48 A
ANALYTICAL
CHEMISTRY
GLASS ABSORPTION CELLS OF
MA
FINE
QUALITY
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Complete Electrophoresis Apparatus SCIENTIFIC APPARATUS Klett-Summerson Photoelectric Colorimeters Colorimeters - Nephelometers - Fluorimeters Bio-Calorimeters - Comparators - Glass Stand ards - Glass Cells - Klett Reagents
ZUcttoUutomal
KLETT
MANUFACTURING CO. 177 E A S T 8 7 T H S T R E E T NEW YORK Ν . Υ.
HEATING TAPES
{Heat where you want it!) These tapes consist of one or more fabric bands of resistance wire sep arated or bordered by bands of high temperature resisting glass fibre yarn. The width and length of the various tapes are carefully deter mined by the current carrying capacity of the resistance wire. Tem peratures of 400° centigrade and over can be reached inside a glass tube of 2 mm. wall thickness. The tape is simply wound around the body to be heated, and is held in position by glass laces at both ends. A suitable control device such as a variable auto-transformer or Power stat should be employed. Three types of Electrothermal Heating Tape are now available— Uninsulated, insulated on one side, and insulated on both sides. Insulated on 1 side Insulated on both sides Length, Width, Watts Amps. Cat.Unin&ulated at No. 6S080, each Cat. No. 65090, each Cat. No. 65100, each cm. m m . 230 V. 0-8 25 100 90 9.65 11.40 14.70 1-5 64 250 125 12.25 14.90 18.75 2-3 76 450 ISO 16.65 20.15 26.45 2-6 89 500 180 19.25 22.95 29.40
55809 Variable Transformer, Powerstat. For controlling temperature of heating tapes. Transformer has an input rating of 115V, 50/60 cycles. Maximum output rating, 7.5 amps E a c h $23.00
STANDARD SCIENTIFIC 3 4 West 4 t h Street
SUPPLY CORP. New York 12, Ν. Υ.
