Hot Plate
A look at what is currently available on eBay
 Harker calendar china hot plate for 1929 No Reserve US $19.95 
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 Watkins Dutch Brownie Pie w/Cinnamon Hot Fudge Sauce 1983 Pie Plate US $8.99
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 Northeast Airline Hot Plate Trivet Tile US $9.99
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 Bicentennial Hot Plate/Trivet Tray/Pot Holders/Ben Franklin Mug/Coasters + US $14.99
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 The Original KEEP IT HOT Plate *NEW* US $2.50
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 The Original KEEP IT HOT Plate *NEW* US $2.50
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Can a hot plate/Bunsen burner keep a constant temperature?
I need to design an experiment to do with measuring temperature of water in a beaker, and I need to use four different temperatures, but I don't know how to keep the temperature in the water constant! Can you do this with a hot plate?
Place the beaker of water on a hot plate and set it to a given position of the temperature controller (if it has one) and observe the water temperature over a reasonable time period (after the water comes to temperature) using a scientific thermometer. That will let you know whether the temperature cycles.
Some hot plates are either on or off and others may use a thermostat to turn the plate on or off as needed to regulate temperature within a band. Still other hot plates may have settings that controll constant electrical current at different set points and may remain steady.
If the hotplate you use cycles you may try a double boiler (experiment within the inner pot or beaker) to minimize effects of any cycling. Improvise your own 'double boiler.'
You could also try a double boiler on a Bunsen burner adjusting the flame to control temperature in the outer pot.
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May 15th, 2005 in
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