GGLABS GRAD
Ultra low power dual tube Geiger-Muller counter shield for Arduino. Uses common SBM-20, STS-5 and J305 tubes.
Other 400V tubes can also be used, but mechanical fit might not be perfect.
Consumes less than 0.1mA @ 5V. The double tube feature can be used to increase the sensitivity (by using two tubes of the same type), to increase the range by using tubes with different sensitivities.

Simple interfacing to Arduino. Uses only 2 pins and power. Open source design.
Open source SW for a complete USB logger is available for download.


Geiger tube(s) and Arduino are not included in the listing.
We recommend SBM-20 or J305 tubes and Arduino Uno.
The board is also available with preinstalled and tested J305 tubes at this listing

WARNING
This is not a toy. While operating the circuit contains potentially lethal voltages.


Designed and assembled in USA with all new components.
Documentation and support available at gglabs.us

1 year warranty and 30 days money back (less shipping cost) if not satisfied


I will combine shipping for multiple items orders. Please request an invoice before submitting the payment.
International buyers are welcome.

Shipping MethodTrackingEstimated Delivery Refund/resend After
First class (USA) Good 3-10 days3 weeks
Priority Mail (USA) Very Good 2-5 days2 weeks
Priority Mail Express (USA) Excellent 2-3 days1 week
International Standard/First Class Poor 2-6 weeks8 weeks
International Priority Mail Poor 1-3weeks6 weeks
UPS/DHL International Express Excellent 3-5 days2 weeks