The ST-12D complies with the IEC 61672-1:2013 Class 1 standard, designed for professional noise measurement and research. It offers a wide measurement range of 25 to 140 dB and can measure parameters such as Leq, Lpeak, Lmax, Ln, and others. The ST-12D also supports a spectrum analyzer with optional octave band filters (1/1 and 1/3), enabling real-time frequency analysis for precise noise assessments.
| Meets Standard | IEC 61672-1: 2013 Class 1 |
| Dimensions | 250 × 76 × 33 mm |
| Weight | 340 grams |
| Display | 2.4 inch 240 × 320 pixel color display Adjustable brightness and switchable backlight |
| Screen Resolution | 0.1 dB |
| Refresh Rate | 0.5 seconds |
| Main Measurement Parameters | 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, I10 |
| Measurement Range | 25 ~ 140 dB (143 dB C peak) |
| Accuracy | ± 0.5 dB |
| Frequency Range | 10 Hz to 20 kHz |
| Frequency Weighting | A, C, Z |
| Time Weighting | F, S, I, I10 |
| Time Integration | 1s ~ 99 hours 59 minutes 59 seconds |
| Audio Recording | Records noise data in MP3/WAV format Synchronization/trigger mode Sampling rate: 12 kHz, 24 kHz, 48 kHz / 16 bit, 24 bit |
| Storage Capacity | 4 GB internal memory 64 GB SD Card |
| Output Interface | USB Type-C, Bluetooth, AC/DC signal, serial |
| Power Supply | 4 AA alkaline batteries External power adapter (USB Type-C adapter): 5 V, 1 A |
| Operation Time | Max 24 hours with 4 AA alkaline batteries (Operating time varies depending on device settings and battery type) |
| Operating Environment | Operating temperature: -20 ~ 60 °C Relative humidity: 20% ~ 90% |
