Wohler SP 22声位计

The Wohler SP 22 Digital Sound Level Meter provides automatic or manual ranging in six measurement ranges from 30 to 130 dB. The unit meets ANSI S 1.4 and IEC 651 Type 2 standards, and features 0.1 dB resolution.
A background noise absorber permits to measure sound levels accurately even in the presence of high background noise. The meter allows you to select between fast and slow response times and A and C weighting.
A maximum hold function is provided. Jacks on the meter provide both AC and DC analog output, while a digital RS-232 interface allows you to use an optional cable to capture sound level data on a PC.