V O L U M E 2 4, NO. 11, N O V E M B E R
laboratory news
1952
for the
41 A
First
time
low flow rate measurements are not only predictable, but repeatable, with high accuracy — outmoding all other laboratory flow rate meters.
LOW CAPACITY KIT A new monochromator is now offered which eliminates the elaborate paraphernalia of arc light and prism spectroscope to secure monochromatic light. The new monochromator employs an ordinary tungsten light source and uses the rotary power of quartz. It will be welcomed for microscopy and other purposes which require monochromatic light. Not only does the monochromator represent simplified equipment but it gives an increased intensity of light as well. Collimated light from a tungsten filament lamp will yield adequate illumination at all wave lengths because of the large aperture available — a full inch. In this quartz monochromator, white light from the tungsten source is passed through basal sections of optical quartz laminated to polaroid sheets. By a synchronous rotation of the quartz sections, the wave lengths of the transmitted light can be varied continuously through the visible spectrum. T h e i n s t r u m e n t produces an average band width of 150 Angstrom units. A built-in adjustable support is provided for tilting the device in line with the light source and the microscope or other apparatus to be used. The prism spectroscope uses a space-taking, cumbersome, carbon arc light source. I t requires direct current and a mechanism to keep carbon points in adjustment. Light passing through prism yields as little as . 5 % beam on slide. The new quartz monochromator uses ordinary inexpensive tungsten filament lamp as light source. No maintenance is necessary — bulbs are changed quickly and easily. For prices and delivery of t h e monochromator, write Cambridge Thermionic Corporation, 475 Concord Ave., Cambridge 38, Mass, (ADVERTISEMENT)
This laboratory kit utilizes the new Fischer & Porter Tri-FUt tubes, an outstanding advance in the measurement of low Mow rates. Covers flow ranges of 0.07 to 800 cc ; min. of water or S to 34.500 std. ce min. of air. Complete with 5 sizes of Tri-Flat tubes, glass and sapphire floats, data handbook, and carrying case. $95. f.o. b. Hatboro.
Predictable Performance FLOW TEST METER KITS Fischer & Porter high capacity kits are ideal for pilot plant or field flow checking work. They fire readily portahle, protectively housed in a new and improved case, available with brass or stainless steel end fittings or with rubber hose HIGH CAPACITY KITS connections. Covers a flow range of 15 c c ' m i n . to 6.60 G P M water or 690 std. cc/min. to 27 SCFM air. Write now for complete information.
FISCHER & PORTER COMPANY
1 0 1 0 C o u n t y Line R o a d , H a t b o r o , P e n n a . ©1856-R
