stemco

Single Stage Capillary Thermostats

Senasys offers a wide range of single stage capillary thermostats and double throw capillary thermostats. Available field adjustable or fixed, the capillary thermostats can be manually or automatically reset. These high limit switches are highly versatile, carrying up to 25 amps. The capillary thermostat has a temperature range of 0°F-700°F, with a maximum ambient temperature up to 250°F.

quality ambient compensation

Our capillary thermostats also offer the option of being ambient compensated to offset the differential in temperature which keeps our thermostat controls more accurate as it’s environment changes.

certified

Senasys takes pride in quality control and reliable operation of our products. Every switch is individually 100% tested before it leaves the plant. Our capillary thermostats are UL & cUL approved.

custom options

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

MADE IN THE U.S.A.

Products are designed, manufactured, tested and shipped from Senasys’ facilities in Eau Claire, WI to clients across the globe. Every switch is individually 100% tested before it leaves the plant.

Capillary Thermostat 351-254530
Bulb and Capillary 351-253956

351 Series

The 351 series Capillary Thermostat is our most versatile line of remote sensing thermostats available in Bulb and Capillary Tube or Probe styles. Many variations are available in each style to include fixed or adjustable temperatures, auto or manual resets, Copper/Plated Copper or Stainless steel construction and all variations have multiple mounting options.

The fixed temperature models are typically used for safety or high and low limit applications.

All options are available in both the probe style more typical of a boiler type installation or as a Bulb and capillary tube for more remote temperature sensing.

The 351 series offers numerous mounting options that allow for simple replacement of competitor’s thermostats. 

The temperature range determines when the thermal switch will close, or engage the electrical circuit, and when it will automatically reset, or open. These switches can also be manually reset for when you need to call special attention to a temperature malfunction.

Product Specifications

  • 0°F to 700°F Temperature Range
  • Fixed, or Adjustable Temperature Range
  • Automatic, or Manual Reset
  • SPDT Switch Action
  • 15-25 Amps @ 120VAC
  • 250°F Maximum Ambient Temperature
  • Panel, Back or Side Mounting Options
  • Housing Optional. See catalog for more information.
  • Front Terminal Locations
  • Screw Driver or D-Shaft Adjustment
  • Copper, Nickel Plated Copper, One Piece Stainless Steel, or Two Piece Stainless Steel Available


Contact Us

Learn more about the 351 Series below, or contact us.

354 Series

The 354 series Bulb & Capillary thermostat is specially designed for applications that require tight tolerances and close calibration at the desired nominal temperature set point. The adjustable shaft of the 354 control is a “through shaft” design that extends through the control providing a smooth rotating operation assuring repeatability of the setpoint through the entire dial rotation. The control lever is positively positioned by tabs that encircle the shaft to eliminate rocking motions inherent in some thermostat designs. The side mounting allow the 354 to be installed in areas with very limited depth.

Combined with tight tolerances you get repeatability through the entire dial rotation. Side mounting is ideal in areas of limited depth.

The SPDT switch action allows for break on temperature rise or temperature fall. The 354 series is available with optional ambient compensation to offset the impact on calibration caused by the thermostat body being installed in high ambient locations.

The 354 thermostat can be used for a wide variety of control functions including: spas, pool heaters, wall heaters, portable and unit heaters, heat pumps, fans, domestic and commercial ranges, food service equipment and others.

This capillary thermostat is ideal in areas of limited depth with it’s side mounting capabilities.

Product Specifications

  • 0°F to 675°F Temperature Range
  • Adjustable or Fixed Temperature
  • Automatic Reset
  • SPDT Switch Action
  • 15-25 Amps @ 120VAC
  • Side Mounting Option
  • Top Terminal Location
  • 150°F Maximum Ambient Temperature
  • D-Shaft Adjustment
  • Copper, Nickel Plated Copper, One Piece Stainless Steel, or Two Piece Stainless Steel Available

Contact Us

Learn more about the 354 Series below, or contact us.

STEMCO Capillary Switch 354-5001
354-2046 Capillary Thermostat
STEMCO Capillary Switch 358e-136
358W-136 Capillary Thermostat
STEMCO Capillary Switch 358ew-136

358 Series

The 358 Series capillary thermostats offers the same versatility as the 351 series with the addition of being a more compact design utilizing rear terminals, permits use in tight spaces where other controls will not.

The DEMCO listing allows the 358 series to be used in products requiring European approvals.

The SPDT switch action allows for break on temperature rise or temperature fall.

The 358 Series is available with optional ambient compensation to offset the impact on calibration caused by the thermostat body being installed in high ambient locations

The 358 series close tolerances and narrow temperature differential make it ideal for commercial cooking equipment, Water Heaters and Dishwashers. The mounting bracket is available with standard centers of 1.75”, 1.312” and 28mm making it an easy replacement thermostat.

Product Specifications

  • Temperature range 0°F to 600°F
  • Adjustable Temperature
  • Automatic Reset
  • SPDT Switch Action
  • 15-25 Amps
  • 250°F Maximum Ambient Temperature
  • Panel or Back Mounting Options
  • Back Terminal Location
  • Screw Driver or D-Shaft Adjustment Options
  • Copper, Nickel Plated Copper, One Piece Stainless Steel, or Two Piece Stainless Steel


Contact Us

Learn more about the 358 Series below, or contact us.