Simpson's sound level meters come in two different versions to handle virtually any noise measurement requirement: the Model 884-2 with an "A" weighted scale for simple measurements and the Model 886-2 with a choice of fast or slow response and "A", "B" or "C" weighting. All three models have output jacks for connecting to a Chart Recorder. Optional calibrators are available for in-field adjustment.

• General purpose, type 2 meters for OSHA and laboratory sound measurements
• Full coverage from 40-140dB with special 85-115dB OSHA range
• "A", "B", and "C" weighted measurement options
• Rugged solid-state reliability, battery-operated
• Impact-resistant case contoured to minimize sound energy field reflections