Geiger Counter, Versatile, easy to use and compact precision instrument for measuring alpha-, beta- and gamma-radiation. Filter selection switch at the front of the Geiger-Muller counter tube for filtering out types of radiation
ultrasonic Probe, Dimensions: 65 mm X 27 mm Dia, For Use With ultrasonic Echoscope, Includes A 16-mm Piezo-Ceramic Disc In A Die-Cast Metal Case And A 1-M Long Cable With A Frequency-Coded Snap-In Plug, Equipment Is Adapted To Sound In Water/Acrylic, 1 Mhz.