I have a fully functional continuous radon monitor, perfect for a home inspector. If you Google Sun Nuclear Corporation, you can get full information about this unit. Depending on the state you live in, you may need annual calibration. The last time it was calibrated was July 13, 2013, which is when I bought this unit directly from Sun Nuclear. I have not used this monitor more than a few times.
The item "Sun Nuclear Professional Continuous Radon Monitor Model 102730" is in sale since Sunday, January 24, 2016. This item is in the category "Business & Industrial\MRO & Industrial Supply\Safety & Security\Radiation Detectors & Geigers". The seller is "kennyboots" and is located in Wilton, Connecticut.This item can be shipped to United States, to Canada, to United Kingdom, DK, RO, SK, BG, CZ, FI, HU, LV, LT, MT, EE, to Australia, GR, PT, CY, SI, to Japan, to China, SE, KR, ID, to Taiwan, TH, to Belgium, to France, to Hong Kong, to Ireland, to Netherlands, PL, to Spain, to Italy, to Germany, to Austria, IL, to Mexico, to New Zealand, SG, to Switzerland, NO, SA, UA, AE, QA, KW, BH, HR, MY, CL, CO, CR, DO, PA, TT, GT, SV, HN, JM.