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WHV DRAW WHAT YOU CAM RECORD? Vy Ε don't know that anyone has ever counted the hours scientists spend drawing curves, but in a busy laboratory it runs w^ll into the thousands every year. The time that's spent plotting instrument readings can be used for more profitable work if you let Fisher RECORDALL draw the curves for you. READ RECORD CONTROL The RECORDALL is the first truly universal laboratory recorder. It will record any instrument reading that can be converted into the proper electrical signal. BuiLt-in circuits and special adap- ters make it three instruments in one: A DIRECT-READING INDICATOR with clip-on scales for every function and range . . . A VARIABLE-SPEED RECORDER which uses standard strip charts . . . A CONTROLLER which turns external cir- cuits on and off when the recorded signal is above or below a pre-set control point. You don't have to buy expensive recording models of your instruments, with limited ranges, when you can use the RECORDALL· with your present equipment. TO BE MORE SPECIFIC . . , The RECORDALL records the following vari- ables directly or with convenient adapters: DC CURRENT—in 11 ranges from 5.5 micro- amperes to 550 miUiamperes, full scale. DC POTENTIAL—11 ranges, 5.5 millivolts to 550 volts, full scale. RESISTANCE—6 ranges, 11 ohms to 5500 ohms full scale. TEMPERATURE from -100°C to 320°C in two ranges with the Fisher Resistance Ther- mometer Bulb. TEMPERATURE from 0 t o 1000 °C with a Chromel-Alurnel thermocouple. PRESSURE—3 ranges: O-1O0 psi, O-5O0 psi, and a compound range for 0-30 " of mercury (vacuum) and 0-50 psi (pressure) . VACUUM—1 to 1000 microns of mercury. POLAROGRAPHIC CURRENT -with an adapter which makes the Fisher Elecdropode® an automatic recording instrument. p H from 0 to 11 with Beckman H-2 pH Meter and the RECORDALL Zero Shifter. Other adapter kits are being developed for the functions in greatest demand. ^ïswKi^^^iM^ïeNlÎWiCl Β ο stdn |f Buttdlon ChicagoW ^CIiBveiahci M^t^^3: >Newv Ybik : ά ? Philadelphia iJ'lPittsb^hl^! : ; .;'^SI.^.1OUÎSIÎ; V \X:·-· Washington ^Montreal! ÎfâTorbntb'; ; SS \Amen;cti's Largest Ma bu f^cturër-Iiîstrilautbr of •Eabprator^Applîànces arid Reagent Chemicals The Fisher RECORDALL gives you the advantages of a sensitive recorder on all of your busiest instruments. For full details of the RECORDALL and its accessories? write to 717 Forbes St., Pittsburgh 19, Pa., for booklet FS-251-13. 1804 CHEMICAL AND ENGINEERING NEWS

WHY DRAW WHAT YOU CAN RECORD?

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WHV DRAW WHAT YOU CAM RECORD? Vy Ε don't know that anyone has ever counted the

hours scientists spend drawing curves, but in a busy laboratory it runs w^ll into the thousands every year. The time that 's spent plotting instrument readings can be used for more profitable work if you let Fisher RECORDALL draw the curves for you.

R E A D R E C O R D C O N T R O L

The RECORDALL is the first truly universal laboratory recorder. I t will record any instrument reading that can be converted into the proper electrical signal. BuiLt-in circuits and special adap­ters make it three instruments in one:

A DIRECT-READING INDICATOR with clip-on scales for every function and range . . . A VARIABLE-SPEED RECORDER which uses standard strip charts . . . A CONTROLLER which turns external cir­cuits on and off when the recorded signal is above or below a pre-set control point. You don't have to buy expensive recording models of your

instruments, with limited ranges, when you can use the RECORDALL· with your present equipment.

T O B E M O R E S P E C I F I C . . ,

The RECORDALL records the following vari­ables directly or with convenient adapters:

DC CURRENT—in 11 ranges from 5.5 micro­amperes to 550 miUiamperes, full scale. DC POTENTIAL—11 ranges, 5.5 millivolts to 550 volts, full scale. RESISTANCE—6 ranges, 11 ohms to 5500 ohms full scale. TEMPERATURE from -100°C to 320°C in two ranges with the Fisher Resistance Ther­mometer Bulb. TEMPERATURE from 0 to 1000 °C with a

Chromel-Alurnel thermocouple. PRESSURE—3 ranges: O-1O0 psi, O-5O0 psi, and a compound range for 0-30 " of mercury (vacuum) and 0-50 psi (pressure) . VACUUM—1 t o 1000 microns of mercury. POLAROGRAPHIC CURRENT -with an adapter which makes the Fisher Elecdropode® an automatic recording instrument. pH from 0 to 11 with Beckman H-2 pH Meter and the RECORDALL Zero Shifter.

Other adapter kits are being developed for the functions in greatest demand.

^ïswKi^^^iM^ïeNlÎWiCl Β ο st dn | f Buttdlon Chicago W

^CIiBveiahci M^t^^3:

>Newv Ybik :ά

? Philadelphia iJ'lPittsb^hl^! :;.;'^SI.^.1OUÎSIÎ;V\X:·-·

Washington

^ M o n t r e a l !

ÎfâTorbntb';;SS

\Amen;cti's Largest Ma bu f^cturër-Iiîstrilautbr o f •Eabprator^Applîànces arid Reagent Chemicals

The Fisher RECORDALL gives you the advantages of a sensitive recorder on all of your busiest instruments. For full details of the RECORDALL and its accessories? write to 717 Forbes St., Pittsburgh 19, Pa., for booklet FS-251-13.

1 8 0 4 C H E M I C A L A N D E N G I N E E R I N G N E W S