Universal Kymograph Assembly

Universal Kymograph Assembly

Includes the Universal Kymograph with Stimulator, comprehensive set of accessories, and 165-page Applications Manual with detailed instructions for over 30 experiments.

Item# Description U.S. List Price Quantity
50-7392 Universal Kymograph Assembly, 230 VAC, 50 Hz
50-7384 Universal Kymograph Assembly, 115 VAC, 60 Hz
50-5560 Kymograph Cylinder, Plastic, 500 x 200 mm (19.7 x 7.9 in)
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This Assembly includes the Universal Kymograph with Stimulator plus a comprehensive set of accessories with a 165- page Applications Manual with detailed instructions for over 30 experiments. For locust work, a special cork mounting block is supplied, which wedges vertically in the muscle chamber.

Some of the possible experiments include:

Frog Heart In Situ Preparation:

  • Recording of cardiac activity
  • Effect of stimulation of the heart (refractory period compensatory pause)
  • Demonstration of conduction path (stimulus ligatures)
  • Effects of stimulating the vagus nerve (cardiac inhibition)
  • Effect of drugs

Muscle-Nerve Preparation:

  • Effect of stimulating voltage (simple muscle twitch)
  • Effect of stimulation frequency (tetanus)
  • Staircase phenomenon (Treppe)
  • Effect of repeated stimulation (fatigue)
  • Effects of drugs on muscles
  • Effect of pre- and after-loading on muscle efficiency

The Kymograph Cylinder is for use with the 19 mm (3/4 in) diameter spindles of the Harvard Apparatus Universal Kymographs. Each Cylinder has 2 mounting plates for fitting it concentrically onto the Kymograph spindle. A lockable split ring fixes the Cylinder to the spindle at the desired height. This cylinder is plastic and is for ink writing only.

Specifications50-739250-738450-5560
Circumference (English)Two fully variable ‘opto-triggering’ producing a short circuit across ‘contract’ socketsTwo fully variable ‘opto-triggering’ producing a short circuit across ‘contract’ sockets19.7 in
Circumference (Metric)Not includedNot included500 mm
Height (English)18.1 x 9 x 8.7 in18.1 x 9 x 8.7 in7.9 in
Height (Metric)460 x 230 x 220 mm460 x 230 x 220 mm200 mm
Material0.1 to 100 Hz continuously variable in 3 ranges, 0.1 to 1.0 Hz, 1 to 10 Hz and 10 to 100 Hz0.1 to 100 Hz continuously variable in 3 ranges, 0.1 to 1.0 Hz, 1 to 10 Hz and 10 to 100 HzPlastic
< 25 ? at max. output current of 250 mA< 25 ? at max. output current of 250 mA
Continuous, single and trigger via contact arms on spindleContinuous, single and trigger via contact arms on spindle
0 to 25 V, continuously variable in 3 ranges, 0 to 250 mV, 0 to 2.5 V and 0 to 25 V0 to 25 V, continuously variable in 3 ranges, 0 to 250 mV, 0 to 2.5 V and 0 to 25 V
6 preset widths of 0.05, 0.1, 0.5, 1 2 and 5 ms6 preset widths of 0.05, 0.1, 0.5, 1 2 and 5 ms
2 x 4 mm sockets2 x 4 mm sockets
Infinitely variable from 0.006 to 625 mm/sec with 500 mm circumference cylinder; 0.012 to 1250 mm/sec with 1000 mm circumference cylinder, cylinder not suppliedInfinitely variable from 0.006 to 625 mm/sec with 500 mm circumference cylinder; 0.012 to 1250 mm/sec with 1000 mm circumference cylinder, cylinder not supplied
Either continuous or single revolution using manual start/stop controlEither continuous or single revolution using manual start/stop control
16.5 lbs16.5 lbs
7.5 kg7.5 kg
Smoke or ink, dependent on recording cylinder chosenSmoke or ink, dependent on recording cylinder chosen