ANALYTICAL
28 A
CHEMISTRY
Announcing à New
A NEW MACBETH
TEMPERATURE CONTROLLER
ρ Η METER
AND INDICATOR
Plus Performance—Moderate
Price
Ideal for electric furnaces, ovens, melting pots, heating tanks and other heating devices. •
Unlike rheostat or synchronous motor driven input controls this instrument maintains constant watt hour input and even temperature regardless of normal fluctuations in line-voltage.
•
By turning the control knob to right or left the temperature can be raised or l o w e r e d and the operator can select any desired temperature which is automatically maintained.
•
O n l y 5 to 20 watt hours are required to operate the controller, permitting nearly all of the p o w e r to be consumed in useful load.
•
The controller is automatically compensating for changes in room temperature.
•
Control dial markings indicate percentage of watt-hour input of connected load.
•
Standard replaceable fuse is built in for protection against overloading.
•
Connections are easy and simple — remove back cover, t w o terminals each for thermocouple, line leads and load leads, all plainly marked on large terminal board.
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Openings for connecting wires are lined w i t h rubber grommets and for permanent installations w i l l accommodate l/t" conduit fittings. SPECIFICATIONS A N D PRICES — Series 500 (With Pyrometer) Model
Maximum Watts Load
Volts
Cycles
Amperes
Pricet
AC-525A1 AC-520A2 AC-525D1 AC-520D2 AC-535A1 AC-530A2 AC-530A3 AC-530A4
2300 2300 2300 2300 4000 5700 4000 5700
115 230 115 230 115 230 115 230
50/60 50/60 DC DC 50/60 50/60 25 25
20 10 20 10 35 25 35 25
$42.50 45.00 57.50 60.00 52.50 55.00 55.00 57.50
t F, Ο . Β. Shipping Point
Shipping Weight A p p •ox. 9 Lbs.
LAPINE & COMPANY
ARTHUR S. lABORATORY
APPARATUS
1 0 9 W . Hubbard St.
S
REAGENTS
·
I N D U S T R I A L
CHEMICALS
Chicago 1 0 , Illinois
MACBETH CORPORATION 2 2 7 West 17th Street
N e w Y o r k 1 1 , Ν . Υ.
