About the KD-1925 Extreme Environment Sensors
Kaman’s high-temperature displacement sensors provide accurate non-contacting measurement of conductive surface motion in hostile environments. Thermal compensation techniques that maintain sensitivity and linearity with small zero shifts make these accurate high temperature measurements possible.
Kaman’s sensors feature laser-welded Inconel construction, making them perfect for a variety of extreme environment applications. The sensors use the versatile KDM-8200 family of signal conditioning electronics. Single channel systems are available in the NEMA-enclosed KDM-8200 or bench-top/ rack-mountable KDM-8200. The NEMA enclosure houses an internal power supply, digital panel meter and window kit. Up to eight measuring channels are available in the rack-mountable KDM-8200. (See Kaman’s KDM- 8200 data sheet for a complete description and additional specifications for these electronics.)
Each sensor has dual coils inside the corrosion-resistant case. In operation, an electromagnetic field generated by the active coil penetrates the front of the sensor to induce eddy currents in a conductive target within the sensor’s range. Changes in target displacement result in impedance variation in the active coil. This variation is detected by the signal conditioning electronics and converted to a linear analog output signal.
The symmetrical design of the dual coils compensates for constant and slowly changing temperatures from -320°F to +77°F or from 77°F to +1000°F. Measurement quality is unaffected by most corrosive gasses and liquids and most other environmental contaminants such as oil, dirt, radiation, and stray RF and magnetic fields.
The cabling has two sections joined by a LEMO ® transition connector: a high-temperature metal-sheathed, mineral-insulated section designed to the same environmental specifications as the sensor, and a flexible section of Teflon ® jacketed, twisted pair, coax cable for connection to the electronics unit.
Other features KD-1925
- KDM-8200 electronics for the KD-1925, KD-1950 and KD-1975
- Nuclear reactors
- Steam and gas turbines
- Turbine and rocket engines
- Chemical processes
- Research projects
- High temperature processing