new Roto Relay works like a motor in
E L E C T R O N I C I zl =< mm Electronic Relay Model # 4 is the most important advance in the design of highly sensitive electronic relays for the control of relatively large amounts of power. Every conceivable relay improvement is embodied in this new instrument. It is designed with the new RotoRelay, a completely sealed mercury contact relay in a steel chamber. RotoRelay employs a sealed mercury switch tube which is tilted to the open-circuit or closed-circuit position by a highly efficient magnetic circuit. There is no sliding plunger within the mercury tube. This means you get positive action . . . no danger of sticking or breaking! The d.c. power impact for reliable operation of RotoRelay with a 35-amp mercury tube is less than one watt, compared with four watts for a mercury plunger relay.
MANOSTAT
Also you achieve direct current in the control circuit. You can use unlimited lead wires to your control, making it independent of capacitance changes. The control circuit operates with micro currents. The Electronic Relay Model # 4 is in a corrosion resistant case convenient for permanent installation or bench use with a 15 amp line cord and power receptacle. For complete information, write your Laboratory Supply Dealer TABLE OF RELAY CHARACTERISTICS —Model # 4 Load Current
35 amps. 115 volt AC
Control Voltage
7 volts DC open circuit
Control Current
1.5 microamps DC closed circuit
Catalogue No. Price
M24875 $115
MANOSTAT Corporation 20-26
Ν. MOORE S T R E E T
For further information, circle number 56 A on Readers' Service Card, pate 87 A
56 A
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ANALYTICAL CHEMISTRY
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NEW
YORK
13. N E W
YORK
