Assembled and
soldered newest third edition of MyGeiger PRO DIY Radiometer kit
The lot comes without Geiger Tube and without battery, if you want to add it please contact me.
We introduce the newest
edition of MyGeiger ver. 3 PRO for measuring gamma radiation
dose-rate and for precision average CPS counting. Version 3 was designed
for high count rate applications where you need counter stability,
performance on HV voltage output and software options for precision
measurements of radiation samples. This device can be used for portable
field measurements, laboratory application or for online monitoring
station.
The device was build for
enthusiasts, a physics students, teachers and researchers engages in radiation
study. It fit hobby projects as well as environment or laboratory test.
MyGeiger ver.3. PRO is compatible with wide range of 400V and 500V Geiger
tubes; it has flexible options for calibration that allows you to adjust your
counter for different GM tubes. The kit has re-designed efficient high
voltage with enlarged output power, faster microprocessor with updated and
enhanced software, setup menu, USB CPM / CPS logging, faster lithium charger,
reduced power consumption, power safe sleep mode and comfortable controls. Now
it got the ability to operate in radiation field higher than 1500uSv/h with
SBM-20 where tube is operate at the maximum possible count rate.
Have any question or need help to download PDF manual? You are welcome to contact me!
Technical specifications:
Package include:
The device has two working
modes: Gamma Dose Rate Meter and Average CPS counter.
Gamma Dose Ratemeter: the default Radiometer working mode is starting when power is
applied. The software will calculate the ambient gamma radiation dose rate DER
in uSv/h or mSv/h units. New measurement cycle initialized when radiation level
changed rapidly. For better accuracy of the measurements please wait until
estimation symbol will disappear from the LCD.
The software has option for
dose rate correction based on tube dead time settings. The correction is
noticeable only on very high count rate. You can disable that function in menu
if the correction is not required.
Average CPS Counter: average CPS counter mode is intended for precision calculation of
counts per second rate from radioactive samples, checking surface contamination
and working with externally connected scintillation probes. You can set desired
averaging period in calibration menu.
USB Logging: The device has built-in USB for logging. The USB port has adjustable
UART speed. You can log to computer CPM (counts per minute) or CPS (counts per
second). Please check and download our freeware COM port terminal
software "Radiation Logger" for CPM logging and online monitoring.
Geiger Tube compatibility: The counter electronics and software is compatible with many popular
GM tubes, such as 400V and 500V tubes. You can use SBM-20, STS-5, Gamma 7C,
Beta-1 and Beta-2, LND-712, LND-7317, SBT-9, SBT-11, SI29BG, Vacutec 70019A and
more.
Comfortable Buttons: MyGeiger 3 is designed with 2 comfortable big tact switches for
controlling the software, toggling LCD backlight and mute beeper function.
NEW!!! You can download STL files to print enclosure on 3D printer in THINGIVERSE.
Search thing # 2279274
Search thing # 4459946 (for round buttons, Thanks to Marc!)
Search thing # 4202730
Calibration Menu with
hints. Simple system menu will allow
you to setup your ratemeter easily. The menu has following functions:
SET CONVERSION: can be set from 0.7 – 9.0 CPS to 1 uSv/h. Use Geiger tube datasheet
to determine the correct value for your tube. The conversion factor is usable
only for Gamma radiation.
SET ALERT LEVEL: audible alarm for gamma radiation dose rate can be set from 1 uSv/h
up to 200 uSv/h
SET DEAD TIME: can be set from 10uS up to 250uS. Please use Geiger tube datasheet or
oscilloscope to determine the correct value for your tube. If the function is
not required set dead time to zero.
SET SLEEP TIMER: timer for automatically power off. Can be set from 10 minutes up to 4
hours. Set to zero to disable the function.
SET SAMPLE TIMER: timer for Average CPS mode. Can be set from 5 minutes up to 60
minutes. Set to zero for Average CPS mode without fixed timer.
SET UART SPEED: default and recommended is 9600 baud. You can select 2400/4800/9600
USE EXTERNAL PROBE: Set to NO if you are using Geiger tube connected to the board. Set to
YES if you are using external scintillation probe driver or external Geiger
tube driver. If YES is selected then internal High Voltage block will be turned
OFF and only external tube can be active. Because HV capacitors are charged
during device initialization, the high voltage can still be presented on the
board, be careful!
SET DOSE RATIO: the ratio of dose rate to estimated dose rate. It defines how the
software can react to dose-rate leap. Useful mostly when leap is high. The
ratio can be set from 3 to 20. Recommended value for SBM-20 is
6.
SET TO DEFAULT: restore all settings to default SBM-20 and reset the micro-processor
SAVE SETTINGS: You just need to confirm you want to safe changes and exit the menu.
High Voltage Converter: MyGeiger ver. 3 PRO high voltage output can be set with jumper for
420V or for 500V tube. The step-up converter is efficient on background and it
able to supply 50uA to 500V output (10M resistive load). On ambient background
radiation the HV circuit consumes from 0.1mA to 0.3mA. The HV converter is
independent from microprocessor but it can be switched On/Off by software settings.
The graph below is represent HV regulation during high activity source load on
tube. The HV
stabilization result in test is 420V +/- 5%
Fast lithium battery charger: the PCB has intelligent lithium charger IC with overcharging
protection. You can charge battery with 5V USB wall adapter or computer. In
addition, the software monitors battery level and, if it falls below 3.0V, then
the software will force automatic sleep mode with lowest power consumption to
prevent battery deep discharge.
Power saving sleep mode: MyGeiger ver. 3 PRO has power saving sleep mode for Gamma Ratemeter.
You can turn off the device with long pressing on left button. You also can set
automatic power off timer in calibration menu.
Our product is assembled with
high quality electronic components and it has professionally tested PCB board
with installed SMD parts. The product build
with original electronic components supplied by DigiKey and others reputable
sources, we do not use low cost outlet components.
We'll use the best shipping method availiable to your destination, however some areas and some countries now will take much longer to receive international mail. Please allow longer delivery time than usually and conact me prior buying if you want to change delivery method to DHL Express (recommended).