Description
Product Overview
The Triplett SLM400 is a compact, handheld sound level meter designed for professional noise monitoring. Measuring total noise exposure (%dose) over an 8‑hour workday, it complies with OSHA, MSHS, DOD, ACGIH, ISO85 and ISO90 standards. The device features a 4.4 x 2.6 x 1.3 in chassis, weighs only 6.08 oz, and offers both standard and NIST‑traceable calibration options. User‑programmable SPL and peak alarms, multiple weighting filters (A, C, Z) and time constants (Fast, Slow, Impulse, Peak) provide flexible measurement setups. Data can be logged up to 1 000 k readings and transferred via USB for detailed analysis.
![[Product front view showing all components]](https://www.eolviro.store/wp-content/uploads/2026/06/eac9e4db3d4d4f7b815e4eeaff00f68e.jpg)
Usage
Ideal for industrial plants, construction sites, laboratories and field surveys, the SLM400 helps safety officers quickly assess noise hazards and determine required control measures. Its portable design allows easy carry‑on for on‑site inspections, while the built‑in datalogger captures continuous exposure data for later reporting. Whether you are conducting OSHA compliance checks or evaluating acoustic environments for equipment installation, the SLM400 delivers reliable results.
Why Choose Us
Triplett is a trusted name in test equipment, offering rigorous quality control and a Certificate of Traceability to NIST for calibrated models. Each unit undergoes thorough functional testing and comes with comprehensive user documentation. Our dedicated support team provides technical assistance, calibration services and rapid replacement parts, ensuring minimal downtime for your measurement programs.
Key Features
- Accurate 8‑hour noise dose calculation meeting multiple international standards
- Programmable SPL and peak alarms keep workers informed of hazardous levels
- USB interface enables easy data export and detailed post‑analysis
- Compact, lightweight design for effortless field deployment
- Dedicated customer support and optional NIST traceability certification
FAQ
What standards does the SLM400 comply with?
The meter meets OSHA, MSHS, DOD, ACGIH, ISO85 and ISO90 requirements for noise exposure monitoring.
Can the device store large amounts of data?
Yes, it can log up to 1 000 k readings, allowing extensive surveys without needing frequent off‑load.
Is a NIST‑traceable calibration available?
Models marked with “NIST” include a Certificate of Traceability to NIST, ensuring the highest calibration accuracy.
How does the USB connection work?
Connect the meter to a computer via the built‑in USB port to download stored events and configure measurement settings using Triplett’s software.
What battery life can I expect?
The SLM400 operates for up to 20 hours on a standard rechargeable battery, suitable for full‑day field work.




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