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Geiger counters SBM-20 are a steel tube filled with a special gas mixture, about 10 centimeters in length and about one centimeter in diameter.On both sides the Geiger counter SBM-20 has contacts under the socle connection.
MOST popular geiger counter!
Geiger counter SBM-20 improved model of its predecessor - counter STS-5.
DATASHEET in english INCLUDED!