Throughout our website we use the verbiage limit and control, or fan. It is not always clear to users what temperature switch to use for certain applications. Even though fan and limit switches are put together in our documentation,…
Capillary Thermostat Controls and Protects High Temperature Ovens
For the purpose of our discussion we will use the word oven to denote any heated chamber used for cooking, curing, processing paint or adhesives, laboratory control and forming. In any oven, especially commercial ovens, there are two capillary thermostat…
Fluid or Gas Filled Capillary Tubes
Not all Bulbs, Probes and Capillary Tubes use a fluid fill, some use a gas. There are a large number of different fluids and gases used. This is based on: What material is being sensed for temperature Temperature range of the…
STEMCO Capillary Switches are Temperature Compensated
STEMCO, a division of Senasys, Capillary Switches stand out from other capillary switch manufacturer’s because they are temperature compensated. A capillary switch should be temperature compensated to adjust the switch’s performance when changes in temperature occur. For instance, a capillary…
Senasys Capillary Diaphragms 100% Tested and Inspected
Our different test procedures include pressure and stress the capillary diaphragms over a period of time, and multiple temperature tests. These numerous procedures will tell us if a leak in the capillary diaphragm assembly exists. Once the testing is complete,…
Capillary Thermostats Highly Reliable Temperature Switching
Senasys capillary thermostats at 100% tested and sold across the globe to original equipment manufacturers. Before leaving our facility, these switches undergo submersion testing to verify the temperature which the switch operates. Our quality assurance team submerses 100% of the…
Temperature Switches for HVAC Systems
Senasys manufacturers a large variety of temperature switches for HVAC systems: Bi-metal temperature switches Bulb and capillary thermostats Mechanical line voltage thermostats Temperature switches found in HVAC systems are typically mechanical controls that are based on physics. More times than…
Capillary Switch Cross Reference Guide
As an easy guide, here’s a simple selection guide to help find a capillary 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…
Function of a Capillary Thermostat
Bulb and Capillary style thermostats use expanding liquid to open or close contacts in response to temperature changes. No matter which style or model you choose, all of the capillary thermostats operate using the same physics. A fluid is encapsulated…
Importance of a Switch’s Rise/Fall and Hysteresis
Whether using temperature, pressure, or current, the designation of ON RISE or ON FALL is very important. This is due to hysteresis. HYSTERESIS: DIFFERENCE BETWEEN TWO POINTS When a thermostat switch changes states, from Open to Closed for example, the point at…