Disclosed is a transmitter device comprising a neutron detector structured to generate electrical current from neutron flux, and an oscillator circuit comprising an electrostatic switch electrically connected to the neutron detector, wherein the electrostatic switch is moveable based on the neutron detector. The transmitter device further comprises an antenna electrically connected with the electrostatic switch. The oscillator circuit is structured to pulse the antenna based on the neutron detector, wherein a period between pulses is related to the neutron flux. The antenna is structured to emit a signal corresponding to a number of characteristic values of the oscillator circuit.