Lucas CEL Instruments CEL-282 Acoustical Sound Level Calibrator

Lucas CEL Instruments Ltd. CEL-282 Acoustical Sound Level Calibrator

1 QUEST ELECTRONICS CA-32 PERMISSIBLE SOUND CALIBRATOR

CEL Instruments CEL-282, CEL- 231 Acoustic Calibrator Class 2-114 dB 1 kHz Sound

1000 Ohm 1 kOhm Ω Resistance Standard Resistor Calibrator Accuracy 0.005%

CEL Instruments Ltd. CEL-282 Acoustic Calibrator Class 2 — 114 dB, 1 kHz Sound

NASSAU INSTRUMENTS AUTO PH CALIBRATOR MODEL 2090 with probe

1 Ohm 1 Ω Resistance Standard Resistor Calibrator Accuracy 0.002%