Thermocoax

TURBOCOAX® Capacitance Sensors
Turbocoax
bullet Non-contact blade tip clearance measurement
bullet No cooling system required
bullet Small dimensions
bullet Withstand temperatures up to 1,300°C (2,400°F)

Capacitive sensors were developed to measure the clearance between the tip of the blades and the casing of turboengines.

The turboengine yield is directly related to this clearance, which must be minimum, but the blading must not, in any circumstances, touch the casing.

Main applications for capacitive sensors are found in aircraft engines, but the same measurement problem exists in industrial gas turbines.

Thanks to their small dimensions and "no cooling", TURBOCOAX® capacitance sensors do not disturb the casing temperature distribution, shape or clearance.
 
bullet Compressor control bullet Capacitance 200 to 400 pF
bullet Turbine control bullet Mineral Insulated cable with specified sheath material or insulant
bullet Development measurements bullet Cable diameter 2 mm or less, length up to 5 m
bullet Engine monitoring bullet Clearance range from 0 to 3 mm
bullet Vibration tested up to 3,000 g's at 10 kHz bullet Temperatures up to 1,300°C (2,400°F)
bullet Various body designs and types to suit standard and specific applications

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