384 1-800-452-1261
Mechanics Equipment, continued
Smart Timer for Air Track
The purpose of this device is to allow precise timing of experiments done with the Air
Tracks. Timer contains seven separate functions and may be used to count time or
measure acceleration when used with air track and collision devices. Device uses a
six digit LCD and has a timer range of up to 1,000 seconds, with an accuracy of 0.0001
seconds. Timer conveniently displays functions with a large graphical user interface.
Includes two photogates.
Catalog No. Description Price/Each
AP8155 Smart Timer for Air Track $410.00
Universal Spark Generator
Set the spark generator on one of eight frequencies (60, 30, 20, 15, 10, 5, 2 and 1 Hz)
at a voltage of around 30 kV. On an air track, the spark paper attaches along the
track’s bottom edge. A short piece of wire attaches to the glider with an insulated
nylon screw. A trolley wire stretches between the end stops with insulated hardware.
The spark jumps from the wire on the glider, then through the spark paper to the
grounded track, leaving a mark for each pulse. Includes 1.2-m alligator-clip connections.
Controlled by a manual pushbutton trigger. Dimensions: 9.5 × 26 × 22 cm.
Catalog No. Description Price/Each
AP5712 Universal Spark Generator $765.00
AP5766 Spark Paper, 100 m 37.20
MECHANICS EQUIPMENT continued on next page.
Universal Spark Generator
AP5712
Smart Timer
for Air Track
AP8155
Electronic Stop Clock
Line-powered, more expensive, but we think it is worth it. There is no AC adapter
to lose or batteries to replace just before the lab starts. Our six-digit electronic
stop clock provides memory and period measurement with a resolution of 0.0001
s. The timer base is generated by a 10-k Hz quartz crystal with a lifetime accuracy
of ±0.02%. The clock can be operated with one or two photogates, measuring the
interruption of a single photogate or the time between breaking a pair of gates.
Includes one photogate.
Catalog No. Description Price/Each
AP5745 Electronic Stop Clock $635.00
Electronic Stop Clock
AP5745
Acceleration Timer—AC
Acceleration timer produces precisely 60 dots per second on a moving strip of paper.
Demonstrate increases in velocity and precisely calculate acceleration, drag, and
friction by measuring the interval between a series of dots. Includes paper, carbon
paper disks, and a plastic feeler gauge.
Catalog No. Description Price/Each
AP9221 Acceleration Timer—AC $80.85
AP9222 Replacement Paper 5.46
Acceleration
Timer—AC
AP9221
Acceleration Timer, AC, Mountable
The built-in two-way, ring-stand–clamp holes allow for easy setup on an upright
support rod or cross bar. The timer unit produces 60 dots per second on a moving
strip of paper. Comes complete with 1.8-m cord with an on/off switch, a roll of tape,
red and black carbon disks and instructions including experiment suggestions.
Catalog No. Description Price/Each
AP5612 Acceleration Timer, AC, Mountable $59.55
AP5613 Replacement Tape 4.65
AP5614 Replacement Carbon Disks, Pkg. 12 5.17
Acceleration Timer—DC
Powered by two 1.5-V “D” cell batteries, this timer can be clamped down anywhere
in the laboratory. The 13 mm wide paper is guided over a striking surface at a rate
between 30 to 50 marks per second. The rate can be slowed by inserting an aluminum
rod (included) in place of one battery. Carbon discs and a roll of paper included.
Catalog No. Description Price/Each
AP9245 Acceleration Timer—DC $54.35
Accelerometers, Electronic See page 635.
Acceleration
Timer—DC
AP9245
Acceleration Timer,
AC, Mountable
AP5612
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