Extech 407744 βαθμονομητή στάθμης ήχου - 94dB (ανασκόπηση)
Extech Calibrators accommodate Sound Level Meters with 0.5” and 1” microphones. The Calibrator’s die-cast aluminum housing is built for ruggedness and durability. The 407744 provides a 94dB calibration output signal …