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Ultra High Performance Alpha/Beta Counting Systems

Automatic Systems

These systems are best used when there is a very large number of samples to be counted, and the counting times are relatively short. If unattended operation is desirable, an automatic system should be appropriate if counting time per sample is relatively short in duration, typically ranging from one to two minutes for smears and air filters and up to 30 to 60 minutes for environmental and radiochemistry samples.

Manual Systems

Manual alpha/beta counting systems are used for a wide range of applications. Two major uses for a manual system stand out: when the number of samples to be counted is extremely low (5–10 samples per week); or when counting times are very long (30–60 minutes or longer).

Multi-Detector Systems

These systems are best utilized for applications requiring high sample throughput and high sensitivity.  Our MDS series can be configured to accommodate 4, 8, 12, or 16 detectors to facilitate the sample volume and throughput rate required.

About Us


Protean Instrument is a leading manufacturer of ultrahigh performance counting systems for measuring alpha/beta activity at very low environmental levels. The company was founded in 1989 by people who were the principal designers and manufacturers of the classic "dual-rail" alpha/beta and smear counting systems. Their design and manufacturing expertise is evident in the number of these classic systems still operating today.

Protean currently offers a very complete line of instruments. The current range of instruments emphasizes two uncompromising design factors that are focused on delivering the highest possible performance and the easiest maintenance in the industry.

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