The Extech 407744 Calibrates and verifies Sound Level Meter operation at 94dB with a +/-0.8dB Acuracy. Fits 0.5 and 1
Specifications
Range
Accuracy
Frequency
1000 Hz
±5%
Sound Pressure Level
94 dB (407744); 94dB/114dB (407766)
±0.5dB (94dB), ±1dB (114dB)
Distortion
<2% Total Harmonic Distortion (THD)
Operating Temperature
32 to 122°F (0 to 50°C)
Power Supply
Two Heavy duty, alkaline 9V Battery
Power consumption
Approx. 10mA DC
Dimensions
2.2" diameter x 5.6" long (50 x 127mm)
Weight
0.75 lbs. (340g)
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