Industrial Applications of a CPI Thermal Cutoff Switch

CPI Thermal Cutoff Switches provide some of the most dependable and reliable temperature control in the industry, and it is used in applications where an uncompromising approach to thermal switch design is needed.  Our product family has a calibration range of 0 to 1850 degrees F and a momentary overshoot up to 2000 degrees F. They feature rapid response time in rod & tube, bimetallic, snap action or solid state configurations.

Additionally these parts are environmentally sealed to ensure long operating life under the most severe operating conditions and designed to withstand shock and vibration.

Uses of CPI Thermal Switches

As thermal switches represent a straight-forward approach to shutting down a system if a critical temperature is reached, they are specified as thermal cut-off switches. It is its simplicity that makes an electromechanical switch so desirable to designers. And also, they’re passive devices which require no power, and will reliably change state at the specified set point.

CPI Thermal Switches find uses in:

1.    Aircraft Engines Fire Detection.

2.    Detects plastics extruder barrel over temp in plastics manufacturing.

3.    Brake over temp detection in industrial vehicles and airplanes.

4.    Engine cooling fan control.

5.    Clutch over temp in escalators.

6.    Detects bleed air over temp on aircraft environmental control systems.

7.    Window defrosts temperature detection on advanced military vehicles.

8.    Detects over temperature for processing equipment in oil refinery process.

9.    Aircraft Avionics over temp detection.

10.    Gas shut-off flame detection on railroad switch de-icing application.

We’ve collected a vast knowledge of designing and deploying custom thermal cutoff switches over the last 60 years. Founded in 1946, Control Products, Inc. offers a line of thermal switches for aerospace and industrial applications. Developing expertise in precise calibration of these devices over a broad temperature range, the company’s business has expanded into many different industries, providing a diverse portfolio of experience.

Thermal Cutoff Switch Product Line

Currently CPI maintains three primary switch types in its product line:

SnapStats (0°F – 300°F): Bimetallic snap disc is used to achieve contact movement in the temp switch. Snap action provides vibration immunity, shock and a broader differential. Set point range: 0°F-300°F (-17.8°C-148°C)

PlugStats (0°F – 650°F): Fusing two metals with different expansion rates together, contact movement is achieved here. This is a slow-make-and-break device, which provides very close tolerance temperature sensing, with a small differential. Set point range: 0°F-650F (-17.8°C-343°C)

Rod & Tubes: (0°F – 1750°F): Contact movement in the switches is achieved via differences in coefficients of expansion of two materials, in this case the outer tube and the internal rod. This product offers very high temperature sensing and very rapid response time. Set point range: 0°F-1750°F (-18.3°C-954°C).

For more information about CPI visit http://www.cpi-nj.com