AddTools Portable Digital Sound Level Meter with A/C Weighting - 30-130 dBA/dBC

The AddTools digital sound level meter accurately measures noise levels in workshops, offices, rooms, industrial environments, and residential spaces. Its measuring range of 30 to 130 dBA and 35 to 130 dBC makes it suitable for checking ambient noise, evaluating equipment, and comparing sound levels in different environments.

This sound level meter offers A and C frequency weighting to match the type of noise being analyzed. Fast and slow time response settings make it easy to monitor both sudden sound changes and more stable noise levels, while the maximum hold function keeps the highest recorded reading visible.

Its 4-digit display, 0.1 dB resolution, and bar graph provide clear monitoring of sound variations. AC and DC outputs allow connection to compatible recording or analysis equipment. Designed to meet IEC 651 Type 2 and ANSI S1.4 Type 2 standards, this portable sound level meter is a dependable choice for professional and everyday acoustic measurements.

Features:

• Measures sound levels from 30 to 130 dBA and 35 to 130 dBC
• A and C frequency weighting for different noise types
• Fast and slow time response settings
• ±1.5 dB accuracy under reference conditions
• 0.1 dB resolution for detailed readings
• Maximum-hold function
• Automatic or manual range selection
• 4-digit display with bar graph
• AC and DC outputs for compatible equipment
• Over-range and under-range indication
• 1/2 in electret condenser microphone
• Approximately 30 hours of battery life
• 3.5 mm audio output cable and carrying case included

Specifications:

• A-weighted measuring range: 30 to 130 dBA
• C-weighted measuring range: 35 to 130 dBC
• Accuracy: ±1.5 dB under reference conditions
• Frequency range: 31.5 Hz to 8 kHz
• Level ranges: 30 to 80 dB / 50 to 100 dB / 60 to 110 dB / 80 to 130 dB / 30 to 130 dB
• Frequency weighting: A and C
• Time weighting: Fast and slow
• Display: 4-digit digital display
• Resolution: 0.1 dB
• Sampling rate: 2 readings per second
• Bar graph: 0 to 30 dB
• AC output: 0.707 Vrms at full scale, approximately 600 O output impedance
• DC output: 10 mV/dB, approximately 100 O output impedance
• Microphone: 1/2 in electret condenser microphone
• Maximum hold: Yes
• Self-calibration time: 3 seconds
• Operating temperature: 32 to 104 °F (0 to 40 °C)
• Operating humidity: 10 to 80% RH
• Storage temperature: 14 to 140 °F (-10 to 60 °C)
• Storage humidity: 10 to 70% RH
• Dimensions: 8.15 x 2.76 x 1.14 in (20.7 x 7 x 2.9 cm)
• Weight: 8.11 oz (230 g), including battery
• Power supply: 1 x 9 V battery
• Battery life: Approximately 30 hours with an alkaline battery
• Standards: IEC 651 Type 2 and ANSI S1.4 Type 2

Included in the box:

• Digital sound level meter
• Foam windscreen
• 3.5 mm audio output cable with bare wires
• Plastic carrying case
• 9 V battery
• Instruction manual