A little over 15 years ago when I began consulting for the Ohio State Univ. College of Engineering at the Nuclear Reactor Lab I obtained my own dosimeter. The US Nuclear Regulatory Commission requires employers to track employees' radiation exposure. Since I was a consultant, I was the employer. The University could have provided me with dosimetry, but I sometimes did work for other organizations. I obtained a MiniDose dosimeter from RAE. This device used a small CsI crystal and likely a SiPM as the entire device was small, powered by a single AAA battery. Battery life was quite good. The dosimeter maintained a cumulative record of exposure, but the user could alter some settings (e.g., alarm setpoints, etc.). Periodically I would upload the exposure history to my computer for permanent record keeping. The dosimeter came with a calibration and a period after which one would need to have the unit re-calibrated. I still have the dosimeter; it still works, but the calibration certificate has long expired. As I am retired, it does not matter about calibration. As I recall the price of this device was around $350 some 15 years back. Thus, the price for the Atom Swift device seems quite good. I don't know if such a device would meet the US NRC criterion as a personal dosimeter.
Links to the RAE miniDose dosimeter follow -
https://www.equipcoservices.com/pdf/dat ... nidose.pdf
https://gastech.com/sites/default/files ... hure_0.pdf
In the nuclear lab classes that I taught at the OSU Nuclear Reactor I would require students to use an electronic dosimeter for the duration of the lab. The devices that were used came from Ludlum and Canberra. These devices did not maintain a permanent record of exposure, just of the particular period, until reset. At the start of each lab students would sign in on the board at the front of the class room and identify the date and starting dosimeter exposure (zero if the unit had recently been reset). At the end of the lab the dosimeter exposure would be recorded with the delta exposure shown. The exposures were always very low (less than 2 mrem or mR - depending on dosimeter used). I would photograph the board at the end of each lab as my record (meaning CYA). These dosimeters used small energy compensated GM tubes. The GM tubes would not survive a drop onto a
hard surface (concrete floor). I purchased a number of small GM tubes from LND and we repaired damaged dosimeters. Fortunately at the time a calibration lab was adjacent to the nuclear reactor lab and we could verify the functionality of repaired dosimeters.
