# Tenma 72-947 Digital Sound Level Meter with USB Interface and Datalogging vs Galaxy Audio CM-140 Check Mate SPL Meter: specs and price compared

A sourced, side-by-side comparison of the Tenma 72-947 Digital Sound Level Meter with USB Interface and Datalogging (Tenma) and Galaxy Audio CM-140 Check Mate SPL Meter (Galaxy Audio) among sound level meters. Galaxy Audio CM-140 Check Mate SPL Meter is the cheaper of the two at $179.99.

## Side by side

| Spec | Tenma 72-947 Digital Sound Level Meter with USB Interface and Datalogging | Galaxy Audio CM-140 Check Mate SPL Meter |
| --- | --- | --- |
| US price | $231.92 | $179.99 |
| Brand | Tenma | Galaxy Audio |
| Measurement range (dB) | 30 to 130 dB | Lo 32-80 dB, Med 50-100 dB, Hi 80-130 dB |
| Accuracy (dB) | ±1.4 dB | ±1.5 dB |
| Frequency weighting | A, C | A (per IEC 651/ANSI S1.4 Type 2) |
| Time weighting | Fast (125ms) / Slow (1s) | Fast/Slow |
| Resolution (dB) | 0.1 | 0.1 |
| Data logging | Internal datalogging up to 20,000 records; USB interface with Windows datalogging software | No |
| Microphone type | 1/2 in. electret condenser | Electret condenser |

## Key differences

- Measurement range (dB): Tenma 72-947 Digital Sound Level Meter with USB Interface and Datalogging 30 to 130 dB vs Galaxy Audio CM-140 Check Mate SPL Meter Lo 32-80 dB, Med 50-100 dB, Hi 80-130 dB
- Accuracy (dB): Tenma 72-947 Digital Sound Level Meter with USB Interface and Datalogging ±1.4 dB vs Galaxy Audio CM-140 Check Mate SPL Meter ±1.5 dB
- Frequency weighting: Tenma 72-947 Digital Sound Level Meter with USB Interface and Datalogging A, C vs Galaxy Audio CM-140 Check Mate SPL Meter A (per IEC 651/ANSI S1.4 Type 2)
- Time weighting: Tenma 72-947 Digital Sound Level Meter with USB Interface and Datalogging Fast (125ms) / Slow (1s) vs Galaxy Audio CM-140 Check Mate SPL Meter Fast/Slow
- Data logging: Tenma 72-947 Digital Sound Level Meter with USB Interface and Datalogging Internal datalogging up to 20,000 records; USB interface with Windows datalogging software vs Galaxy Audio CM-140 Check Mate SPL Meter No
- Microphone type: Tenma 72-947 Digital Sound Level Meter with USB Interface and Datalogging 1/2 in. electret condenser vs Galaxy Audio CM-140 Check Mate SPL Meter Electret condenser

## Sources

- Tenma 72-947 Digital Sound Level Meter with USB Interface and Datalogging: https://www.farnell.com/datasheets/2616992.pdf (farnell.com, verified 2026-08-09)
- Galaxy Audio CM-140 Check Mate SPL Meter: https://galaxyaudio.com/products/cm-140/ (galaxyaudio.com, verified 2026-08-09)

Canonical: https://frontdeskreview.com/gear/sound-level-meters/tenma-72-947-vs-galaxy-audio-cm-140/
Cite: Per The Front Desk Review, Tenma 72-947 Digital Sound Level Meter with USB Interface and Datalogging ($231.92) vs Galaxy Audio CM-140 Check Mate SPL Meter ($179.99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/sound-level-meters/tenma-72-947-vs-galaxy-audio-cm-140/
License: CC BY 4.0.