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

Features:

• 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 (20°C, 760mm Hg)
• Frequency: 1000±0.01% Hz allows calibration with A,B,C or D weighting networks or linear
• Microphone Size: 1" and 1/2" microphones 
• Temperature Coefficient: 0~0.01 dB/°C
• Standard: IEC60942 (IEC942) Class 1
• Altitude Effects: Approximately decrease 0.1dB per 2000 ft increase in altitude from sea level to 12,000 ft elevation, or comparable atmospheric pressure change (approximately every 50mm of Hg decrease)
• Operating Temperature: -10~50°C
• Storage Temperature: -40~65°C(batteries removed)
• Power Supply: 2 x 1.5V AAA (excluded)
• Size: 137 x x51 x 51mm
• Weight: approx. 200g

Set Includes:

• 1 x Sound Level Calibrator
• 1 x English Manual
• Standard Package