The probe 6150AD-k uses a sealed proportional counter which does not require refilling or flushing from external gas reservoirs. Just like the probe 6150AD-17 it is sensitive to alpha, beta, and gamma radiation, however makes surveying larger areas much easier because of the much larger sensitive area. Moreover, it provides an electronic switch to the operating mode »alpha« where only alpha radiation is recognised and detected very sensitively because the background is much lower in this mode. A removable discriminator plate (stainless steel, 1 mm) allows to distinguish between beta and gamma radiation. The handle has an adjustable joint which can be locked to the most convenient orientation. The handle can be extended, e.g. to survey the floor comfortably in an upright position (the extension tubes are optional accessories, see below).
Analog range: 0.1 s-1 – ~80k s-1
Digital range: 0.01 s-1 – ~80k s-1