sound level meter digital unused sound range 30-100 decibels with instructions

Dawe Type 1408F Sound Level Meter – Vintage Noise / dB Tester

Dawe 1405C Sound Level Meter with battery

Bruel & Kjaer B&K Sound Level Meter 2206 for repair or parts

Parkside Sound Level Meter With High Accuracy Standard Sound Source

Vintage CEL Noise Dosimeter Model 122 with Case and Microphone - Spares/ Repair

bruel & kjaer 2307 level recorder

Dawe Stroboscope Type 1214b