| Technical parameters | Parameter values |
| Brand | SONBEST |
| PM2.5 range | 0～999ug/m3 |
| PM2.5 accuracy | ±15% or ±10ug/m3 max @25℃ |
| PM10 range | 0～999ug/m3 |
| PM10 accuracy | ±15% or ±35ug/m3 max @25℃ |
| Communication Interface | RS485 |
| Default baud rate | 9600 8 n 1 |
| Power | DC9～24V 1A |
| Running temperature | -30～80°C |
| Working humidity | 5%RH～90%RH |
BRAND: SONBEST
TYPE: SM2171B
Email: sale@sonbest.com
WeChat: 13918126020
SKYPE: SOOBUU
Phone: +86-021-66862075
QQ1: 71182854 QQ2:613035997