ND9B Digital Sound Level Meter Calibrator 94dB & 114dB for 1/2" and 1" inch Microphone, Professional Noise Decibel Calibration Tool Accuracy Check with Backlight CO2 It automatically calculates the total

It automatically calculates the total area & volume and takes the sum of consecutive length measurements

- Display illumination and multi-line display

With Max Hold Function

It is the most advanced and top quality rugged meter   that   uses magnetic induction and eddy current principle to measure thickness of magnetic coating on nonmagnetic base as well as nonmagnetic coating on magnetic base

ND9B Digital Sound Level Meter Calibrator 94dB & 114dB for 1/2" and 1" inch Microphone, Professional Noise Decibel Calibration Tool Accuracy Check with Backlight CO2 It automatically calculates the totalFeatures: Simple & Easy Operation Digital Display with Backlight, Clearly Shows the Chosen dB Level Lightweight and Small Size Removable 1 2" Transducer Cap, Suitable for 1" and 1 2" Microphone Size Conforms to IEC60942 (IEC942) Class 1 Standard Solid Design Provides Accurate and Reliable Performance Suitable for Personal, Field and Laboratory use Specifications: Sound Pressure Level: 94dB & 114dB Accuracy: 0. 3dB (20C, 760mm Hg) Frequency: 10000. 01%