Extech 407766 Sound Calibrator 94/114dB for 0.5" and 1" Microphones

Product Description This 1kHz 94/114dB professional sound calibrator is for 0.5 in. or 1 in. microphones. Calibrates and verifies sound level meter operation. Level position switch to select 94dB or 114dB with power on LED indicator light. Durable die-cast aluminum housing generates a 1kHz sine wave at 94dB/114dB to an accuracy of 5% (frequency) and ±0.5dB (94dB)/±1.0dB (114dB). Meets IEC standard 60942 1997-11. Comes complete with two 9V batteries, carrying case and screwdriver. From the Manufacturer 1kHz 94/114dB professional sound calibrator for 0.5" or 1.0" microphones calibrates and verifies sound level meter operation. Level position switch to select 94dB or 114dB with power on LED indicator light. Durable die-cast aluminum housing generates a 1kHz sine wave at 94dB/114dB to an accuracy of 5% (frequency) and ±0.5dB (94dB)/±1.0dB (114dB). Meets IEC standard 60942 1997-11and comes complete with two 9V batteries, carrying case, and screwdriver.

• Continuous and accurate readings from 5 to 99,990rpm
• Measure rpm from 5 to 99,990rpm with microprocessor quartz crystal accuracy of 0.05-percent
• Large LED display updates 1/sec (rpm<60)
• Resolution: 0.1rpm (5 to 1000rpm), 1rpm (1000 to 999rpm), 10rpm (10,000rpm to 99,990rpm)
• Unique design permits rpm measurements of a one hole gear or disk eliminating the need for special gears;