Flawless... Tracerlab 4TT and 2TT scanners-complete chromatogram

systems with thin layer attachment The 4 TTscanner with thin layer attachment is a complete chromatogram scanning system. Whether you need the accurate location and assaying of low energy beta emitting radioisotopes on chromatogram paper strips, or thin layer chromatography, this system meets your needs. Features: simple operation · low background — less than 12cpm · 4 iTor2Trmode · high counting efficiency · easy access to all components — transistor circuits and

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plug-in printed circuit boards · automatic strip end sys­tem shut-off · gas flow system · automatic window or windowless scanning · holds up to 100 feet of tape or three standard glass slides · built-in collimator switching • strip or glass slide, and chart drive synchronized · electronic solvent front indicator · versatility: buy the system for either scanning mode, and convert in minutes to alternate mode through attachment purchased as required. phone your local sales office, or write direct to Waltham.

A DIVISION OF LABORATORY FOR ELECTRONICS, INC. WALTHAM 54, MASSACHUSETTS

• Film Badge Service · Health Physics · Bioassays · Sources • Nuclear Instrumentation · Radiochemicals · Radioactive Waste Disposal

• Radiation Monitoring Instrumentation · Isotope Applications

Circle No. 83 on Readers' Service Card

100 A · ANALYTICAL CHEMISTRY

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