What is it?

The RadSens board is a universal dosimeter-radiometer board for different gas-discharge Geiger-Muller counters (like SBM 20 or others). The logic of the RadSens board is based on the STM32 microcontroller. The data received from the Geiger counter is transmitted via the I2C interface. The device supports changing in the I2C address and turning off the high voltage generator (400V) to reduce power consumption. Fine-tuning of the counter sensitivity is supported.

What makes it special?

1. Support different counters

Supported Geiger-Muller counters: any with anode voltage 380 – 440 volts. Including but not limited to SBM20, J305,M4011, STS-5. Geiger-Muller counter not included in delivery set.

2. Easy counter mount and unmount

Tube (Geiger-Muller counter) could be mount on a special holders or soldered directly through holes in the board

3. Measures three parameters

As an outbound I2C package, the RadSens board generates 3 values:

• Radiation intensity (μR / h) with an averaging algorithm - for accurate measurement of radiation over a long time period (500s)
• Radiation intensity (μR / h) with algorithm with a dynamic range of calculation time - for registering local sources of pollution
• The number of registered impulses since the last request to the I2C

4. Ready to use libraries, datasheet and friendly community

The radiation sensor based on RadSens board can work both in standalone mode and as part of an external Arduino, STM, Raspberry microcontroller or as part of your own device. To run the board you can use the sketch example or our libraries on GITHUB. Also you can join our community in Telegram: ClimateGuard_Community

5. Build-in led

Measuring background radiation in a standalone mode represents the radiation level by flashing the LED. With an increase in radiation, the blinking frequency will increase proportionally and vice versa.

Hints

After plugging Geiger-Muller counter and before the first us you should set the counter sensitivity (imp / μR) via i2c interface. By default, sensitivity equals 105 imp / μR (set for SBM 20-1 counter). It could be done via ClimateGuard library for RadSens on GitHub:

#include "radSens1v2.h"

ClimateGuard_RadSens1v2 radSens(RS_DEFAULT_I2C_ADDRESS); //Constructor of the class ClimateGuard_RadSens1v2

void setup()

{

radSens.radSens_init(); // Initialization function and sensor connection. Returns false if the sensor is not connected to the I2C bus.

radSens.setSensitivity(55); //Sets the value coefficient used for calculating the radiation intensity

}

RadSens board characteristics

Connection socket