Single Stage Capillary Thermostats

The 351 series Capillary Thermostat is our most versatile line of remote sensing thermostats, available in both Bulb & Capillary Tube or Probe styles. These thermostats offer various configurations, including fixed or adjustable temperatures, auto or manual resets, and options for Copper/Plated Copper or Stainless Steel construction. All variations come with multiple mounting options, ensuring compatibility with a wide range of applications.

Fixed temperature models are commonly used for safety or high/low limit applications, providing reliable protection in critical systems.

The 351 series is available in both probe style, ideal for boiler-type installations, and bulb & capillary tube style, perfect for more remote temperature sensing applications.

With numerous mounting options, the 351 series allows for easy replacement of competitor thermostats, making installation and upgrades hassle-free.

The temperature range determines when the thermal switch will close (engage the electrical circuit) and when it will automatically reset or open. These switches can also be manually reset to address specific temperature malfunctions when necessary.

The 354 series Bulb & Capillary thermostat is specially designed for applications that require tight tolerances & precise calibration at the desired nominal temperature setpoint. The adjustable shaft of the 354 control features a “through shaft” design, extending through the control for smooth rotation, ensuring repeatability of the setpoint across the entire dial rotation. The control lever is securely positioned by tabs that encircle the shaft, eliminating rocking motions often seen in some thermostat designs. The side mounting option makes the 354 thermostat ideal for installations in areas with limited depth.

With tight tolerances, the 354 thermostat guarantees repeatability throughout the full dial rotation. Side mounting is perfect for applications where space is constrained.

The SPDT switch action provides flexibility, allowing for break on temperature rise or temperature fall. The 354 series also offers optional ambient compensation to adjust for temperature changes caused by the thermostat being installed in high ambient locations, ensuring reliable calibration.

The 354 thermostat is versatile and can be used in a wide range of applications, including spas, pool heaters, wall heaters, portable heaters, unit heaters, heat pumps, fans, domestic & commercial ranges, food service equipment, & more.

With its side mounting capabilities, the 354 series capillary thermostat excels in applications with limited depth, providing flexible installation options in tight spaces.

The 358 Series capillary thermostats offer the same versatility as the 351 series, with the added benefit of a more compact design featuring rear terminals. This design makes the 358 series ideal for use in tight spaces where other controls may not fit, ensuring flexibility and reliable temperature control.

With SPDT switch action, the 358 series provides flexibility to break on temperature rise or temperature fall, ensuring precise temperature regulation in various environments.

An optional ambient compensation feature is available, helping to offset the impact on calibration when the thermostat is installed in high ambient locations, ensuring accurate temperature control under varying conditions.

The 358 series‘ close tolerances & narrow temperature differential make it ideal for use in commercial cooking equipment, water heaters, & dishwashers. The mounting bracket comes with standard hole centers of 1.75”, 1.312”, or 1.102”/28mm, making it an easy replacement for existing thermostats.