New Products
Most precise metering pump you can buy-.02%!
the 7100 provides variable spark dis charge rates to 400 per second. Up to four pre-set source conditions, plus a 10 A dc arc, can be selected by front panel push buttons. Solid state switch ing circuits change the capacitance, re sistance, and inductance parameters almost instantaneously. Applied Re search Laboratories, 9545 Wentworth St., Sunland, Calif. 405
a portable FURNACE
Type 1400 furnace
FAST HEAT For schools, shops or labs to 1650°F (899°C) in 40 minutes.
PORTABLE This field-proven c h e m i c a l l y - i n e r t pump sets pulse-free flows repeatable to . 0 2 % at pressures to 500 p s i . T w o c a m - a c t u ated pistons driven t h r o u g h a gear shift by a s y n c h r o n o u s m o t o r p r o d u c e a smooth, constant flow, independent of liquid pressure and viscosity. Flow rates of 2.4, 6, 12, 24, 60 and 120 m l / h o u r or 12, 30, 60, 120, 300 and 600 m l / h o u r are selected by front-panel gear shift with an absolute a c c u r a c y of 0 . 2 % . W h e n you set " 6 0 M L / H O U R , " you get 60 m l / h o u r ± 0 . 2 % . A n d the rate you get is repeatable from day to day to within 0.02%. You can pump nearly any liquid — h o w ever reactive —because only Teflon, Kel-F and borosilicate glass touch the stream. No rubber " O " rings or steel parts contact the liquid. The pulse-free high-pressure model has a u n i q u e f e a t u r e , a third prepressuring piston that prevents flew tran sients w h e n the valves switch from one drive cylinder to the other. Cost is $980 to $1480, depending on maximum flow and pressure ratings.
CHROMATRONIX Chromatronix, Incorporated, 2743 Eighth St., Berkeley, Calif. 94710. Phone (415) 841-7221 Circle No. 21 on Readers' Service Card
102 A • ANALYTICAL CHEMISTRY
M o d e l 7 5 0 P r e p k r o m a t i c , f o r h i g h reso l u t i o n , preparative scale s e p a r a t i o n s , f e a t u r e s bi-wali a n n u l a r c o l u m n s , auto m a t i c injector, t r o u b l e - f r e e c o l l e c t i o n system, and temperature programming. The c o l u m n oven holds up t o 3 0 sec t i o n s of 2.5 feet by % i n c h bi-wall an nular c o l u m n in series. M a x i m u m oven t e m p e r a t u r e is 5 0 0 °C a n d g r a d i e n t s are k e p t t o a m i n i m u m . T h e a u t o m a t i c i n j e c t o r allows r e p r o d u c i b l e o p e r a t i o n f r o m 2 0 0 μ\ t o 2 m l in 2 0 0 μ\ incre m e n t s w i t h a c c u r a c y of ± 0 . 5 % . Six glass t r a p s are a c c o m m o d a t e d in t h e c o l l e c t i o n s y s t e m . All t y p e s of s a m p l e s can be h a n d l e d by t h e collection s y s t e m SCR c o n t r o l a n d t e m p e r a t u r e p r o g r a m m i n g provide e i t h e r a u t o m a t i c or m a n ual operation. Nester/Faust Mfg Corp., 2 4 0 1 O g l e t o w n Rd., Newark, Del 19711 406
Weighs only 16 lbs.; plugs into ordinary outlets.
STEPLESS CONTROLS To 1900°F (1038°C). Temperature conven iently and accurately held.
ELEMENTS EMBEDDED Exclusive refractory plates avoid sag and damage.
QUALITY CONSTRUCTION Welded steel case with thick insulation is strong, long-lasting. Controls kept cool for long life. Newly designed door forms work loading shelf. Type 1300 -
chamber 4 " W χ 3%" Η χ
*V>" D-
Column Monitoring System Model DB-G monitors liquid-column chromatography effluents at one or more wavelengths over the range of 190 to 800 millimicrons. Designed around the DB-G UV spectrophotome ter, the system includes a concentra tion converter, a wavelength program mer, and an automatic fraction collec tor. Data can be presented on a re-
Prices $97.50
Type 1400 — chamber 4%" W χ 4 14" Η χ 6 " D. Price $125.00
Write for
free
Catalog
THERMOLYNE SYBRON CORPORATION
2555 KERPER BLVD. D U B U Q U E , IOWA 5 2 0 0 1 Circle No. 69 on Readers' Service Card
