SL720 Sound Level Meter 30–130dB | Portable Decibel Monitor

$89.26 $109.75

SL720 Series Portable Sound Level Meter — Accurate Decibel Monitoring Anywhere

The SL720 Series Sound Level Meter is a professional-grade, portable sonometer designed for accurate audio measurement across a wide 30–130 dB range. Whether you're monitoring workplace environments, checking home acoustics, evaluating equipment noise, or conducting field inspections, the SL720 series delivers reliable, real-time decibel readings with a frequency response of 31.5 Hz to 8 kHz. Available in three variants — SL720, SL720A, and SL720B — each model is tailored to different measurement needs and feature requirements.

Made in Mainland China.

Choose Your Model

SL720 — Core Sound Level Meter

Measurement Range: 30–130 dB
Accuracy: ±2.0 dB
Frequency Response: 31.5 Hz – 8 kHz
Dynamic Modes: FAST & SLOW reaction speed
Weighting: A/C dual weighted measurement
Max Value Hold
Power: 2 × 1.5V AAA batteries (not included)
Working Conditions: 0–40°C, 10–70% RH
Storage: -10–60°C, 10–70% RH

SL720A — Advanced Data Logger

Measurement Range: 30–130 dB
Accuracy: ±2.0 dB
Frequency Response: 31.5 Hz – 8 kHz
Sampling Rate: SLOW 1000 ms / FAST 125 ms
Max/Min Record & Data Hold
Auto-Shutdown & Low Battery Indicator
Power: 3 × 1.5V AAA batteries (not included)
Working Conditions: 0–40°C, ≤80% RH
Storage: -20–60°C, ≤75% RH

SL720B — Pro Model with Bluetooth

Measurement Range: 30–130 dB
Accuracy: ±1.5 dB (enhanced precision)
Frequency Response: 31.5 Hz – 8 kHz
Sampling Rate: SLOW 1000 ms / FAST 125 ms
Features: Auto Range, Fast/Slow adjustable, A/C weighting, Unit conversion, Data retention, Max/Min value, Bluetooth communication
Power: 3 × 1.5V AAA batteries (not included)
Working Conditions: 0–40°C, ≤80% RH
Storage: -20–60°C, ≤80% RH

Key Benefits at a Glance

✅ Wide Measurement Range — Captures everything from near-silent environments (30 dB) to very loud machinery (130 dB)
✅ Portable & Handheld — Compact design makes it easy to carry and use on the go
✅ A/C Weighting — Supports both A-weighted and C-weighted measurements for versatile applications
✅ Data Hold Function — Lock readings on screen for easy recording
✅ Fast & Slow Sampling — Selectable response speed to match your measurement scenario
✅ Bluetooth (SL720B) — Wirelessly transmit data to your smartphone or PC

Related Products You May Like

Learn more: OSHA guidance on hand and power tools

Frequently Asked Questions

Q: What is the difference between the SL720, SL720A, and SL720B sound level meters?

A: All three models share the same 30–130 dB measurement range and 31.5 Hz–8 kHz frequency response. The SL720 is the entry-level model with basic A/C weighting and max hold. The SL720A adds Max/Min recording, auto-shutdown, a low battery indicator, and dual sampling rates (125 ms / 1000 ms). The SL720B is the most advanced, offering improved ±1.5 dB accuracy, auto range, unit conversion, data retention, and Bluetooth connectivity for wireless data transfer.

Q: Does the SL720 series come with batteries included?

A: No, batteries are not included. The SL720 requires 2 × 1.5V AAA batteries, while the SL720A and SL720B each require 3 × 1.5V AAA batteries. Standard AAA batteries are widely available.

Q: What are typical use cases for the SL720 portable sound level meter?

A: The SL720 series is well-suited for a wide variety of applications including workplace acoustic assessments, HVAC and machinery noise monitoring, home theater or studio setup, school and office environment checks, and general field measurements. Its portable design and broad decibel range make it a versatile tool for both professionals and enthusiasts.

Q: Can the SL720B transfer data to a computer or smartphone?

A: Yes! The SL720B features built-in Bluetooth communication, allowing you to wirelessly transmit real-time decibel readings to a compatible smartphone or PC app for logging, analysis, or reporting.