performance: 16 (3) A-250V ~ 10 (1.8) A-400V
Switch-Off Temperature: in the range of -35℃ to +320℃ based on clients demand
Life of Usage: >100,000 times
Electric Intensity: AC2000V/1min
Normal Insulated Resistance: ≥100MΩ
Contact Resistance: ≤50mΩ
Wet Insulated Resistance: ≥10MΩ
Temperature Response Rate: ≤1.0℃/min
Min. Current: 200mA

351 Series EGO Products Single-Pole Thermostats EGO single-pole thermostats and limiters. With a design designed to maximize flexibility, the EGO single-pole thermostats and safety temperature limiters can be supplied for any application requiring electrical circuitry. The designs differ mainly in the following features:
352 Series Honeywell Remote Temperature Controllers L482 / Selco / Tempco / Robertshaw / Whitman Controls / Barksdale Senasys offers the addition of a second switch, which opens the range of applications for a capillary thermostat, 352 series. The two switches can be any combination of a single pole, double throw (SPDT) automatic reset; or a single pole, single throw (SPST) manual reset. The 352 series differential can be factory set very close for a double pole application or widened out for multistage applications.
352 Series EGO Products Multi-Pole Thermostats EGO multipolar thermostats and limiters.
With a design designed to maximize flexibility, the EGO Multipole Thermostats and Safety Temperature Limiters can be supplied for any application requiring up to four electrical circuits or more electrical power. The designs differ mainly in the following features:
354 Series PECO L117, L107 Electromechanical component thermostat available in fixed setting models.

SPST manual reset switching capability up to 30 Amps in addition to SPDT switching capability up to 25 Amps. Bulb and capillary sensor is available with optional fittings and finishes. Sensor has “negative bias” construction that provides for switch open upon bulb or capillary rupture.

354 Series  Selco CAP-MR Series The CAP and CAP-MR series are commercial and domestic electric thermostats for heating and cooling applications. These 20 amp snap acting switches are SPST or SPDT available in manual reset. The remote bulb and capillary are available in copper or stainless steel in lengths up to 13 feet. They are used in a variety of liquid or air applications as a regulating control, high limit or trip free device. Many models available from stock or built to your specification. Selco’s hot capillary thermostats.

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Bulb & Capillary Thermostats

Original equipment manufacturers worldwide use thermostat switches designed and manufactured by STEMCO, a Division of Senasys. No matter which style or model you choose, all of the capillary thermostat switches operate using the same physics. A fluid is encapsulated in a metal and when the temperature changes the fluid either expands or contracts. This fluid change moves a diaphragm which is in touch with a snap action switch and either opens or closes a circuit.

Ambient Compensation

Our capillary thermostats can be ambient compensated to offset the differential in temperature which keeps our thermostat controls more accurate as it’s environment changes.

Custom Options

Capillary thermostat switches built by Senasys can also be built to customer specifications. This insures you get the exact control you want without paying for features you don’t need.