Commercial dishwasher capillary thermostatCapillary thermostats are commonly found in various types of commercial dishwashing machines. These thermostats consist of a temperature sensor and a tube filled with a heat-sensitive liquid. The liquid expands or contracts with temperature changes, triggering the thermostat to open or close a switch and regulate the appliance’s heating element or cooling system. To request OEM pricing, please contact us.

Technical Details of Capillary Thermostats

Capillary thermostats manage temperature with several key components:

Temperature Sensor: This sensor, usually a bulb or probe, sits within the medium (e.g., water in a dishwashing machine) and contains a liquid or gas sensitive to temperature changes.

Capillary Tube: This tube connects the sensor to the switching mechanism. Filled with the same heat-sensitive liquid or gas, it ensures accurate transmission of temperature changes.

Bourdon Tube or Bellows: Located at the end of the capillary tube, this component converts pressure changes into mechanical motion.

Switch Mechanism: This mechanical motion actuates a switch, typically an electrical contact, which then controls the heating element or cooling system.

How Capillary Thermostats Work in  Commercial Dishwashing Machines

Capillary thermostats maintain optimal water temperature in commercial dishwashing stations, crucial for effective cleaning and sanitation:

Installation: Place the temperature sensor near the heating element, often in direct contact with the water. The capillary tube runs from the sensor to the control unit.

Operation: As water temperature rises, the liquid in the sensor expands, increasing pressure within the capillary tube. This pressure moves the Bourdon tube or bellows, activating the switch mechanism. If the water temperature exceeds the set point, the switch cuts off power to the heating element. If the temperature falls below the desired level, the switch closes the circuit, allowing the heating element to operate.

Feedback Loop: The system continuously adjusts the heating element’s activity to maintain the desired water temperature.

Stemco 351-254256 Capillary ThermostatBenefits of Using Capillary Thermostats

Capillary thermostats offer several advantages in commercial dishwashing stations:

High Accuracy and Reliability: These thermostats respond directly to temperature changes, maintaining a consistent temperature even as the load of dishes and incoming water temperature vary.

Ease of Installation and Maintenance: Capillary thermostats connect easily to existing plumbing and electrical systems. Their design minimizes the need for complex electronic components, making them robust and durable. Regular maintenance involves checking the sensor and connections for continued accurate performance.

Temperature Stability: Capillary thermostats provide a stable temperature environment, ensuring detergents and rinse agents work effectively, leading to better cleaning results and improved hygiene.

Why Capillary Thermostats Are a Popular Choice

Capillary thermostats remain a popular and effective choice for controlling temperature in commercial dishwashing machines. Their reliability, accuracy, and ease of installation make them essential in any well-functioning commercial kitchen. Their mechanical nature makes them less susceptible to electrical interference and other issues affecting electronic 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.