The apparatus requires underground chamber at least 30 m below the surface. Our devices in Czech Republic and Slovakia are in old mines and caves, which are not open for public. It does not mean that there is prohibited area, but people visit such chambers only sometimes (once a week or month). The necessary condition is that the chamber must be without wind and temperature variations, because it is extremly sensitive for both.

Apparatus costs approximately 500 - 1000 USD and we are able to install couple of first apparatus free of charge. We will pay all costs. We suppose that if somebody will cooperate with us, we will lent him all maintance free of charge too and we will teach him, how to evaluate the prediction parameters from the data. The SW and know how for next distribution and sale will cost approximately 40,000 USD (this is approximately 1/5 of new gravimeter Scintrex, which is comparable).