A barometer is a instrument used to measure air pressure
Bimetallic strips are typically found in the turn indicator circuit on vehicles. The opening and closing of the contacts makes the familiar clicking noise that we associate with turning on the blinker. This component is being replaced in the auto industry as more car models are being equipped with LEDs (Light Emitting Diodes). LEDs consume only a fraction of the current that their incandescent counterparts do and as such the current drawn is not sufficient to heat a strip. Both the LEDs and the solid state driver modules that are replacing the bimetallic strips are more durable, more reliable and usually have a life expectancy longer than the car they were installed in.
Commonly a toaster will have a small magnet as part of the time/colour mechanism. A bimetallic strip gradually heats up, and breaks the electrical current. If we use a simple bimetallic mechanism, then the breaking process will be gradual. If we add a small magnet to the system, then it will withstand the opening force of the bimetallic for a little, and then will snap open quickly. If the breaking process were gradual, then there would be some arcing of the contacts - undesirable.
Usually the instrument used is called a barometer- which could be a closed end manometer or an aneroid barometer.An altimeter actually also measures atmospheric pressures - but for a different purpose.
Air pressure is measured with a barometer.
Bimetallic strip
The bimetallic strip bends.
thermostat
fire alarm
A bimetallic strip is typically made of two different metals fused together, such as brass and steel or copper and iron. These metals have different coefficients of thermal expansion, causing the strip to bend when exposed to temperature changes.
When the temperature of the iron increases, the bimetallic strip bends upwards. This breaks the contact between the strip and the heating coil. When the temperature falls, the bimetallic strip bends down and the contact is restored.
A bimetallic strip is made of two different metals bonded together, which have different coefficients of thermal expansion. This causes the strip to bend when heated or cooled. Bimetallic strips are often used in thermostats, temperature switches, and circuit breakers to control temperature-sensitive mechanisms.
Commonly, brass and steel are used in a bimetallic strip. This combination allows the strip to bend or warp when subjected to temperature changes due to the different thermal expansion coefficients of the two metals.
because of pressure
Appliances like electric iron, which need a cut off from the electric current from time to time as the appliance is heated adequately, use bimetallic strip for this.
A bimetallic strip is used to convert a temperature change into mechanical displacement.
yes, in automated iron boxes