Sound Level Meter (Data Logging) ( HTC – SL-1352 )

Description

HTC SL‑1352 Sound Level Meter – Advanced Noise Monitoring with Data Logging & USB Interface

The HTC SL‑1352 is a professional-grade sound level meter engineered for precision noise measurement in industrial, environmental, and occupational safety settings. Designed for safety engineers, noise consultants, researchers, production managers, and building inspectors, this meter combines high accuracy, comprehensive measurement features, and flexible data output capabilities to meet a broad range of sound monitoring requirements.

Reliable Measurement with Wide Dynamic Range

This device captures sound levels across four selectable ranges—from 30 dB to 130 dB—automatically adjusting when set to auto‑range. It accurately handles both quiet ambient noise and high-intensity industrial environments, with a measurement resolution of 0.1 dB and accuracy of around ±1.4 dB, meeting class‑2 standards under the IEC 61672‑1 specification.

Frequency & Time Weighting for Precise Analysis

Engineered to support both A‑weighting (human ear response) and C‑weighting (machine noise), the SL‑1352 offers selectable Fast (125 ms) or Slow (1 s) response modes. This flexibility enables precise measurement across diverse sound environments—from continuous industrial noise to intermittent peaks or ambient silence.

Max, Min, and Over/Under Range Indicators

The meter automatically records maximum and minimum decibel levels during measurement sessions. If sound inputs exceed or fall below the current range, on-screen “OVER” or “UNDER” alerts notify users instantly. These indicators help ensure readings remain within the instrument’s valid measurement span.

Data Logging & USB Connectivity

Equipped with built‑in data logging, the SL‑1352 can store up to 262,100 readings, ideal for extended monitoring tasks or multi-site compliance audits. A USB interface allows transfer of stored measurements to a PC using Windows-compatible software. It also provides AC output (1 Vrms) and DC output (10 mV/dB) signals for connection to frequency analyzers, recorders, or x‑y chart systems.

LCD Display & User Controls

The device features a 4‑digit LCD display with a resolution of 0.1 dB, updated at about 2 times per second, ensuring real-time feedback. The display supports clear icons for active weighting mode, response speed, battery status, and alarm or recording indications. A built-in backlight ensures visibility in low-light or indoor environments.

Alarm Function & Flexible Operation

Users can configure alarm thresholds within the sound range. If sound levels exceed or drop below preset values, visual alerts appear, and optional hardware alarms can trigger. The meter also supports a hold function to freeze readings on-screen, aiding in manual inspection and analysis.

Portable, Rugged, and Field-Ready

Despite advanced capabilities, the SL‑1352 remains compact and mobile. Measuring approximately 278 × 76 × 50 mm and weighing around 170 g, it is easy to handle and transport. Accessories include a hard carrying case, windscreen, tripod adapter, screwdriver, USB cable, and power adapter. Powered by a standard 9 V battery, it offers approximately 30 hours of continuous operation, with an auto-power-off feature to conserve energy during inactivity.

Broad Applications for Diverse Industries

This instrument is ideal for a range of professional uses:

• Industrial noise monitoring for workplace compliance

• Environmental sound surveys, including traffic, construction, and community noise

• Occupational health and safety assessments

• HVAC and building acoustics testing

• Laboratory and educational acoustic studies

• Equipment noise verification and product sound benchmarking

Its combination of data logging, statistical metrics, and fast/slow weighting support varied usage scenarios..

Key Features at a Glance

• Level range: 30–130 dB (selectable Low/Med/High or Auto)

• Accuracy: ±1.4 dB • Resolution: 0.1 dB

• Frequency range: 31.5 Hz to 8 kHz • Dynamic range: 50 dB

• Weighting: A and C • Time response: Fast (125 ms) / Slow (1 s)

• Microphone: ½‑inch electret condenser

• Display: 4 digits with backlight • Update rate: ~2 times/sec

• Functions: Max/Min, data hold, auto-range, over/under-range alerts, adjustable alarm

• Recording memory: Up to 262,100 readings • PC interface via USB

• Outputs: AC = 1 Vrms • DC = 10 mV/dB

• Power: 9 V battery • Auto off after ~15 min inactivity

• Dimension: ~278 × 76 × 50 mm • Weight: ~170 g

• Accessories included: Hard case, windscreen, tripod adapter, USB cable, power adaptor, user manual.

Benefits for Professionals

The HTC SL‑1352 delivers accurate, repeatable noise measurements with the convenience of on-device data logging and PC integration. Its statistical functions (Max/Min), flexible output options, and alarm capability support efficient compliance workflows and sound analysis. Lightweight and intuitive, it excels in environments where precision, portability, and reliability matter most.

Conclusion

With robust build quality, extensive measurement capabilities, and seamless connectivity, the HTC SL‑1352 stands out as a versatile and dependable sound level meter. Whether used for workplace safety audits, environmental surveys, or acoustic testing, it offers professionals the accuracy, flexibility, and data control needed for confident sound evaluation and regulatory compliance.