Musktool- IEC 61672 class 2 SOUND LEVEL METERSL-4001
| The SL-4001 Sound Level Meter provides accurate and reliable measurements of sound pressure levels, making it an essential tool for various industrial, environmental, and audio applications. | 
| Exceptional Features of the SL-4001: 
 1. Large LCD Display: Features a large, easy-to-read LCD display that ensures clear read-outs even in bright ambient light conditions, consuming low power for efficient operation. 
 2. Max Hold Function: Stores the maximum value on the display, allowing users to capture peak sound levels effectively. 
 3. Frequency Weighting Networks: Conforms to IEC 61672 Class 2 standards with A & C weighting networks, making it suitable for a wide range of sound measurement applications. 
 4. Time Weighting Modes: Offers Fast (125 ms) and Slow (1 second) dynamic characteristic modes, enabling users to select the appropriate response time for their measurements. 
 5. Versatile Output Options:Provides both AC and DC output for system expansion, facilitating connection with analyzers, level recorders, and tape recorders. | 
Technical Specifications:
| - Display: - Type: LCD (Liquid Crystal Display) - Size: 18 mm (0.7 inch), 3 1/2 digits 
 - Measurement Functions: - Sound Pressure Level (SPL): - Range: 30 to 130 dB (input signal only) - Resolution: 0.1 dB - Accuracy: Frequency weighting meets IEC 61672-1-2013 Class 2 standards - 31.5 Hz: ±3.0 dB - 63 Hz: ±2.0 dB - 125 Hz: ±1.5 dB - 250 Hz: ±1.5 dB - 500 Hz: ±1.5 dB - 1 kHz: ±1.0 dB - 2 kHz: ±2.0 dB - 4 kHz: ±3.0 dB - 8 kHz: ±5.0 dB 
 - Frequency Weighting Network: - A weighting: Simulates the human ear response, typically used for environmental sound level measurements. - C weighting: Provides a near-flat response, suitable for measuring machinery noise and sound pressure levels. 
 - Frequency Range: 31.5 Hz to 8,000 Hz 
 - Calibration: - Built-in adjustment VR for easy calibration using a screw driver. - Internal oscillation system with a 1 kHz sine wave generator. - Compatible with B & K (Bruel & Kjaer) Model 4226 multifunction acoustic calibrator. 
 - Microphone Type: Electric condenser microphone (1/2 inch standard size) 
 - Range Selector: - 30 to 80 dB - 50 to 100 dB - 80 to 130 dB - Over and under range indication. 
 - Output Signal: - AC output: 0.5 Vrms corresponding to each range step. - DC output: 0.3 to 1.3 VDC, 10 mV per dB. - Output impedance: 600 ohm. - Output terminal: 3.5 mm phone output terminal. 
 - Power Supply: 006P DC 9V battery (heavy duty type) 
 - Power Consumption: Approx. DC 9.5 mA 
 - Operating Environment: - Temperature: 0 to 50℃ - Humidity: Less than 80% RH 
 - Dimensions: 245 x 80 x 35 mm (9.6 x 3.2 x 1.4 inches) 
 - Weight: 220 g (0.48 lb) without battery 
 Accessories Included: 
 - Instruction Manual: 1 PC - Calibration Screw Driver: 1 PC 
 Optional Accessories: 
 - 94 dB Sound Calibrator, Model: SC-941 - 94 dB/114 dB Sound Calibrator, Model: SC-942 - Hard Carrying Case, Model: CA-06 
 Advanced Features: 
 - Microprocessor Circuit: Ensures high accuracy and reliability with special functions. - Durable Design: Features a strong, lightweight ABS plastic housing for long-lasting use. - One-Hand Operation: Small and lightweight design allows for convenient one-hand operation. - Low Battery Indicator: Alerts users when the battery is low, ensuring continuous operation. 
 Applications: 
 - Environmental Monitoring: Measure sound pressure levels for environmental noise assessments. - Industrial Maintenance: Monitor noise levels in industrial settings to ensure compliance with safety standards. - Audio Testing: Evaluate sound levels for audio equipment testing and calibration. 
 Invest in the SL-4001 Sound Level Meter for precise and reliable sound pressure level measurements, ensuring high performance and versatility in various industrial, environmental, and audio applications. | 
Specifications
| Circuit | / | 
| Display | 18mm (0.7") LCD (Liquid Crystal Display), 3 1/2 digits. | 
| Measurement Range | 3 ranges, 30 to 130 dB, input signal only. | 
| Resolution | 0.1 dB. | 
| Function | dB (A & C frequency weighting), Time weighting(Fast, Slow), Max. hold, AC & DC output. | 
| Accuracy | Frequency weighting meet IEC 61672-1-2013 class 2, calibrating input signal on 94 dB(31.5 Hz to 8 | 
| Frequency Weighting Network | Characteristics of A & C. | 
| Data hold | / | 
| Peak hold | / | 
| Time weighting | Fast - t= 125 ms, Slow - t = 1 sec., | 
| Range selector | 30 to 80 dB, 50 to 100 dB, 80 to 130 dB, 50 dB on each step, | 
| Frequency | 31.5 Hz to 8,000 Hz. | 
| Microphone type | Electric condenser microphone. | 
| Microphone size | 1/2 inch standard size. | 
| Calibration VR | / | 
| Calibrator | B & K (Bruel & kjaer), multi-fuction acoustic calibrator, model : 4226. | 
| Datalogger Sampling Time Setting range | / | 
| Memory Card | / | 
| Advanced setting | / | 
| Over Indication | / | 
| Data Hold | / | 
| Memory Recall | / | 
| Sampling Time of Display | / | 
| Data Output | / | 
| AC output | / | 
| Power off | / | 
| Operating Temperature | 0 ℃ to 50 ℃ ( 32 ℉ to 122 ℉ ). | 
| Operating Humidity | Less than 80% RH | 
| Power Supply | 006P DC 9V battery(heavy duty type). | 
| Power Current | / | 
| Weight | 220 g/0.48 LBS (without battery). | 
| Dimension | 245 x 80 x 35 mm ( 9.6 x 3.2 x 1.4 inch). | 
| Accessories Included | / | 
| Optional Accessories | 94 dB Sound Calibrator, Model : SC-941. | 
 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
                 
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