Tenma 72-942 Sound Level Meter

Digital sound level meter with 4 digit LCD display. This is designed to meet the measurement requirements of safety engineers, health, industrial safety offices and sound quality control in various environments. 0.1dB resolution and 0.5s display update Removable windscreen 1/2" electret condenser microphone Threaded insert for tripod mount Backlight on/off, time weighting select and level range select buttons Weighting A/C-weighting select button Electrical calibration with the internal oscillator (1KHz sine wave) Powered by 9V battery (006P or 6F22 or 1604) 12-month limited warranty (view Terms & Conditions for details) Specifications: Standard Applied: IEC651 type 2, ANSI S1.4 type 2 Frequency Range: 31.5Hz to 8kHz Measuring Level Range: 30 to 130dB Resolution: 0.1dB Accuracy: ± 1.4dB (under reference conditions) Frequency Weighting: A & C Time Weighting: Fast: 125ms; Slow: 1s Level Ranges: Low: 30 ~ 100dB; High: 60 ~ 130dB Display: 4-Digit LCD Display Update: 0.5s Alarm Function: “OVER” is shown when input is out of range Maximum Hold: Hold readings the Maximum Value, with decay < 1dB / 3minutes Microphone: ½ inch electret condenser microphone Calibration: Electrical calibration with the internal oscillator (1kHz Sine Wave) Auto Power Off: Meter automatically shuts down after approx. 15minutes of inactivity Operating Temperature: 0°C to 40°C (32°F to 104°F) Operating Humidity: 10 to 90% RH Storage Temperature: -10°C to 60°C (14°F to 140°F) Storage Humidity: 10 to 75% RH Power Supply: One 9V Battery, 006P or IEC 6F22 or NEDA 1604 (Included) Battery Life: About 50hrs (Alkaline Battery)