Adastra Analogue Sound Level Meter 40 to 120dB Vintage 1970's EB5K5-1 | Rich Electronics
Analog Sound Meter - U40182 - Extech - 407730 - Sound - 3B Scientific
All-sun Em2246 Modern Analog Sound Level Meter 50 To 126db In 7 Ranges Audio Signal Output Jack Instrument Battery Tester - Speed Measuring Instruments - AliExpress