ST-12D complies with the Class 1 IEC 61672-1:2013 standard, designed for occupational noise measurement and research. It features a wide measurement range of 25 to 140 dB and is capable of measuring parameters such as Leq, Lpeak, Lmax, Ln, and more. The ST-12D also supports a spectrum analyzer with optional 1/1 and 1/3 octave band filters, enabling real-time frequency analysis for precise noise assessments.
Sound Level Meter - ST 12D Class 1 | 一級聲音計
Fulfils Standard IEC 61672-1: 2013 Class 1
IEC 61672-1: 2013 Class 1Dimensions 250 × 76 × 33 mm Weight 340 g Display 2.4-inch
240 × 320 pixel full-color display
Adjustable brightness & backlight can be turned offDisplay Resolution 0.1 dB Refresh Rate 0.5 s Main Parameters of Measurement LXYp, LXYmax, LXYmin, LXeq, LXeq,T, LXeq,t, LXpeak, L5, L10, L50, L90, L95, SD, Ld, Ln, Ldn, SEL, LXE, E, TWA, Lex, 8h, LAVG, DOSE
X = A, C, Z
Y = F, S, I, I10Measurement Range 25 ~ 140 dB (143 dB C Peak) Accuracy ± 0.5 dB Frequency Range 10 Hz ~ 20 kHz Frequency Weighting A, C, Z Time Weighting F, S, I, I10 Integrating Time 1s ~ 99 h 59 m 59 s Audio Recording Record noise data in MP3/WAV format
Synchronize/Trigger mode
Sampling rate: 12 kHz, 24 kHz, 48 kHz / 16 bit, 24 bitStorage Capacity 4 GB internal memory
64 GB SD cardOutput Interface USB type-C, Bluetooth, AC/DC signal, Serial Power Supply 4 x AA alkaline batteries
External power supply (USB type-C adapter): 5V, 1AOperation Time Max 24hrs by 4 x AA alkaline batteries
(The operation time varies depending on the device settings and battery type)"Operation Environment Working temperature: -20 ~ 60 °C
Relative humidity: 20% ~ 90%