Sound Level Adapter (SL-406) For Digital Multimeters

Lutron Sound Level Adapter (SL-406) For use with a Digital Multimeter

The Lutron SL-406 Sound Adapter allows any compatible DMM set to the 200 mV DCV range to function as a professional sound level meter. Designed to meet IEC 61672 Class 2 standards, it provides accurate A-weighting measurements from 30 to 130 dB. The remote condenser microphone offers excellent stability and directional convenience, making the SL-406 suitable for environmental noise surveys, workplace safety checks, machine noise diagnostics, and general acoustic testing.

• Turns a DMM into a precision sound level meter: Requires only a 200 mV DCV range.
• Wide dynamic range: Measures 30 to 130 dB across three selectable ranges.
• A-weighting network: Designed to simulate human ear response according to IEC 61672 Class 2.
• Fast time weighting: Captures rapid sound level changes.
• High-accuracy condenser microphone: Ensures long-term stability and consistent measurements.
• Over/Under range indicator: Alerts when input exceeds selected range.
• Low battery indicator: Prevents incorrect readings due to low power.
• Ideal for industrial, commercial, and environmental sound monitoring.

Specifications

• Measurement Range: 30 to 130 dB, three ranges. Range 1: 30 to 80 dB. Range 2: 50 to 100 dB. Range 3: 80 to 130 dB.
• Output Scaling: 10 DC mV per 1 dB.
• Accuracy (A-weighting at 94 dB reference, 31.5 Hz to 8 kHz): 31.5 Hz: ± 3.5 dB. 63 Hz: ± 2.5 dB. 125 Hz: ± 2.0 dB. 250 Hz: ± 1.9 dB. 500 Hz: ± 1.9 dB. 1 kHz: ± 1.4 dB. 2 kHz: ± 2.6 dB. 4 kHz: ± 3.6 dB. 8 kHz: ± 5.6 dB.
• Frequency Weighting: A-weighting (human-ear response simulation).
• Frequency Range: 31.5 Hz to 8,000 Hz.
• Microphone Type: Electric condenser microphone.
• Microphone Size: 12.7 mm (0.5") standard diameter.
• Calibration Feature: External VR adjustment for field calibration.
• Compatible Calibrators: B & K (Bruel & Kjaer) Model 4226; SC-941 (94 dB); SC-942 (94/114 dB).
• Power Supply: One 9 V battery (006P, 6F22).
• Power Consumption: Approx. 4 mA DC.
• Operating Temperature: 0°C to 50°C (32°F to 122°F).
• Operating Humidity: Less than 80 percent RH.
• Dimensions: Main instrument: 107 × 53 × 29 mm (4.2" × 2.1" × 1.1"). Microphone probe: 12.7 mm diameter × 58 mm length (0.5" × 2.28").
• Weight: 150 g (0.33 lb) including battery.

Accessories Included

• Operation manual.

Optional Components

• 94 dB sound calibrator, Model SC-941.
• 94/114 dB sound calibrator, Model SC-942.
• Wind shield ball, Model SB-01.
• Compatible DMM models with 200 mV DCV range.