Background radiation in OH3NWQ's study

Measurement station is located upstairs in the study. Radiation is measured as an average of each 10 minute period and graphs are updated to this server every two hours.

Severe electrical disturbances, such as thunder storms, and cosmic gamma ray bursts may show as spikes in the chart.

Link to outside and inside temperature measurements.

Time is now 15.10.2024 18:57:47z

or 15.10.2024 21:57:48 local time.

Last 7 days:

Graph_7d

Last 30 days:

Graph_30d

Last 365 days:

Graph_0.5y_1

Lisätietoa säteilyannoksista ja annosnopeuksista Säteilyturvakeskuksen sivulta.

Measured with:

- GEO-210 pancake Geiger-Müller counter probe by K0FF.

- Modified Ludlum Model 177 alarm ratemeter for supplying 900 VDC and conditioning the pulses from the probe to TTL levels.

- Version 1 used a home made 24 bit counter using a 16F84 attached to the parallel printer port and program to read the counter through the parallel port and to feed the rrd database.

- Version 2 uses a GPIO pin of a Raspberry Pi 3B to count the pulses. The RRD database is run within the Raspberry Pi. Source code

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© 2007-2019 OH3NWQ

Creative Commons Licence
Radiation Graphs by OH3NWQ is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.