Protmex PT6708 Sound Level Meter - Accurate 30-130 dB Measurement

In this review the Protmex PT6708 proves to be a compact, no-nonsense sound level meter for hobbyists, facility managers, and small workshop owners who need a reliable decibel snapshot without complex software. The single biggest reason to buy is its sensitive AD636-based sensor and condenser microphone that respond quickly and report readings from 30 to 130 dB with a claimed +/-1.5 dB accuracy, making it useful for routine noise checks, basic compliance spot checks, and audio troubleshooting.

Key Features

• Fast response: The meter responds within 0.5s so short bursts and transient sounds are captured quickly for immediate readout.
• Wide measurement range: Covers 30 to 130 dB, which handles quiet rooms through loud machinery and audio systems without needing extra equipment.
• Fast and slow modes: Switchable time constants (0.125s fast, 1s slow) let users choose rapid tracking or smoothed readings for fluctuating environments.
• A/C weighting selection: Choose A-weighting for human-audible ambient checks or C-weighting for analysis of machinery and low-frequency sources.
• Practical display features: Large LCD with backlight, MAX and data hold functions, and automatic backlight power-off help with nighttime or awkward-angle measurements.
• Portable design: Anti-slip composite housing and energy-saving circuitry keep the unit durable and useful across workshops, schools, and field checks.

Who It's For

The PT6708 is well suited for DIYers, audio hobbyists, school facilities staff, and small business owners who need a handheld meter for quick spot checks, verifying noise levels near machinery, or tuning home audio. Its simple controls and visible backlight make it practical for occasional field use.

It is not aimed at users who need automated logging, calibration certificates, or multi-channel laboratory-grade analysis; the device cannot generate reports or replace a calibrated lab meter for regulatory certification without third-party calibration.

Pros & Cons

Pros

• Good sensitivity and quick response for detecting short noise events and low-level sounds.
• Useful feature set including MAX, data hold, A/C weighting, and fast/slow response modes.
• Clear, backlit large LCD and a rugged, anti-slip body for field convenience.
• Includes batteries and meets IEC651 Type 2 / ANSI Type 2 class expectations for general use.

Cons

• Accuracy reports are mixed in customer feedback, so professional users should consider calibration before compliance testing.
• Cannot store data or produce reports directly from the device, limiting use in formal surveys.

Specifications

Measurement range	30 to 130 dB
Accuracy	1.5 dB
Resolution	0.1 dB
Response time	Fast 0.125 s / Slow 1 s
Microphone type	Electric condenser microphone
Weighting	A and C selection
Standards	IEC651 Type 2 / ANSI S1.4 Type 2

Our Verdict

The Protmex PT6708 is a practical, value-packed handheld decibel meter for routine noise checks and troubleshooting where portability and clear readouts matter. It delivers fast readings, selectable weighting and response modes, and useful display features; professionals needing calibrated report-ready data should plan for external calibration or a higher-end logger, but for everyday inspection this unit represents solid value.

Frequently Asked Questions

Does the meter include batteries?
Yes, the unit ships with batteries included so it is ready for immediate use out of the box.

Can the device record or export data?
No, the PT6708 does not store measurements or generate reports internally; readings must be recorded manually.

Is the accuracy good enough for workplace checks?
The meter meets IEC651/ANSI Type 2 expectations and is suitable for general workplace spot checks, but for formal compliance tests a calibrated instrument or calibration certificate is advised.