High temperature speed sensors use new materials like ceramics and high-tech alloys to withstand the extreme heat of applications like rocket engines. Ceramics replace metals for mechanical components because they are hard, expand minimally and withstand high temperatures. Magnetic sensors eliminate cables by using magnets or silicon strips to gauge speed. Wiring uses high-tech alloys instead of copper and heat-resistant materials instead of plastic for insulation. These innovations allow sensors and other components to function reliably even in very hot environments.

1. The High Temperature Speed Sensor - The Hottest New
Technology - Speed Sensor
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By Peter Roscoe - http://speedsensor.org/
Have you ever stopped to wonder how gages and sensors in rocket engines work? Man, those engines
and everything in them must get hot! So why doesn't the whole system go haywire when all of the finite
mechanisms such as speed sensors that gage the rotation rate of all the different spinning motors get
hot enough to melt common metals.
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High Tech Materials
Well it would be easy to guess that they make everything out of high temperature alloys. Hey! What
about electrical components that contain finite moving parts? Won't everything short out and what
about metal expansion in high temperatures? The fact is, that all of these problems have been solved
with the use of new high tech materials.
Magnetic Sensors

2. First of all, high temperature sensors use magnets or silicon strips impregnated with magnetic material
to actually gage how fast something is spinning, so that eliminates any type of cable that would foul up
in high temperatures. So, this eliminates one problem but what about thew others?
Ceramics Replaces Metal in High Temperatures
Ceramics are now used extensively in high tech, high temperature speed sensors and if fact ceramics are
finding their way into many high temperature mechanical applications. Its hard, expands minimally, can
be shaped and milled and doesn't conduct electricity and withstands extremely high temperatures, so
ceramics works great in high temperatures.
High Tech Alloys Resist High Temperatures
For wiring, copper which melts at around 2,000 degrees is replaced by new high tech alloys that stand
up to much higher temperatures. Instead of plastic coating, like regular wire, other high tech heat
resistant materials such as asbestos are used to insulate the wiring in today's high temperature speed
sensor.
So… What’s Next ?
To learn more about Speed Sensor, Click Here: http://speedsensor.org/