Page 189 - Demo

“Your Safer Source for Science”
Power Supplies
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Power Supplies, continued
Power Supply, Low Voltage, DC
A high­quality four­in­one DC power supply at a low price. This very versatile DC power supply offers four­way variable regulated power with overload protection. Each of the four outputs from this power supply are precisely held at specific voltage levels and are protected from overload, shorts and excessive current demand. Perfect for driv­ ing motors, digital and analog circuitry, lightbulbs, plus much more. Qualitative analysis of V=IR can be obtained using simple calibration methods for analog meters.
Outputs:
• 12 volts DC at 1 amp
• 0–20 volts DC at 2 amps • 5 volts DC at 3 amps
Power Supply, Dual Output, Low Voltage, DC
Two independent, fully regulated outputs allow two student groups to use the same power supply. Each output’s voltage can be continuously varied between 0 and 20 volts with a current of up to 2 amps. Both adjustable outputs have an easy­to­read digital meter that displays the current and voltage readings. Once set, the voltage and current will be precisely held. A single 5­volt at 2­amp regulated output is also built­ in—great for electrolysis demonstrations. For high­voltage needs, the three independent outputs can be used together for a total DC output of up to 45 volts at 2 amps. Externally controlled cutoff circuit automati­ cally protects against overloads, short circuits and personal injuries.
Pumps, Vacuum
Microscale Bell Jar and Vacuum Set
Safely conduct lab experiments involving vacuum and air pressure with our microscale bell jar and vacuum set. Expand a marshmallow, balloon, or shaving cream. Show that liquids boil at reduced pressure. Learn by experimentation that air has mass. Perform an experiment to actually calculate the density of air. This apparatus will help increase students’ understanding of air pressure and vacuum. Instruction and experiment booklet included. Bell jar diameter 7 cm; height 8.5 cm.
Vacuum Pump, Hand-Operated, Nalgene®
Easy­to­use pump made of high­quality, corrosive­resistant polyvinyl chloride. Will quickly and easily maintain a vacuum of 25 inches of mercury and hold this level constant for 24 hours. A spring­loaded valve is provided so vacuum can easily be released without disconnecting the pump from the line. The vacuum pump nozzle fits 1⁄4" i.d. tubing with 2 feet of tubing provided with the pump. Gauge monitors vacuum in both centimeters and inches of mercury. Pump is completely sealed and is self­lubricating. Finger grips provided in squeeze­type handle. Intended for siphoning, filtration, and indirect fluid transfer.
Note: For bell jars and vacuum chambers, use AP1597 vacuum pump.
Power Supply, Low Voltage, DC AP9279
Catalog No.
Description
Price/Each
AP9279
Power Supply, Low Voltage, DC
$170.90
Power Supply, Dual Output, Low Voltage, DC AP6530
Catalog No.
Description
Price/Each
AP6530
Power Supply, Dual Output, Low Voltage, DC
$329.25
Microscale Bell Jar and Vacuum Set AP5995
Catalog No.
Description
Price/Each
AP5995
Microscale Bell Jar and Vacuum Set
$ 45.85
AP8176
Microscale Bell Jar and Vacuum Set, Pkg. of 6
192.50
Vacuum Pump, Hand-Operated, Nalgene® AP2289
Catalog No.
Description
Price/Each
AP2289
Vacuum Pump, Hand-Operated, Nalgene®
$135.30
PUMPS, VACUUM continued on next page.