View largerSound Level Meter with PC Interface and Background Noise FilterSound Level Meter meets ANSI and IEC 651 Type 2 standards. Ideal for noise surveys in the workplace, installing fire alarms and speaker systems, and enforcing noise ordinances. Measures from 30 to 130 dB in two ranges and has an accuracy of ±1.5 dB. The built-in background noise absorber for machine noise measurements filters ambient noise for more accurate readings. Data hold and Min/Max functions. Backlit display allows use in dimly lit areas. The meter also has an RS232 interface for capturing data directly to your PC using optional Windows compatible software (407752). Complete with microphone windscreen, 9-volt battery, carrying case, and user manual. Model 407732-NIST is also available with a Certificate of Calibration traceable to NIST.What is a Sound Level Meter?Sound level meters are instruments designed to respond to noise much like the human ear. The measurements taken by sound level meters are compared to known standards to determine if the noise level could have a detrimental effect on human hearing.Types of Sound Level MetersType 3 — Low cost models for basic sound checks.Type 2 — Models that meet OSHA and other ordinance testing requirements.Type 1 — Precision for lab testing (Extech doesn't have one).Dosimeters — Measure work noise exposure according to OSHA.Analyzer — analyzes noise in narrow bands. More Extech Instruments to Choose FromView larger407730 Sound Level MeterRecords sound levels from 40 to 130 decibels with ±2 dB accuracy and 0.1 dB resolution. It features a large, 2000 count LCD display with a fast responding analog bargraph for viewing trend. Additional features include: Min/Max, Max Hold, Auto Power off, and an analog AC output for connection to chart recorders and dataloggers. Comes with microphone windscreen, four AAA batteries, and user manual.View larger407732 Type 2 Sound MeterSound Level Meter meets ANSI and IEC 651 Type 2 standards. Ideal for noise surveys in the workplace, installing fire alarms and speaker systems, and enforcing noise ordinances. Measures from 35 to 130 dB in two ranges and has an accuracy of ±1.5 dB. Data hold and Max hold functions. Backlit display allows use in dimly lit areas. Complete with microphone windscreen, 9-volt battery, and user manual. Model 407732-NISTL is also available with a Certificate of Calibration traceable to NIST at a single calibration point to 94 dB.View larger407732-Kit Sound Level Meter KitType 2 Sound Level Meter Kit meets ANSI and IEC 651 Type 2 standards. Ideal for noise surveys in the workplace, installing fire alarms and speaker systems, and enforcing noise ordinances. Measures from 35 to 130 dB in two ranges and has an accuracy of ±1.5 dB. Data hold and Max hold functions. Backlit display allows use in dimly lit areas. Kit comes complete with 407732 sound meter, 407744 94 dB Sound Calibrator, microphone windscreen, three 9-volt batteries, hard carrying case, and user manual. Model 407732-Kit-NIST is also available with a Certificate of Calibration traceable to NIST which includes 407732-NIST Sound Level Meter and 407722-NIST Sound Calibrator.407736 Type 2 Sound Level Meter with Calibration CheckSound Level Meter measures in 2 ranges from 35 to 130 dB with ±1.5 dB accuracy that meets ANSI and IEC Type 2 standards. It features a built-in 94 dB calibration check, fast/slow response time, A/C Weighting, Max Hold, and analog AC/DC output for connection to an analyzer or recorder. Comes complete with microphone windscreen, 9-volt battery, carrying case, and user manual. Model 407736-NIST is also available with a Certificate of Calibration traceable to NIST.