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NEW PRODUCTS pH Controller The Dual-Dial pH controller can be used with any line-operated pH meter for process control or in the laboratory for acid-base titrations. For pH con trol, a dial is used to set the pH and a control span is adjusted to the desired limits. The signal from the pH meter actuates acid or base addition as nec essary to maintain the set point within the limits. The digital direct readout set point dial is precise to the nearest 0.01 pH unit. The instrument range is from 0 to 10 pH units. Fermenta tion Design, Inc., P. O. Box 212, Edi son, N. J. 413
WHEN YOU WANT IT NOW! If it's listed in our catalog, you can get it NOW . . . through the best Distributor net work in the business. MC&B distributors are linked with our plant and warehouses by TWX or direct line, and we back up their inventory with our own 100% stock of 5000 chemicals. When service is impor tant, reach for the "NOW" Book". Write for your copy. MC&B Division of the Matheson Co., Inc., East Ruther ford, N. J., Norwood, Ohio.
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A totally transistorized X-Y recorder accessory, the Model 470 Keyboard, provides automatic point-plotting of tabular data in graphic form on stand ard coordinate paper. It enables the operator to handle a wide variety of complicated data with the same ac curacy and speed as a common adding machine. Electro Instruments, Inc., San Diego, Calif. 414
Automatic Solid-State Scaler
MCB
organic chemicals biological stains
laboratory reagents indicators sptctroquality
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ANALYTICAL CHEMISTRY
solvents
An automatic scaler, the Multi/Matic series, employs the latest solid-state circuitry. The scaler is operational with Geiger, proportional, or scintilla tion detectors and is ideally suited for biological, biochemical, or other re search areas where radioactivity is pres ent. Compact in design, the Multi/ Matic Scaler incorporates a precision high voltage power supply, decade scaler, electronic timer, and either lister or computer data readout versions. The scaler measures the radioactivity present in either samples or environ ment. Tracerlab Div. of Laboratory for Electronics, Inc., 1601 Trapelo Road, Waltham 54, Mass. 415
