Thermostats are an integral part of our daily lives, regulating temperature in everything from our homes to our appliances. Among the various types of thermostats available, the “normally open” thermostat is a common and essential component. In this article, we will delve into the world of normally open thermostats, exploring their functions, applications, and advantages.
What is a Normally Open Thermostat? A normally open thermostat, often abbreviated as NO thermostat, is a temperature-sensitive device designed to control the flow of electricity or another signal based on temperature changes. Unlike normally closed thermostats, which complete a circuit when the temperature falls below a set point, normally open thermostats do the opposite. They break the circuit when the temperature rises above the set point. How Does it Work? The fundamental principle behind a normally open thermostat is the use of a bimetallic strip. This strip is made of two different metals bonded together, each with a different coefficient of thermal expansion. When the temperature changes, one metal expands or contracts more than the other, causing the strip to bend.
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