AMETEK AC-1 Acoustical Calibrator

Du Pont Company Operating Manual Acoustical Calibrator Model AC-1 1982

Dupont AC-1 Acoustical Calibrator

3M Quest QC-10 AC300 Acoustic Calibrator ADAPTER 53-884 NoisePro, DL, DLX

Quest QC-10 AC300 Acoustic Calibrator ADAPTER 056-989 M15 Q-200 Q-300 DOSIMETER

Scott Instrument Laboratories Type 457 ACOUSTIC CALIBRATOR 106dB 1000Hz

TSCM Leader Signal Level Meter # LFC-945 - Not Tested

Mounting bracket for NTI XL3 Sound Level Meter. Mount inside encloure or on wall