Alion fortune HK Limited GM1357 engineering development tool 30-130 dBA 35-130 dBC

Sound Level Meter 30-130 dBA

The Alion fortune HK Limited GM1357 is a digital sound level meter designed for engineering development and noise assessment tasks. It measures A-weighted levels from 30 to 130 dBA and C-weighted levels from 35 to 130 dBC with a stated accuracy of +/- 1.5 dB. The instrument conforms to IEC 651 Type 2 and ANSI S1.4 Type 2 standards. A 1/2 inch polarization capacitance microphone captures sound across a 31.5 Hz to 8.5 kHz frequency range.

Technicians needing Class 2 compliance.

This meter suits professionals conducting environmental noise surveys, industrial hygiene checks, or product validation where Type 2 tolerance is accepted. The five selectable measuring ranges from 30-130 up to 80-130 allow flexible gain staging. It is not for buyers who need Class 1 precision or laboratory-grade traceability tighter than the specified +/- 1.5 dB. Users requiring real-time data logging or computer connectivity should look at instruments offering those interfaces.

Accuracy +/- 1.5 dB defines suitability

The single specification that decides fit is the +/- 1.5 dB accuracy claim under IEC 651 and ANSI S1.4 Type 2 standards. If your procedure mandates a tighter tolerance, this model will not meet the requirement. If Type 2 tolerance is acceptable, the 0.1 dB resolution, FAST and SLOW time weightings, and dual A/C frequency weighting support typical compliance measurements. Power comes from four AA batteries or a 6 V DC adapter, neither included.