Eastwest engineering & electronics co. Manufactures the sound level meter model no. Sl - 4001. It uses condenser microphone for high accuracy and stability. An extra analog output signal can be used for control, data-analysis and recording. These are vastly used in audio system testing, heating and air-conditioning, work place sound level testing, and highway environmental impact.
Features:
30-130 db in 3 ranges
0.1 db resolution
94.0 db calibration built-in
Max hold; 0.7 db accuracy
Size: 8" x 3.2" x 1.4"; wt. 10 oz.
