Welcome to the radmon.org shop!
Here you will find some external detectors suitable for use with RadLog and pyradmon. radmon.org is an open system, so you can take and submit readings with any compatible hardware, e.g a kit from one of the geiger kit suppliers, a compatible commercial geiger counter, a homebrew geiger counter, any geiger counter with the audio method or one of the following units.

The radmon.org radbox-20

The radbox-20 is a weatherproof external radiation background monitoring device. It contains an SBM-20 tube, sensitive to gamma radiation and hard beta particles. It is designed to be mounted on a surface outdoors, e.g in the eves or on a wall of your house. It is fed with a single 5mm diameter high quality cable that is 10m in length. This should be ample to lead through a window or other cable outlet to your PC, single board computer or other homebrew device. The radbox-20 is powered from a USB connector and the pulses are detected by plugging the 3.5mm jack into an audio or microphone input. The typical configuration is to just plug the unit into your PC via the USB and microphone or line in connectors. Windows is supported via RadLog, see the download page. Linux is supported by pyradmon.




There are two styles to choose from:
Funky - the yellow and black graphical decoration
No graphics - no label at all

The LED and internal sounder for detections can be enabled and disabled. The case is sealed with a rubber gasket and rubber washers for the case screws and the cable entry gland and LED are sealed with rubber washers.

Here is the install location for my prototype unit, it is at standing working height for easy access. The higher the unit is, the better.



There are a few different options to consider when buying the radbox-20:

All radbox-20 versions sold out. More parts coming soon. Please let me know on the forum if you are interested.

Order progress

Progress on the orders will be reported via the forum. See the 'Projects' forum and the radbox-20 thread. Please register on the forums if you order a unit. You can contact me, mw0uzo, by PM if you have any questions. :)

Shipping costs

The shipping costs are £5 for UK orders and £12 for international orders via standard airmail (no tracking, allow 2-4 weeks for delivery) or £15 for a international, tracked service. Tracking may not be available in all countries.

Live Map

Map key:
Normal Warning Alert Experiment mode Dormant radioactiveathome.org stations


radmon.org is a place for experimenters, enthusiasts and background radiation monitoring. You can send background radiation readings from a wide range of geiger counters, home built or kit built or some commercial counters. We welcome high CPM experiments, your own station news - if it interests you then it interests us! You can send data via the windows application RadLog, the python script pyradmon, by BASH script and by your own code. You can put graphs and current reading indicators on your own website. Put yourself on the live map with your own radiation monitoring station! Put yourself into experiment mode and let everyone see your data. Use your geiger counter for a useful purpose to monitor background when it is not in use. RadLog has many useful features, data sharing to other users, FTP and email functions, check it out on the Download page.

Mariete in Madrid, Spain read 100CPM on 2017-08-13 21:01:30UTC
Mariete in Madrid, Spain read 100CPM on 2017-08-13 21:01:31UTC
nu3e in Columbus, NJ read 128CPM on 2017-08-14 00:00:19UTC
Mariete in Madrid, Spain read 100CPM on 2017-08-14 10:59:42UTC
Mariete in Madrid, Spain read 100CPM on 2017-08-14 10:59:43UTC
nu3e in Columbus, NJ read 187CPM on 2017-08-14 16:52:03UTC
Mariete in Madrid, Spain read 100CPM on 2017-08-14 21:45:34UTC
Mariete in Madrid, Spain read 100CPM on 2017-08-14 21:45:35UTC
Mariete in Madrid, Spain read 100CPM on 2017-08-14 23:00:53UTC
Mariete in Madrid, Spain read 100CPM on 2017-08-14 23:00:54UTC
Mariete in Madrid, Spain read 110CPM on 2017-08-15 07:40:43UTC
Mariete in Madrid, Spain read 110CPM on 2017-08-15 07:40:44UTC
Mariete in Madrid, Spain read 100CPM on 2017-08-15 14:27:29UTC
Mariete in Madrid, Spain read 100CPM on 2017-08-15 14:27:30UTC
Mariete in Madrid, Spain read 273CPM on 2017-08-15 16:37:03UTC
Mariete in Madrid, Spain read 273CPM on 2017-08-15 16:37:06UTC
Mariete in Madrid, Spain read 110CPM on 2017-08-15 17:27:17UTC
Mariete in Madrid, Spain read 110CPM on 2017-08-15 17:27:18UTC
GandalfDerGraue in Nuremberg, Germany read 132CPM on 2017-08-15 18:54:08UTC
Mariete in Madrid, Spain read 100CPM on 2017-08-16 07:28:02UTC
Mariete in Madrid, Spain read 100CPM on 2017-08-16 07:28:04UTC
Mariete in Madrid, Spain read 100CPM on 2017-08-17 16:05:47UTC
Mariete in Madrid, Spain read 100CPM on 2017-08-17 16:05:48UTC
Mariete in Madrid, Spain read 364CPM on 2017-08-18 01:00:02UTC
Mariete in Madrid, Spain read 364CPM on 2017-08-18 01:00:03UTC
Mariete in Madrid, Spain read 110CPM on 2017-08-18 07:45:46UTC
Mariete in Madrid, Spain read 110CPM on 2017-08-18 07:45:54UTC
Mariete in Madrid, Spain read 100CPM on 2017-08-18 08:36:59UTC
Mariete in Madrid, Spain read 100CPM on 2017-08-18 08:37:00UTC
Mariete in Madrid, Spain read 100CPM on 2017-08-18 10:18:26UTC
Mariete in Madrid, Spain read 100CPM on 2017-08-18 10:18:29UTC
Mariete in Madrid, Spain read 110CPM on 2017-08-18 14:16:27UTC
Mariete in Madrid, Spain read 110CPM on 2017-08-18 14:16:28UTC
Mariete in Madrid, Spain read 100CPM on 2017-08-18 18:47:39UTC
Mariete in Madrid, Spain read 100CPM on 2017-08-18 18:47:40UTC
Mariete in Madrid, Spain read 100CPM on 2017-08-18 21:23:19UTC
Mariete in Madrid, Spain read 100CPM on 2017-08-18 21:23:20UTC
Citibroker in Risch, Switzerland read 169CPM on 2017-08-19 07:52:24UTC
Citibroker in Risch, Switzerland read 142CPM on 2017-08-19 15:34:48UTC
Citibroker in Risch, Switzerland read 290CPM on 2017-08-19 15:36:47UTC
Citibroker in Risch, Switzerland read 312CPM on 2017-08-19 15:38:47UTC
Citibroker in Risch, Switzerland read 361CPM on 2017-08-19 15:40:47UTC
Citibroker in Risch, Switzerland read 295CPM on 2017-08-19 15:42:48UTC
Citibroker in Risch, Switzerland read 246CPM on 2017-08-19 15:44:48UTC
Citibroker in Risch, Switzerland read 226CPM on 2017-08-19 15:46:48UTC
Citibroker in Risch, Switzerland read 262CPM on 2017-08-19 15:48:48UTC
Citibroker in Risch, Switzerland read 256CPM on 2017-08-19 15:50:48UTC
Citibroker in Risch, Switzerland read 246CPM on 2017-08-19 15:52:48UTC
Citibroker in Risch, Switzerland read 113CPM on 2017-08-19 15:55:48UTC
Citibroker in Risch, Switzerland read 207CPM on 2017-08-19 15:56:48UTC
Citibroker in Risch, Switzerland read 213CPM on 2017-08-19 15:58:48UTC
Citibroker in Risch, Switzerland read 134CPM on 2017-08-19 15:59:48UTC
Citibroker in Risch, Switzerland read 201CPM on 2017-08-19 16:00:48UTC
Citibroker in Risch, Switzerland read 129CPM on 2017-08-19 16:01:48UTC
Citibroker in Risch, Switzerland read 191CPM on 2017-08-19 16:02:48UTC
Citibroker in Risch, Switzerland read 153CPM on 2017-08-19 16:03:48UTC
Citibroker in Risch, Switzerland read 191CPM on 2017-08-19 16:04:48UTC
Citibroker in Risch, Switzerland read 166CPM on 2017-08-19 16:05:48UTC
Citibroker in Risch, Switzerland read 147CPM on 2017-08-19 16:06:48UTC
Citibroker in Risch, Switzerland read 177CPM on 2017-08-19 16:07:48UTC
Citibroker in Risch, Switzerland read 159CPM on 2017-08-19 16:08:48UTC
Citibroker in Risch, Switzerland read 172CPM on 2017-08-19 16:09:48UTC
Citibroker in Risch, Switzerland read 142CPM on 2017-08-19 16:10:48UTC
Citibroker in Risch, Switzerland read 179CPM on 2017-08-19 16:11:48UTC
Citibroker in Risch, Switzerland read 121CPM on 2017-08-19 16:12:48UTC
Citibroker in Risch, Switzerland read 144CPM on 2017-08-19 16:13:48UTC
Citibroker in Risch, Switzerland read 216CPM on 2017-08-19 16:15:48UTC
Citibroker in Risch, Switzerland read 117CPM on 2017-08-19 16:16:48UTC
Citibroker in Risch, Switzerland read 217CPM on 2017-08-19 16:17:48UTC
Citibroker in Risch, Switzerland read 105CPM on 2017-08-19 16:18:48UTC
Citibroker in Risch, Switzerland read 238CPM on 2017-08-19 16:19:48UTC
Citibroker in Risch, Switzerland read 106CPM on 2017-08-19 16:20:48UTC
Citibroker in Risch, Switzerland read 248CPM on 2017-08-19 16:21:48UTC
Citibroker in Risch, Switzerland read 256CPM on 2017-08-19 16:23:48UTC
Citibroker in Risch, Switzerland read 267CPM on 2017-08-19 16:25:48UTC
Citibroker in Risch, Switzerland read 288CPM on 2017-08-19 16:27:48UTC
Citibroker in Risch, Switzerland read 259CPM on 2017-08-19 16:29:48UTC
Citibroker in Risch, Switzerland read 291CPM on 2017-08-19 16:30:48UTC
Citibroker in Risch, Switzerland read 233CPM on 2017-08-19 16:31:48UTC
Citibroker in Risch, Switzerland read 276CPM on 2017-08-19 16:32:48UTC
Citibroker in Risch, Switzerland read 264CPM on 2017-08-19 16:33:48UTC
Citibroker in Risch, Switzerland read 350CPM on 2017-08-19 16:34:48UTC
Citibroker in Risch, Switzerland read 286CPM on 2017-08-19 16:35:48UTC
Citibroker in Risch, Switzerland read 328CPM on 2017-08-19 16:36:48UTC
Citibroker in Risch, Switzerland read 239CPM on 2017-08-19 16:37:48UTC
Citibroker in Risch, Switzerland read 343CPM on 2017-08-19 16:38:48UTC
Citibroker in Risch, Switzerland read 278CPM on 2017-08-19 16:39:48UTC
Citibroker in Risch, Switzerland read 322CPM on 2017-08-19 16:40:48UTC
Citibroker in Risch, Switzerland read 254CPM on 2017-08-19 16:41:48UTC
Citibroker in Risch, Switzerland read 670CPM on 2017-08-19 16:42:48UTC
Citibroker in Risch, Switzerland read 456CPM on 2017-08-19 16:43:48UTC
Citibroker in Risch, Switzerland read 120CPM on 2017-08-19 16:49:10UTC
Citibroker in Risch, Switzerland read 158CPM on 2017-08-19 16:50:10UTC
Citibroker in Risch, Switzerland read 300CPM on 2017-08-19 19:17:13UTC
Mariete in Madrid, Spain read 100CPM on 2017-08-20 05:55:40UTC
Mariete in Madrid, Spain read 100CPM on 2017-08-20 05:55:42UTC
Mariete in Madrid, Spain read 110CPM on 2017-08-20 10:46:56UTC
Mariete in Madrid, Spain read 110CPM on 2017-08-20 10:46:58UTC
Citibroker in Risch, Switzerland read 433CPM on 2017-08-20 17:09:41UTC
Citibroker in Risch, Switzerland read 347CPM on 2017-08-20 17:10:41UTC
Citibroker in Risch, Switzerland read 205CPM on 2017-08-20 17:22:41UTC
Citibroker in Risch, Switzerland read 132CPM on 2017-08-20 17:23:41UTC


Global coincident detections

No global coincidences.

Station coincident detections

No station coincidences.