More than likelyyou already haveaTecamthermostaticwater bath-its so quiet, so well made, so efficient, so economical' you probably take it for granted. If you haven't got one or need another -write to us and we will tell you all about this full range and the accessories. If you have any special requirements, then don't hesitate to call on Techne'saccumulated know-how.
Model FTS-16, a spectrometer system for the far-infrared, utilizes a nondispersive, step-scanned Michelson interferometer in an evacuable optical assembly which includes a chopped mercury-quartz source, a highly adaptable sampling arrangement, and a selection of interchangeable detectors. Nominal wavelength coverage extends from 25 to 1000 ^m at up to 0.2 cm - 1 resolution. The data system includes a stable lock-in voltmeter, a 1:10,000 digital converter, and a heavyduty paper tape punch. Block Engineering, Inc., 19 Blackstone St., Cambridge, Mass. 02139 413
and it comes in five sizes Techne Incorporated 661 Brunswick Pike Princeton New Jersey 08540 USA Telephone (609) 452-9275 Circle No. 75 on Readers' Service Card
Pipetting Device
micromeritics ORR SURFACE-AREA PORE-VOLUME ANALYZER measures surfaces areas precisely from 0.001 mVgm u p . . . uses any non-corrosive gas as adsorbate... no calibration!
MODEL 2100 also for pore size & volume a n a l y s i s . . . chemisorption studies
Write for complete descriptive literature, technical information and details on obtaining sample analysis of your material. AND TECHNICAL
SERVICE
FOR T H E M A T E R I A L S
INDUSTRY
m i c r o m e r i t i c s i n s t r u m e n t corporation
124A
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Accurate and precise pipetting is made simple with the polyethylene PiPump pipetting device. I t is safe to use even with corrosive or toxic liquids. A micro Pi-Pump is available with a stroke-adjustment feature which permits the user to preset the stroke of the plunger. A knurled, threaded collar sets the stroke to dispense precise repetitive doses. The standard Pi-Pump is available with or without the strokeadjustment feature. Bel-Art Products, Pequannock, N. J. 07440 414
Surface Analysis
proven 3 r d generation design / most versatile, accurate instrument available / all-metal system utilizing classical l o w temperature gas adsorption B.E.T. t e c h nique / direct pressure read-out f r o m 0.0001 m m t o 1000 m m Hg / constant volume m a n i f o l d / temperatures precisely c o n t r o l l e d and measured f o r accurate d a t a / range from 0.001 m 2 / g m , no k n o w n upper limit / accuracy and r e p r o d u c i b i l i ty 0.5% / size 2 2 " W by 2 3 " D by 6 8 " H.
INSTRUMENTS
New Products
BOO g o s h e n s p r i n g s r d . n o r c r o s s , georgia 3 0 0 7 1 ( m e t r o atlanta) phone C404] 4 4 B - B 2 8 2 Circle No. 127 on Readers' Service Card ANALYTICAL CHEMISTRY
Model 139, a double beam ATR accessory for infrared spectrometry, speeds surface studies of solid, opaque, or insoluble samples. The accessory, featuring a dual optical system, is invaluable in quantitative and qualitative analysis of extremely thin films, weathering of surfaces, transmigration of chemicals and coatings of almost any type. Sample and reference beam stages are both kinetically mounted on a common base which is readily adjustable to conform to the beam separation of any I R spectrophotometer. Model 139 double beam ATR unit with integral optical attenuator comes with two KRS-5 crystals and two sample holders. Barnes Engineering Co., 30 Commerce Rd., Stamford, Conn. 06902 415
