stemco
Capillary Thermostats and Thermowells
STEMCO, a division of Senasys, designs and manufactures thermostat switches trusted by original equipment manufacturers (OEMs) worldwide. Regardless of the style or model, all capillary thermostat switches operate on the same principle: a fluid encapsulated in metal expands or contracts with temperature changes. This fluid movement activates a diaphragm connected to a snap-action switch, which either opens or closes the circuit to regulate temperature.
With STEMCO, you have a wide variety of capillary thermostats & thermowells to choose from, tailored to meet your specific temperature control needs.
What are Thermowells?
Thermowells are tubular fittings designed to protect temperature sensors in industrial processes. A thermowell consists of a tube closed at one end and mounted in the process stream. STEMCO offers several varieties that house both RTDs and our Temperature Sensing Capillary Probes, ensuring accurate and reliable temperature measurement in demanding environments.
quality ambient compensation
Our capillary thermostats feature ambient compensation to offset temperature differentials, ensuring greater accuracy as environmental conditions change. This technology helps maintain reliable temperature control, even in fluctuating surroundings, making our thermostat controls ideal for dynamic applications.
certified
Senasys ensures the quality control & reliable operation of all our products. Every capillary thermostat is 100% tested individually before leaving our facility to guarantee consistent performance. Our capillary thermostats are UL & cUL approved, meeting industry standards for safety & reliability.
custom options
Senasys capillary thermostat switches are available as custom-built temperature control solutions , tailored to meet your exact specifications. This ensures you receive the precise capillary thermostat switch you need, without paying for unnecessary features, optimizing both performance & cost.
MADE IN THE U.s.a.
All Senasys products are designed, manufactured, tested, & shipped from our facilities in Eau Claire, WI to clients worldwide. Every switch is individually 100% tested for quality & performance before leaving our plant, ensuring reliable operation for every customer.
Contact our technical sales team today.
Single Stage Bulb & Capillary Thermostats
Senasys offers a variety of single pole, double throw (SPDT) capillary thermostats, available in both field adjustable & fixed models. These thermostats can be equipped with either manual or automatic reset options, providing flexible solutions for diverse applications.
Two Stage Bulb & Capillary Thermostats
Senasys also offers an option for a second switch (DPDT) , providing flexibility in control. The two switches can be configured in any combination of SPDT auto reset & SPST manual reset, allowing for customized temperature control solutions.
HYDRASTAT Capillary Tube Temperature Sensors
The Capillary Tube Temperature Sensors consist of a bulb, capillary tube, and a diaphragm. The diaphragm is engineered to move at a specific rate in response to temperature changes, providing precise temperature sensing and control.
Electronic Temperature Switch
The electronic temperature switch offers a cost-effective, flexible solution that provides tight differentials & tolerances. This digital switch can be used as a standalone board mounted to the control panel or as a complete enclosure, offering versatility for various applications.
Thermowells & Support Tubes
Thermowells are tubular fittings designed to protect temperature sensors in industrial processes. A thermowell consists of a tube closed at one end, mounted directly in the process stream. We offer several varieties that house both RTDs & our Temperature Sensing Capillary Probes, ensuring reliable temperature measurement and protection in demanding environments.