Extreme Environment

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For high pressure, low temperature, and high temperature applications

  • For applications requiring high accuracy, high reliability, and structural integrity.
  • Operating temperatures from -320°F to +1,000°F (+1,200°F short term).
  • Displacement systems withstand pressures up to 3500 or 5000 psi.
  • Dual-coil sensor design effectively minimizes radiation effects.
  • Hermetically sealed and laser welded.
  • Unaffected by environmental contaminants.
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SensorIGS formatSTEP format
KD-1925 flanged sensor
IGSSTEP
KD-1925 threaded sensor
IGSSTEP
KD-1950 flanged sensor
IGSSTEP
KD-1975 flanged sensor
IGSSTEP
Operating temperature range -320°F to 1000°F (+1200°F short term)
Operating pressure range Up to 5000 psi
Power input (120 Vac)
Output (electrical zero offset up to 50% of measuring range)From 0 to 2 Vdc nominal (50 mV/mil)
Resolution (at mid range)
Static30 to 100 µinch (0.00003 to 0.0001 inch)
[0.00076 to 0.0025 mm]
Repeatability30 to 100 µinch at mid range
NonlinearityWithin ±1% FSO at customer selected calibration temp.
Typical temperature coefficients
(over maximum specified thermal range)
Zero shift
0.02 to 0.03%/°F FSO (0.054%/°C FSO)
Sensitivity shift 0.02 to 0.03%/°F FSO (0.054%/°C FSO)
Frequency response 0-10 kHz (3 dB) - Higher available on request
Sensor material Corrosion resistant high temperature nickel chrome alloy (Inconel 718) welded and hermetically sealed
Cable material Nickel chrome alloy (Inconel 600) sheathed, mineral insulated
Standard cable lengths
Hardline 10 feet
Softline5 feet
Target material Conductors – nonmagnetic magnetic

SPECIFICATIONS FOR A NONFERROUS TARGET

SENSOR
click to view
RANGE
inch/mm
OFFSET MAX
inch/mm
STATIC
RESOLUTION
inch/mm
DYNAMIC
RESOLUTION
inch/mm
KD-19250.050/1.27
0.001/0.0253x10-5/7.6x10-45x10-5/1.3x10-3
KD-19500.150/3.81
0.005/0.127
5x10-5/1.3x10-3
1x10-4/2.5x10-3
KD-19750.200/5.00
0.010/0.254
1x10-4/2.5x10-3
1x10-4/2.5x10-3

SPECIFICATIONS FOR A FERROUS TARGET

SENSOR
click to view
RANGE
inch/mm
OFFSET MAX
inch/mm
STATIC
RESOLUTION
inch/mm
DYNAMIC
RESOLUTION
inch/mm
KD-1925M0.035/0.90
0.001/0.025
3x10-5/7.6x10-4
5x10-5/1.3x10-3
KD-1950M0.100/2.54
0.005/0.127
5x10-5/1.3x10-3
1x10-4/2.5x10-3
KD-1975M0.100/2.54
0.010/0.254
1x10-4/2.5x10-3
1x10-4/2.5x10-3

Many options are available to customize a standard system to meet the
exact needs of the application. The most popular are:

SENSOR CABLES

Sensor cable extension
Most sensors can handle longer cable lengths, although increasing the
cable length can and will affect some performance specifications.
Shorter than standard cable lengths are also available. Call an applications engineer to discuss your particular requirements.

Weld sleeve
When passing the cable through a pressure barrier, a weld sleeve can be
added at a location specified by the customer. The weld sleeve allows
for welding the cable in place without welding directly to the hardline
cable sheath. This sleeve can also be used with compression fittings to
prevent crushing the thinner hardline cable sheath.

SPECIAL CALIBRATIONS

Range
Standard published ranges are based on meeting a set of performance
specifications. Custom calibrations are possible to meet specific
application needs. Contact a Kaman applications engineer if you desire a
custom calibration.

Target material
Unless otherwise specified, nonferrous systems will be calibrated with
an aluminum target; ferrous systems will be calibrated with a 4130 steel
target. If your target material is significantly different in conductivity and/or permeability, it may be best to calibrate using the same material as your target.

Temperature compensation
Extreme Environment sensors are temperature compensated as standard.
They are provided with output data at ambient and two additional
temperatures specified by the customer. Linearity optimization is done
at one of these three temperatures, as specified by the customer.

Output
Output voltage range can be different from the published specifications.
Contact a Kaman applications engineer if you desire a custom output.

ENCLOSURES

Rack/bench mounting
The electronics comes in a Eurocard format. Enclosure options include a
full 19-inch rack, a 3/4 benchtop rack, and a 1/2 benchtop rack.

NEMA
In harsh locations, up to two channels can be housed in a NEMA enclosure.