Sound Level Meter SL 400 Class 2 Trotec - 32,700 Values

Sound Level Meter SL 400 - TROTEC

The SL400 is a class 2 precision sound level meter supplied with an ISO calibration certificate. It is an essential tool for noise measurement and monitoring in professional or outdoor environments.

Compact and lightweight, this device is designed for safety officers, acoustic technicians, and quality control services.

Reliable and versatile measurements

Thanks to its frequency evaluation according to A and C weighting curves, the SL400 analyzes both human perception of sounds and low-frequency components. It offers a choice of measurement speeds: slow (1 second) for stable noise, or fast (125 milliseconds) for sound variations. Its backlit 4-digit display, complemented by a bargraph, remains perfectly readable in all conditions.

Integrated data logger

The SL400's internal memory can store up to 32,700 values. This data can be easily transferred via USB and processed using the supplied software. This software enables real-time monitoring (Live Log), graphical or tabular visualization, Excel export, and even printing in X-Y diagram format.

Extended use options

The SL400 operates on both batteries and mains power, making it suitable for long-term measurements. Its integrated tripod thread facilitates continuous recordings. It also features a 3.5 mm jack socket allowing connection to X-Y recorders or frequency analyzers.

Typical applications

Workplace safety: control of noise exposure at workstations.

Environment: monitoring of urban or industrial noise pollution.

Quality control: identification of noisy areas within the company.

Hearing protection: verification and selection of suitable protection.

Regulation: compliance with sound level standards.

HVAC technology: control of heating and ventilation installations.

Practical advantages of the SL400

Class 2 precision with ISO certificate.

A and C weighting for complete analysis.

Internal memory: 32,700 recordings.

Fast/slow evaluation switchable.

Max., min., Hold and alarm functions.

Backlit screen with integrated bargraph.

USB connection and 3.5 mm jack output.

Analysis software included (Live Log, graph, Excel).

¼ inch thread for tripod mounting.

Automatic shutdown to save energy.

About the Trotec brand

Trotec specializes in the manufacturing and distribution of air treatment and precision measurement equipment. Recognized for its innovation and "Made in Germany" quality, Trotec offers a complete range of products including dehumidifiers, humidifiers, environmental measurement devices, and much more, designed to meet the needs of professionals and individuals. With a focus on sustainability, energy efficiency, and performance, Trotec is committed to providing reliable and effective solutions to improve air quality and comfort in various living and working spaces.

SL 400 Sound Level Meter – Professional precision for your acoustic measurements

Technical specifications:

Measurement performance
Measurement range: 30 dB to 130 dB
Accuracy: ±1.4 dB (Class 2 according to DIN EN 61672)
Resolution: 0.1 dB
Frequency range: 31.5 Hz to 8 kHz
Dynamic range: 50 dB

Available measurement ranges
• 30 dB to 80 dB
• 50 dB to 100 dB
• 80 dB to 130 dB
• 30 dB to 130 dB

Operation and display
Display response time: 500 ms
Fast sampling (FAST): 125 ms
Slow sampling (SLOW): 1 s
Auto power off: after approximately 15 min of inactivity

Integrated alarm system
• OVER (high): indication when measurement range is exceeded
• UNDER (low): alert when measurement range is not reached

Microphone
1/2 inch electret microphone

Power supply
9 V block battery

Operating conditions
Operating temperature: 0 °C to 40 °C
Relative humidity: 10 % to 90 % RH

Storage conditions
Temperature: -10 °C to +60 °C
Relative humidity: 10 % to 75 % RH

Dimensions and weight
Dimensions (L x W x H): 255 x 63 x 45 mm
Weight: 305 g

Product information
Brand: Trotec
Model name: SL 400
Supplier reference: 3510005020
EAN code: 4052138013991
Product classification: EQUIPMENT