CPI CPI’s 3 Thermal Switch Product Types
• SnapStats • PlugStats • Rod & Tubes
SnapStat Bimetallic Disc Thermal Switches
AD Product Series
Set Point Range: 0°F - 350°F (-17.8°C - 177°C)
Contact movement is achieved using a bimetallic snap disk. Snap-action is a benefit to this product line, and broader differential is the important thermal characteristic.
CPI's SnapStat thermal switches have a bimetal snap disc that actuates a miniature microswitch (see cross-section). This double snap action makes these switches virtually immune to shock and vibration. Epoxy sealing or glass to metal hermetic sealing makes them ideal for demanding industrial or military applications.
The SnapStat's SPDT action provides both control and indication at the same time-two functions from on switch. Or it can be used as a SPST thermal switch. Calibration temperature range is 0°F to 350°F with a tolerance of +/- 7°F. (Dual temperature SnapStats incorporate two separate temperature controls in one mounting). The basic SnapStat switch mechanism is available under part number AD060 and is suitable for gluing or clamping in place. Custom brackets are also available.
PlugStat Bimetallic Thermal Switches
L, M, R, and S Product Series
Set Point Range: 0°F - 650°F (-17.8°C - 343°C) - depending on model
Bimetal switches are based on a two-layer alloy leaf, which deflects with changes in temperature. The heat producing the thermal action works through the bimetal leaf mounting in the top of the probe, and enables CPI to design relatively short probe switches with a high degree of accuracy. They can be used as temperature controllers, safety cutoffs for equipment protection, and indicators of overheat conditions. These thermal switches are capable of tight set point tolerances and small differential (0-5°F).
Rod & Tube Thermal Switches
AB, W, and X Product Series
Set Point Range: 0°F - 1850°F (-17°C - 1010°C) - depending on model
CPI Rod and Tube switches are factory calibrated at any temperature within the range of 0 to 1850°F. They can operate in probe ambient temperatures from -65 to 2000°F, and show excellent resistance to momentary overshoots. Immune to problem environments: Sealed for protection against the effects of moisture, sand and dirt, these Rod and Tube thermal switches are also designed to withstand severe shock and vibration with no shift in calibration.
