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Pressure Sensors
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   Sensor Carrier Demodulators

CD23/223 Carrier Demodulator with LED Display
• 3 ½ or 4 ½ Digit display
• Dual transducer inputs on CD223
• BCD output option
• Analog DC output
• Operates with variable reluctance or LVDT transducers
Data Sheet Instruction Mannual Request



Technical Details

The CD23 and CD223 Digital Transducer Indicators are designed for use with variable reluctance and differential transformer transducers. The CD23 accepts input from a single transducer, and the CD223 accepts two switch-selectable inputs, with Zero and Span controls for each input.

The indicators provide 5 Vrms, 5 kHz carrier excitation voltage to the transducer(s) and solid state circuitry to amplify, demodulate and filter the transducer output signals. A 3 1/2 digit front panel display is standard, with a 4 1/2 digit display optionally available.

In addition, a high level dc analog output voltage is provided, based on 1.0 Vdc output per 100 digit display counts, or 10 Vdc full-scale and 1000 counts on the display. To provide maximum flexibility, the standard display is set to read in percent of full-scale (±100.0% for normal full-scale indication), permitting use with transducers of different pressure ranges and units while retaining the resolution of the full 10 Vdc analog output and 1000 digit counts.

A High-low range switch is provided to increase meter sensitivity by 10x over 0 to ±19.99 percent of full-scale range (analog output is unaffected by the Range switch.)


  • 3 1/2 or 4 1/2 Digit Display
  • Dual Transducer Inputs on CD223
  • Analog DC output
  • Operates with variable reluctance or LVDT transducers

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