ES&T PRODUCTS Data collection system Collects and classifies many different kinds of data including data from badge readers, IBM 80 column card readers, magnetic stripe and magnetic swipe readers, bar code scanners, and numeric or alphanumeric keyboards. The system can interface with virtually every type of computer. Star Com puter ' 101 Thermal printer Microprocessor-compatible printers operate over a dc range of 11-40 V. One model accepts baud rates from 75-9600 and the other accepts data at rates up to 2000 characters/s. Memodyne 102 Dry solids mixer A mixing machine for samples of dry solids has a 3-L capacity and rotates simultaneously on two axes. Contain ers are made of either transparent acrylic or stainless steel. Tekmar 103
responds to changes in oxygen in less than 3 s and has three ranges: 0-10%, 0-25% linear, and 0.25-25% log. A heater element surrounds the zirconia cell to maintain it at a constant tem perature. Datatest 105
Oxygen probe An in situ device for measuring percent of oxygen in a smokestack has a heated zirconia element at the probe end. It
Electrochemical detector This detector is capable of handling chromatography /electrochemistry applications in the single, dual series, or dual-parallel modes. The dualparallel configuration permits ratioing for identification of chromatographic peaks and also enhances selectivity. Bioanalytical Systems 106
Liquid scintillation vials Twenty-mL vials manufactured from polyethylene terephthalate are un breakable, clear, disposable, quite impermeable to solvents, and will not swell or bulge during long-term stor age. Wheaton Scientific 108 Inoculating loops and needles Disposable loops and needles molded from polypropylene can be used for sampling, serial dilutions, urine counts, and bacteriological inoculation. They are available in 1- and 10-μί loop and needle sizes. Fisher Scientific 109
Emission spectrometer Highly automated spectrometer pro vides a semiquantitative analysis rou Companies interested in a listing in this tine that rapidly analyzes an unknown sample for 30 elements. The instru department should send their releases ment reads the concentrations of directly to Environmental Science & Technology, Attn: Products, 1155 16th samples that are up to 1000 times higher than the calibration standard St., N.W., Washington, DC 20036
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Wind measurement system The speed and direction sensors in this system use dc power and transmit data back to the central display unit with a standard two-wire telephone pair in stead of the bulky special cable re quired by most systems. The device is designed for pollution control and meterological applications. Vaisala 111
Rapid-test dipsticks Plastic strips with a sealed test zone determine specific ions and compounds semiquantitatively. The test zone is immersed in the sample for 2-3 s and compared with a color scale. EM Science 107 Quadrupole GC/MS Research-grade instrument uses hy perbolic rods in the mass filter to pro vide a mass range capability of 4-1800 μιτι. It is particularly suited to analyses of higher molecular weight com pounds. Sample introduction methods include gas chromatograph, liquid chromatograph, solids sample probe, and direct evaporation probe. Finnigan MAT 104
and analyzes at a rate of 18 elements/min at short integration times or 24 elements/min with the second channel. Instrumentation Laboratory 110
Portable samplers Designed to withstand the harsh de mands of field water and wastewater sampling, these samplers have digital time control, a digital delay start timer, a digital real-time clock, and flow signal input options. A cooling system controls the temperature of the sam ples. Sample transport velocity is high, and the sample volumes are accurate within ±5 mL. Manning Technologies 112 112S monitor Measures H2S concentrations in the ppb range and above with a lead ace tate sensing method. Provides an analysis in less than 3 min and works on a continuous basis with an accuracy of less than ±2%. The method is spe cific to H2S only. Houston Atlas 113 ΗPLC column packing kit Includes a rapid-closure reservoir that keeps the packing from settling while it is in suspension. Each kit is supplied with a column assembly including fit tings, a high-pressure on/off valve, and a column packing guide. Scientific Systems 114 Need more information about any items? If so, just circle the appropriate numbers on one of the reader service cards bound into this issue and mail in the card. No stamp is necessary.
