gmc-300 repository contains a set of C# classes and applications that communicates directly with Geiger counters GMC-280, GMC-300, GMC-320 connected to computer with a USB cable.
Contents
- Gmc300 class - communicates with
GMC-300Geiger counter - Gmc300HistoryParser class - parses
GMC-300Geiger counter history data - gmc300parser application - parses
GMC-300Geiger counter history data - F.A.Q.
- M4011 tube
- License
- Disclaimer
namespace Vurdalakov
{
using System;
using System.Threading;
class Program
{
static void Main(string[] args)
{
var gmc300 = new Gmc300(); // will find the device automatically
Console.WriteLine($"Geiger counter found at port '{gmc300.Port}' (baud rate {gmc300.BaudRate:N0})");
Console.WriteLine($"Model: '{gmc300.Model}'");
Console.WriteLine($"Firmware version: '{gmc300.FirmwareVersion}'");
while (true)
{
Console.WriteLine($"CPM: {gmc300.GetCpm()}");
Thread.Sleep(1000);
}
}
}
}
Use first connected device found:
var gmc300 = new Gmc300();
Use connected device by specifying port name are baud rate:
var gmc300 = new Gmc300("COM6", 57600);
var portName = gmc300.PortName;
Console.WriteLine($"Port name: '{bortName}'");
var baudRate = gmc300.BaudRate;
Console.WriteLine($"Baud rate: '{baudRate}'");
var model = gmc300.Model;
Console.WriteLine($"Model: '{model}'");
var firmwareVersion = gmc300.FirmwareVersion;
Console.WriteLine($"Firmware version: '{firmwareVersion}'");
Get counts per minute (CPM) (GETCPM)
Returns the detection rate of ionization events per minute.
Remember that this value is inaccurate during first minute of device operation.
var cpm = gmc300.GetCpm();
Console.WriteLine($"CPM: {cpm}");
To convert CPM to uSv/h, delete CPM by 151.5:
var uSvh = (float)gmc300.GetCpm() / 151.5;
Console.WriteLine($"uSv/h: {uSvh:N2}");
Note that this operation can take up to one minute.
var data = gmc300.GetHistoryData();
System.IO.File.WriteAllBytes(@"c:\temp\gmc300.dat", data);
If you get exceptions, decrease block size (default is 1024 bytes) or increase read timeout (default is 500 ms):
var data = gmc300.GetRawHistoryData(512, 1000);
System.IO.File.WriteAllBytes(@"c:\temp\gmc300.dat", data);
var serialNumber = gmc300.GetSerialNumber();
Console.WriteLine($"Serial number: '{serialNumber}'");
var volts = (float)gmc300.GetVoltage() / 10;
Console.WriteLine($"Battery voltage: {volts:N1} V");
Emulates key press of device buttons S1 to S4.
Use Gmc300Keys enum or values from 0 to 3 (represent hardware keys S1 to S4).
gmc300.SendKey(Gmc300Keys.S4); // S4 key, enter menu
gmc300.SendKey(0); // S1 key, exit menu
Emulates key press of device buttons S1 to S4.
Use Gmc300Keys enum or values from 0 to 3 (represent hardware keys S1 to S4).
gmc300.SendKeys(3, 2, 2, 2, 2, 2, 2, 3, 2, 2, 3); // enter menu and show device serial number
System.Threading.Thread.Sleep(5000); // wait 5 seconds
gmc300.SendKeys(Gmc300Keys.S1, Gmc300Keys.S1); // exit menu to main screen
gmc300.PowerOff();
gmc300.PowerOn();
gmc300.Reboot();
var dateTime = DateTime.Now;
gmc300.SetDateTime(dateTime);
var deviceDateTime = gmc300.GetDateTime();
Console.WriteLine("Device time: {0}", deviceDateTime.ToString("yyyy.MM.dd HH:mm:ss"));
namespace Vurdalakov
{
using System;
using System.Threading;
class Program
{
static void Main(string[] args)
{
var gmc300 = new Gmc300(); // will find the device automatically
Console.WriteLine($"Geiger counter '{gmc300.Model}' found at port '{gmc300.Port}' (baud rate {gmc300.BaudRate:N0})");
var historyData = gmc300.GetHistoryData();
var parser = new Gmc300HistoryParser();
parser.OnCount += (dateTime, dataType, count) => Console.WriteLine("{0} = {1} {2}", dateTime.Format("yyyy.MM.dd HH:mm:ss"), count, 1 == dataType ? "CPS" : "CPM");
parser.Read(historyData);
}
}
}
- What Geiger tube is used in GMC-300?
Both GMC-300 and GMC-320 use M4011 tube. It is possible to replace it with another tube like SBM-20.
- Do I need to install drivers?
No drivers are required for Windows 10. When connected, GMC-300 is recognized as USB2.0-Serial USB device and USB-SERIAL CH340 COM port.
Made in China. Used for both beta and gamma radiation detetion.
There is no official M4011 specification available. Below you can find information collected from various Internet sources.
Glass tube made (new) in China. Claimed to be more sensitive than the SBM-20. Although I once got high readings, it now seems similar to the SMB-20 - not too impressive, especially at it's price. It's possible this tube may be light sensitive which would explain the initial high counts but that is not confirmed by other users. It is reported that a good CPM to uSv/h conversion rate for this tube is 151.5.
https://sites.google.com/site/diygeigercounter/gm-tubes-supported
Working voltage: 380-450 V Working current: 0,015-0,02 mA Sensivity to gamma radiation: 0.1 MeV Own background: 0,2 pulses/s Working temperature range: -50...+60 С Length: 88 mm Diameter: 10 mm
Tin oxide Cathode, Coaxial cylindrical thin shell structure(Wall density 50±10cg/cm2),Application of pulse type halogen tube
application temperature:-40°C55°C
Could be used for :γRay 20mR/h120mR/h
and β Ray in range 100~1800 ChangingIndex/minutes·CM2 soft β Ray
(Both beta and gamma radiation detetion)
Working Voltage: 380-450V
Working Current: 0,015-0,02 mA
Sensivity to Gamma Radiation: 0.1 MeV
Own Background: 0,2 Pulses/s
Length: 88 mm
Diameter: 10 mm
Distributed under the terms of the MIT license.
This project is not associated with nor sponsored by GQ Electronics LLC.
All product names, logos, and brands are property of their respective owners and are cited herein for identification purposes only.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.