Vintage Precision Model 111B retailer Scintillator Radiation Detector

Product Name: Vintage Precision Model 111B retailer Scintillator Radiation Detector
Rare Vintage piece. retailer Need gone, please make an offer and feel free to ask any questions. 1952, PRI introduced the Model 111 Standard “Scintillator”. The pistol grip type is for uranium prospecting by hand or car borne. The detector was a 1” x 1” sodium iodide crystal. It was 100 times as sensitive as a Geiger counter. It was suitable for aerial surveys or surveys from moving vehicles. It uses a circuit designed by PRI for the US Government. The photomultiplier tube is magnetically shielded. It has two controls and a long battery life. It used four 1.5-volt flashlight cells, two 22.5 and two 67.5 volt batteries. It was waterproof and tropicalized. The ranges were 0.025, 0.05, 0.25, 1, 5, and 25 mR/h. The battery box is 3” x 4.5” x 5.25” and weighs 4 lbs. The probe is 3” x 13.5” and weighs 2 lbs. The counting rate in a 1 mR/h field is 115,000 counts per minute. The battery box can be attached to the belt with an extension cord to the pistol type counter. It sold for $495 in 1953.