The CsI (Tl) crystal used in Radiation Alert® Probes has a higher atomic number, is more rugged, and less hygroscopic than a typical Nal detector. The improved gamma ray absorption allows a thinner crystal to be used, effectively reducing the background count rate.
DetectorType-CsI (Tl) crystal (Cesium Iodide Thallium)
1.0" dia x 1.0" thick (25.4 x 25.4mm)
Radiation DetectedGamma 8 keV to 3 MeV.
Typical Absorption 70% at 600 keV, 50% at 840 keV
Probe ConstructionAnodized aluminum housing. Approximate size: length 7-7.5 inches, diameter 1.5 inches. Cable (Optional)-Straight RG59/u, length 3.5 feet.
Temperature Range-25°C to 40°C (-4°F to 104°F)
Humidity Range0 to 90% Relative Humidity.
WeightApprox. 290 g (10.25 oz.) without cable
One year limited.
Accessories / None