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 Control
Products, Inc. was founded in 1946 with 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 expanded into many different industries,
providing a diverse portfolio of expertise.
Today,
CPI thermal switches offer dependable protection for your products
with a calibration range of 0-1850°F degrees, and a momentary overshoot
up to 2,000°F. Configurations using snap-action bimetallic disk,
bimetal slow make - break, rod and tube, and solid state construction
offer a broad array of temperature control solutions.
Thermal
switches continue to be the most efficient and reliable means of
controlling temperatures as well as warning of over-temperature.
Where critical component temperature ranges are involved, thermal
switches represent the final safety cutoff for protection of these
components. It is imperative, therefore, that engineers be aware
of the factors involved in the correct selection of thermal switches.
CPI
thermal switches have been qualified to portions of MIL STD 810
as well as sections 4,6,7,8,12,13, and 14 of the RTCA DO-160C. Click
here to view more detail on our thermal
switch qualifications.
CPI’s
3 Thermal Switch Product Types
Each
main switch type uses a different mechanism for sensing temperature,
which provides variations in operating temperature range as well
as performance.
SnapStat:
Contact movement is achieved using a bimetallic snap disc. Snap
action provides shock and vibration immunity, and broader differential.
Set point range: 0-350°F
Bimetal:
Contact movement is achieved via the different expansion rates
of two metals fused together. This is a slow-make-and-break device,
which provides very close tolerance temperature sensing, with
small differential.
Set point range: 0-650°F
Rod
& Tube: Again, contact movement 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 rapid response time.
Set point range: 0-1850°F
APPLYING
THERMAL SWITCHES WITH SUCCESS
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