A multi-range, ionization-chamber-based, radiation-survey meter which measures 40 cm in overall length with a 15 cm active length detector. The meter also has a support to allow it to make it self-standing. The final photo shows the end of the detector barrel, which has a rotating cover that exposes the thin aluminum window and allows the detector to be used with low-energy X-rays and/or beta radiation that would otherwise be stopped in the cover. Tracerlab introduced a series of these “Cutie Pie” radiation meters in the late 1940s. The series began with SU-1. The full-scale meter reading on this unit is 15, 150 or 1500 mR/h, depending on the range selector knob position chosen.
