Perimeter

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  Student Kymograph 2

  The AWS Student Kymograph is very reliable instrument for use in the study of physiology, pharmacology and Biological Science. There are two instrument model available and each is provided with a series of advance features. The instrument are available with or without stimulator. There is a range of accessories two suit most applications. Illustrated with the kymograph below is one suggested kit or assembly of the more popular accessories.

  Download:Student Kymograph (2)

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  Ergometer

  This AWS figure ergo-meter is ideal for the study of human muscle fatigue. It can be used to record frequency, duration, speed of pull and relaxation curves. A pistol grip carries a trigger that operates against and adjustable spring tensioning device. The pivot point of the trigger holds and adjustable rod, to which a nylon line is secured. This line is wrapped around and adjustable pulley and anchored to a small spring at the top of an upright. A holder on pulley carries an ink writing stylus, which receives ink from a small reservoir. The height of the holder is adjustable. The aluminum base is 125mm (5 inch) wide and 500mm (20 inch) long which is sufficient to support the entire forearm when the hand is holding the pistol grip. A holder on pulley carries an ink writing stylus, which receives ink from a small reservoir. The height of the holder is adjustable. The aluminum base is 125mm (5 inch) wide and 500mm (20 inch) long which is sufficient to support the entire forearm when the hand is holding the pistol grip. Two uprights, which are adjustable for width, are mounted on the base to support and study the wrist. The instrument may be rapidly adopted for the use with a transducer.

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  Audiometer

  Labline LBL-D22 audiometer is a pure sound audiometer developed by using digital audiometry and
  hearing aid testing and matching technology according to the acoustic principle. It is used for hearing
  aid testing and matching for hearing assessment and physical examination centers, hospitals and other
  institutions to detect the hearing threshold.

  Download:Audio Meter LBL-D22

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  Student Spirometer 2

  The Spirometer housing is made of heavy transparent plastic 6mm / 6.5mm thick. It measure 300 x 375 x 375mm overall ( 12 x 15 x 15 inch )

  The 9 liter gas holder is made of light transparent plastic, and carries two needle points rest in metal dimples and serve as the pivot points for the gas holder.

  The counterweight is free to move for adjustment on a Counter poise arm and, when adjusted, is locked in Place.

  On the side corner of the gas holder there is a scale 130mm long (5 1/4 in). Graduated from 0 to 9 liters in 0.1liter increments. This scale is read by a metal point that can be adjusted for zero. This corner of the gas holder also carries a mounting for a writing pointer that can be used with a Kymograph or Chart Recorder.

  The water chamber for sealing the gas holder has been reduced to the minimum capacity that allows easy clearance for the gas holder for the gas holder, and has a drain in its base with tubing and a plug.

  The 30mm bore tubing for the airways, which is made of low density polythene, is light and strong. This tubing has extremely low- profile annular rings, which offers the minimum distortion on bending and therefore preserves the maximum cross-section area.

  The mouthpiece is made of moulded soft rubber. It fits behind the lips, and has two soft rubber bites to locate the teeth and make it more comfortable for breathing through the mouth. The noseclip is also constructed of soft moulded rubber.

  This instrument is supplied with a one-way valve that fits onto the mouthpiece. This valve ensures that the gas stream flows only in one direction. On inspiration, one valve opens and the other one closes, and vice versa on expiration. The valves are a new design and consist of thin mica discs mounted in cast plastic frame.

  The mica disc is held at its center by a nickel plated brass threaded shank that has a soft stainless steel spring mounted on it. The mica disc moves against this soft spring and opens with the slightest positive pressure. It locks with slightest negative pressure.

  The mouthpiece and tubing assembling fits to a tubing valve that is mounted in the side of the spirometer base. This tubing valve can be used for either an open or closed circuit. It has tubing attachments for one or two tubes on both the back and the front. It also has two ports to atmosphere. When the rotating handle is down, the mouthpiece tube or tubes are vented to the atmosphere. When the handle is rotated up, the mouthpiece circuit is connected into the spirometer circuit. This not only allows the subject to become accustomed to the apparatus with the tubing vented to atmosphere, but also allows an exact starting time to be determined for the experiment.

  The soda lime canister is made of transparent plastic, and can therefore be used with a color indicating absorbent. The canister is 80mm in diameter x 125mm in length (3 ¼ x 5 in), and has a capacity of 600 ml. it mounts on a metal plate at the back of the spirometer, and can be connected in or out of the circuit by changing only one hose.

  Download:spiro meter diagram

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