SC-2440

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Self contained analog output displacement sensors

  • Self-contained electronics
  • Built-in temperature sensor
  • Fixed gain output
  • Reverse polarity and short circuit protection
  • No calibration required
  • Low cost
  • Excellent performance with ferrous targets
  • Variable voltage input from 15 to 30 volts DC
  • Compact and rugged, IP-67
  • Extremely low hysteresis
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Performance
RangeSteel target - 4.0 mm (0.16 in.) with 1.0 mm offset
Aluminum target - 2.5 mm (0.10 in.) with no offset
Resolution 0.001 mm (0.00004 in.) at full range
Output0 to 10 Vdc*
Thermal Stability0.02% FS w/ext TC
Repeatability0.01% FS
Response Time0.10 ms
General
EnvironmentalIP-67
Integral cable jacketPVC
Body Nickel-plated steel
Maximum jam nut torque14 in-lbs (1.6 N-m)
Temperature
Operating range0° to 70°C (32° to 158°F)
Storage range0° to 70°C (32° to 158°F)
Compensation range 15° to 55°C (59° to 131°F)
Temperature Output
Temperature output voltage0.50 to 1.20 VDC, 0 to 70° C
Sensitivity10mV/°C
Convert V temperature out to °CSensor °C = (Vtemp – 0.50) x 100
Analog Output
Continuous load current<50 mA
Short circuit and overload protectionYes
Warm-up time <1 minute
Input
Supply voltage required15 to 30 Vdc
Current limit (no load current input)<50 mA
Reverse polarity protectionYes
Short circuit protectionYes

*Application dependent

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 apps engineer to discuss your particular requirements.

In-line cable connector splice
Many sensors come with integral sensor cables. Routing this cable in some applications is difficult and something you only want to do once. Including an in-line connector splice in the cable, near the sensor itself, allows for easy sensor replacement should the need arise.

Hermetic in-line connector splice
Some applications pass the sensor through a pressure boundary, most commonly a vacuum chamber wall. We offer an in-line hermetic bulkhead splice for these applications.

SPECIAL CALIBRATIONS

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

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
When the standard thermal sensitivity of 0.1%FS/°F is not enough, a temperature compensated calibration can be performed that will improve the thermal sensitivity to 0.02%FS/°F. This is accomplished over a customer specified 100°F range with the upper limit of that range <150°F. Larger ranges and higher temperatures are also possible on a best effort basis.

Output
Besides the standard 0-10VDC output, the SC-2440 offers a 4-20mA output and a differential 0-10VDC output.

Synchronization
When multiple channels are used in such a way that the sensors themselves are in close proximity to each other (within 3 sensor diameters), synchronizing the oscillators of the electronics modules will eliminate the resulting beat note interference that will be seen as noise on the outputs.

Log Amp Bypass
When extremely short range calibrations are required/desired, bypassing the log amplifier reduces noise improving performance.