Polygraph (NU-239C)

• A unique system of pen motors, Modular easily interchangeable in a minute or two.
• Pen length standard 120mm for ink writing system improving upon the international standard (100mm) as per Grass or BECKMAN
• A shorter pen length would mean greater arc distortions which are synonymous with waveform distortion and arc distortion. Pen length below 100min is not internationally accepted,
• Frequency Response: with 120min ink pen length 70Hz-3db. With shorter ink pens 75 or 80min length this response will be appreciably higher.
• Chart Drive - With completely silent gear train fitted with the finest imported synchronous motor free from any backlash. Noisy or large humming gear train or motor can introduce Bio-feedback signals.
• Z fold chart paper for easy back reference and recording,
• Ripple free power supply with high stabilization and overload protection.
• Modular Time & Event channel (optional).