EQUIPMENT
ISA Show Points Up Instrument Advances Instrument trend continues toward higher accuracy, more reliability, greater use of all solid state circuitry Improvement of existing instruments in accuracy, simplicity, ease of maintenance, reliability, and similar characteristics was the keynote of the Instrument Society of America's 16th Annual Instrument-Automation Conference and Exhibit in Los Angeles earlier this month. There were no startling innovations. or radically new ideas in instrumentation, but there was much evidence of solid progress in the improvement of design. Beckman Instruments, pioneer in the field of p H measurement, has a new industrial Model J pH analyzer which the company says is easier to install, operate, and maintain compared with earlier models. It is also more accurate and more reliable.
The new instrument uses solid state electronics exclusively, and each unit of the circuit, such as the power supply and the amplifier, is contained on a single plug-in printed circuit board for ease in maintenance. The unit fits in 3 6 X 6 in. cutout on a panel board and is available in either a potentiometric or a universal version. The former has an output of up to 100 mv. and is intended to be used with a conventional potentiometric recorder. The universal version can be used with either a potentiometric or a current type recorder or with both simultaneously. The instrument case is completely sealed and can contain a desiccant. And by improving the reliability and
ELECTRIC ACTUATOR. A. E. Morgan demonstrates a new electric valve actuator developed by Lear on the basis of experience in aircraft instrumentation 54
C&EN
SEPT. 25, 1961
versatility of the electrodes, Beckman has reduced the number of electrode types needed to cover all applications from about 40 to nine. Process Chromatograph. Foxboro's process chromatographic analyzer will continuously record the concentration of up to six components in the stream being monitored. The chromatographic column is a series of U-tubes which can be connected to give one 40-ft. column or a number of shorter columns. The programer is a 38-in. continuous steel tape driven by an electric motor. A small metal button is affixed to one edge of the tape to actuate the sample injection switch at the desired interval. Similar buttons on the other edge of the tape are set at times corresponding to the peak heights of the components. The output of the thermal conductivity detector is converted to a pneumatic signal which passes through a mercury-filled check valve. The maximum peak height is then recorded by the pen corresponding to the component for that peak. The record for each component thus consists of a line representing the maximum heights of a series of peaks and measures the trend in concentration. Electric Valves. Both Foxboro and Lear, Inc., have developed all-electric valve actuators. This is evidence of an increasing interest in the use of electronic rather than pneumatic signals. Lear has drawn on its experience in the aircraft instrument field and designed its valve around two magnetic particle clutches. A belt drive from a continuously running electric motor turns two pulleys in opposite directions. The appropriate magnetic particle clutch couples one of the pulleys to the gear which actuates the valve. Lear showed a prototype of an allelectric valve. The company, with no marketing experience or organization in this field, has not yet decided on its marketing plans. The increasing trend to solid state
NEW ENTRY. Foxboro, too, has an electric actuator, which eliminates transducers in all-electric systems
circuitry is also evident in many of the new laboratory instruments. Varian Associates introduced two such units, the G-14 graphic recorder and the G-24 ion gage recorder. The G-14 uses all solid state circuitry for added reliability. Varian says that the G-14 provides a highly stable, accurate, and reliable recording of the input variable. The ion gage recorder provides a continuous recording of pressure from 10~ 3 mm. to 1 0 - 9 mm. of mercury. It is designed for use with most com mercially available ion gage tubes and supplies the operating and degassing power for the tube. The filament con troller is all solid state. Blending System. Fischer & Porter showed its in-line blending system based on a turbine flow meter, a ratio setter and sealer-totalizer, a digital comparator, and related equip ment (C&EN, Feb. 27, page 5 0 ) . The system made of these com ponents can be designed to blend any where from two to 20 or more streams. Since the entire measuring system is digital, the accuracy of the blending system is as good as that of the pri mary flow elements. The system has an electronic mem ory which holds a cumulative total for any one ingredient. It then com pensates continuously for any devia tion from the required total blend. Cumulative error is displayed digitally on the comparator; total volume of each stream is also continuously dis played on the sealer-totalizers.
MAIL THIS COUPON TODAY FOR COMPLETE MICROSCOPE INFORMATION Gentlemen: Please send me information on these new Elgeet Stereo Microscopes and Booklet SM-761. Name Company. Address
City_
. State, Mail to: ELGEET OPTICAL CO., 838 Smith Street, Rochester, Ν. Υ.
SEPT.
25,
1961
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in all these Torsion Dial In all these Torsion Dial Balances..,
NO
TORSION MODEL DWL-3
Capacity: 200 grams Weight-loading Dial: up to 9 grams by 1 gram increments Fine Weighing Dial: 1 gram by .02 gram graduations* (Readability: .005 g) TORSION DLT2 Capacity: 120 grams Dial graduated 1 gram by .01 gram graduations Readability of Dial: 2 mg
knife
edges to
become lull
That's why Torsion Balances (with or without weight loaders) retain then- original
TORSION DWL-5 Capacity: 500 grams Weight-loading Dial: up to 90 grams by 10 gram increments Fine Weighing Dial: 10 grams by .1 gram graduations (Readability: .02 g)
TORSION DLT2-1 Same specifications as DLT2 but has scoop for seeds or other bulky material ι
TORSION DWL-2 Capacity: 120 grams Weight-loading Dial: up to 9 grams by 1 gram increments Fine Weighing Dial: 1 gram by .01 gram graduations (Readability: .002 g)
accuracy after rnsre than j minion operations.
Torsion also rricm^ianures a line of "no-knife-edge" balances with capacities uo to 30 kilograms, mile for Catalog DL for complete information*
TORSION BALANCE Main Office and Factory: Clifton» New Jersey Salas Offices: Ctticago, 111., San fylatto, Cat
TORSION DLT5 Capacity: 500 grams Dial graduated 10 grams by .1 gram graduations Readability of Dial: .02 grams
TORSION DWL2-1 Specifications are same as the DWL-2 except that this model has scoop for seeds or other bulky material
TORSION DRx Capacity: 120 grams Dial graduated 15 grains by YB grain graduations and 1 gram by .01 gram graduations Readability of Dial: VA dial division
NEW EQUIPMENT Automatic
laboratory
mortar that
works with a wide range of either wet or dry materials is being marketed by Schuco Scientific, New York, N.Y. The Pulverisette 2 has a capacity of 100 c c , and has large grinding sur faces for maximum efficiency. Grind ing elements are available in five materials, and are completely inter changeable. The charge is ground to uniform fineness under a dustproof seal so that contamination and loss of material are prevented. Ε 30
Isostatic pressing systems for making high density, uniformly compacted metal or ceramic parts by hydraulic pressure are now available as complete package units from Autoclave Engi neers, Inc., Erie, Pa. Included are required pumping equipment, com pression cylinder, pressure vessel, valves, and instrumentation. Systems can be designed for either manual or automatic operation, and capacities range from small research size units to large production systems. Ε 31 A solution metering pump which de livers minute quantities of a variety of liquids is being marketed by Beckman Scientific and Process Instruments Di vision, Fullerton, Calif. The pump is available in four ranges: 0 to 2, 0 to 5, 0 to 10, and 0 to 20 ml. per minute. A turn of a precalibrated knob, which reads to thousandths of milliliters per minute, sets liquid flow with an ac curacy of ± 2 % of the pump's full range, the company says. The pumps are useful in applications where small quantities of fluids must be precisely measured, such as drug infusion studies, organic synthetic research, re action rate studies, or pilot plant operations. Ε 32 Carbon monoxide analyzer from Gelman Instrument Co., Chelsea, Mich., can analyze samples within a few sec onds. The standard instrument has switch-selected ranges of 0 to 0.05% and 0.03 to 0.25%. The instrument gives results directly in percentage of carbon monoxide in a gas stream. The analyzer can be used to check gases in heat treating operations, to monitor carbon monoxide concentra tion in air pollution studies, to monitor automobile exhausts in tunnels and
garages, and as a safety device in chemical plants. It's also suited to measure carbon monoxide produced in chemical reactions, and to deter mine the percentage of carbon mon oxide generated in closed tanks. Ε 33
Tritium monitor is being oflFered by Atomic Accessories, Inc., Valley Stream, N.Y. The Model TSM-91B warns against overtolerance concen trations of tritium in the atmosphere, and also monitors surfaces for alpha and low-energy beta emitters. The panel meter reads directly in microcuries of tritium per cubic meter of air. Users may preset the alarm to any ionization level. Ε 34
Valves from Valcor Engineering Corp., Kenilworth, N.J., are designed to handle liquid metals and metal vapors at temperatures up to 2200° F. and pressures of 1000 p.s.i. The Series V-4200 valves are machined from solid forging or bar stock, and the seats are integral parts of the inlet and outlet connections. Sizes up to 1 in. are available. Ε 35
Pointer galvanometer from Howell In struments, Inc., Fort Worth, Tex., is designed for use in panel or portable instruments of the null type. The Model H2000 is a taut suspension, moving coil instrument with an Alnico V permanent magnet that ensures high permanent flux density. Systems with resistance values from 10 to 1000 ohms, and systems with sensitivi ties from 1.25 to 0.15 microamperes per millimeter scale division are avail able. The instrument is 2 in. in di ameter, 31/2 in. long, and weighs 11 oz. " Ε 36
Laboratory electromagnet is available from Magnion, Inc., Cambridge, Mass. The Model UFS-3 can produce up to 12 kilogauss over a working volume of 2-in. diameter by l-in.-wide gap with its plug-type poles installed. Re moval of the poles allows operation as an air core, optimum geometry, sole noid with a 2-in. bore that is capable of producing over 4 kilogauss. The magnet is suitable for uses such as Zeeman effect, magneto-optics, Fara day effect, and magnetic materials re search, the company says. The com
plete solenoid with poles weighs less than 100 lb., and it measures about 8 X 8 X 8 in. Ε 37
Transducer that measures liquid level and converts it directly to an electrical resistance is being marketed by Magnetrol, Downers Grove, 111. The Model DLR transducer may be used with resistance-type reading instru ments for remote level indication, alarm, recording, or control. Various length displacers are available, and an adjustment is provided to calibrate the transducer for liquid specific gravity variations of from 0.7 to 1.1. E38
Hydrogen generator to supply the hy drogen and air necessary for operation of flame ionization detectors has been developed by Wilkens Instrument and Research, Inc., Walnut Creek, Calif. The hydrogen is generated by elec trolysis, and operation of the Model 650 is easy, requiring no attention other than refilling with distilled water twice each month, the company says. The adjustable flow rate of 10 to 40 ml. per minute is read directly on a large meter. Filtered air at 300 ml. per minute is supplied by a small vibratory pump. Ε 39
Nylon pressure tubing from Garlock Inc., Palmyra, N.Y., eliminates prebending and the need for flexible coup lings or intermediate fittings. The tub ing resists fatigue, abrasion, most cor rosive agents, and withstands tempera tures from - 4 0 ° to 185° F., the com pany says. The 9056 tubing is avail able in sizes from 1 / 8 to 1/2 in. Ε 40
Agitator for use in the baking, candy, chemical, and pharmaceutical indus tries is being manufactured by Hamil ton Kettles Division, Brighton Corp., Cincinnati, Ohio. The Hamilton Type-TD unit can be operated with three agitators which work together, when thorough mixing and heat trans fer are needed. When only a stirring action is needed one or two agitators can be removed. Ε 41
Further useful information on keyed Equipment items mentioned is readily available . . .
j j I
Use handy coupon on page 66
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SEPT. 25, 1961 C & E N
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