PRODUCTS Wastewater sampler Specifically designed for toxic materials, the portable unit can collect up to 24 discrete samples in 350-mL glass or I-L polypropylene bottles. Samples are collected by a peristaltic pump at a rate of up to 3000 mL/min. Features include an eight-position multiplexer, a six-digit program-status LED display, a I-999-min timer, and a pushbutton sample-volume switch. ISCQ
Semimicro pH electrodes Electrodes have an outer diameter of 6 mm. Glass and epoxy bodies are available; both have sealed gel-filled references that never require refilling. The epoxy-body design has a recessed bulb to prevent breakage. Sensorex 101
Analog scanner Ten-channel unit multiplexes mixed inputs from thermocouples and highand low-level voltages and currents. Signals are referenced, amplified, and filtered; individual channel sites are provided on-board for voltage dividers and current shunts, enabling the unit to receive full-scale ranges from millivolts to volts and microamps to amps. San Diego Instrument Laboratory 102
High-performance HPLC pump Compatible with most high-pressure liquid chromatography systems, the pump delivers 0-10 mL/min at pres103 sures up to 6000 psi. Tracor Integrator for GC and LC Computations include recalibration and analysis using internal or external standard methods. Up to 30 programs and calibration tables can be designated. Automatic synchronization is provided by external event relays and the remote-start feature of the integrator. An optional memory-protection unit makes the unit capable of surviving a power failure. recovering. and continuing to Process samples in unattended operation. Columbia Scientific Industries 104 ~
Need more information about any items? Ifso. just circle the appropriate number3 on one of the reader service cardsboundinto this issue andmailin the card. No stamp is necessary.
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UV/vis spectrophotometer Digitally adjustable wavelengths of 190-600 nm are provided for quantitative monitoring of column effluents. Features include a deuterium light source, a holographic monochromator, two-flow cuvette assemblies (one sample and one reference), two airreference aperture blocks, recorder cable, event marker cable, and assorted accessory fittings for connection to plastic or stainless-steel tubing. Flow cells are available for LC applications. 105 Gilson Medical Electronics
Groundwater flowmeters Direction and speed of groundwa.er movement are displayed numerically. Probes for placement in saturated soil and in monitoring wells are available. Flow rates are indicated within three minutes; range is 1 in.-100 ft/d. K-V Associates 119
Safety bottle cover Jacket fits over gallon glass bottles to reduce breakage and contain spills of hazardous liquids. The jacket is reusable and does not interfere with pouring or take up extra shelf space. Burdick & Jackson Laboratories 106 Automated atomic absorption Either of two atomic absorption spectroohotometers mav be combined with a programmable sample changer to make a fully automated system. The spectrophotometers include an eightbit microcomputer for data collection, system management, and direct readof sample metal concentrations. The nebulizer has a platinum-iridium capillary and a stainless-steel venturi. The sample changer can be keyboard-programmed to take multiple readings and to rinse at selected frequencies. It has a capacity for 67 samples, five standards, and a blank. 107 Varian
cOmpnje inrerSr&jna ,;sling;n[his department shouidsend their releases directly 10 Enl;ironmenta/ science & Technology, Attn: Products, I 155 16th St., N.W., Washington, D.C. 20036
Gas sample bags Five-layer construction, sandwiching aluminum foil, prevents permeation into or out of bag. Capacities of up to 170 L are offered. The manufacturer will provide a free 500-mL sample bag to professionals. Calibrated Instrumerits
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GC integrator Mole-percent concentration of the components of a mixture are calculated. Peak-width resolution, peak size, sensitivity, and other operating factors are under program control. Automatic calibration and baseline correction are performed by the integrator as well. Columbia Scientific Industries 121 Volume 15. Number 3. March 1981 275
