Simpson 887 Sound Level Calibrator Freq. 1KHZ Level -114dB

General Radio Company Type 1567 Sound Level Calibrator (114dB, 1kHz)

Simpson 887-2 Sound Level Calibrator 94/114 dB

General Radio 1567 Sound Level Meter Calibrator 114dB at 1KHz

EXTECH 407745 Sound Level Calibrator 94db/114db TESTED

Simpson 889 Sound Level Calibrator - FREE SHIPPING

General Radio Permissible Sound-Level Calibrator Type 1562-A w/ Case

CEL Instruments CEL-284 Acoustic Calibrator 114 dB 1kHz + Electrical O