The finest $150. Flowmeter Ever Made. New thermal technique gives Matheson Flo-Tronic Flowmeter accuracy without a big price tag.
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desiccator that's unbreakable and beautiful...
Flo-Tronic Flowmeter offers many distinct advantages over rotameters, yet costs little more. As with mass flowmeters, changes in pressure and temperature have little effect on accuracy of reading. FEATURES: Adapted for Recorder Use · Remote Monitoring Use • Fast Response—2 sec. (0 to full scale) · Accuracy ± 3 % of full scale · Reproductibility ± 2 % of full scale · Four Flow Ranges — 0-300 to 0-10,000 std. cc./min.
M A T H E S O N GAS P R O D U C T S Write for Engineering Report to Matheson, P.O. Box 85, East Rutherford, Ν. J. 07073. Circle No. 4 on Readers' Service Card
BETHLEHEM INSTRUMENT MERCURY BEST IN PURITY To qualify as Instrument Mercury, the total residue after complete evaporation of a 200 gram sample may not exceed one part im purity per ten million. All BETHLEHEM Instrument Mercury fully meets this rigid standard—and proves it with the analysis certification included in each shipment-
from the top of its transparent, distortion-free dome to the bot tom of its blue-green base. That's w h y you'll be proud to o w n a new Nalgene® Vacuum Desiccator. In side this spacious desiccator you can use our new ceramic-metal desiccator plate of Nucerite® or any other one you'd like. When you specify Nalgene Labw a r e , 20 years' l e a d e r s h i p says you're right. Ask your Laboratory Supply Dealer for our new Cata log, or write Dept. 6803, Nalgene Labware Division, Rochester, N.Y. 14602. NALGENE LABWARE DIVISION
NALGE SYBRON CORPORATION
Circle No. 55 on Readers' Service Card
CONTINUOUS VACUUM, TRIPLE DISTILLATION ALL BETHLEHEM INSTRUMENT MER CURY IS PURIFIED IN THESE STILLS which operate in three continuous stages under vacuum and controlled low tempera ture.
BEST IN PACKAGING BETHLEHEM Instrument Mercury is avail able in five different polyethylene bottles, with plain cap on the 16-lb. and 65-lb. bottles, and the unique dispensing tip on the 9-oz., 1-lb., and 6-Ib. sizes. (Five and 10-lb. glass bottles are also available.)
BEST IN SERVICE BETHLEHEM exchanges dirty or scrap mer cury for Instrument Mercury. We supply empty flasks free for safe storage and in expensive shipment to us.
Over one million pounds shipped to manufacturers, laboratories
process and control
research industries.
BETHLEHEM APPARATUS COMPANY, INC. HELLERTOWN, PA. Circle No. 20 on Readers' Service Card
VOL. 4 1 , NO. 3, MARCH 1969
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