Siemens Heavy Duty 600 Amp 600-Volt 3-Pole Outdoor Fusible Safety Switch with Neutral HF366NRA - The Home Depot

The TRIPLETT SLM400-KIT Sound Level Meter with Calibrator Kit can be used to test and verify sound levels for worker safety (OSHA), community noise ordinances, night clubs/concerts, airports, mines, athletic events, construction sites, vehicle testing, wind farms, new product noise reduction and other applications. The Sound Level Meter meets IEC 61672-1 type 2, ANSI S1.4 Type 2 with minus or plus 1.5 dB accuracy. It features a 35 dB to 130 dB range plus A and C weighting with selectable fast/slow response time. The calibrator fits 1/2 in. Dia microphones and has selectable 94 dB and 114 dB output with minus or plus 0.5 dB accuracy. Calibrator output frequency is minus or plus 4% at 1 kHz. The kit includes Type2 Sound Level Meter with 9-Volt battery and windscreen plus Sound Level Calibrator with 9-Volt battery and hard carrying case