FEATURES AND ADVANTAGE: 1. The instrument has the added advantage of fast test speed, high sensitivity, good stability, light weight, and simple operation. 2. The product displays real-time dust concentration. Alarm value can be set by users to warn of excessive dust concentration in the ambient air. 3. The product has a built-in buzzer alarm, and it also allows user to connect the external sound and light alarm to a switch/relay output. In addition, the product can be connected with the external ventilation fan, when the dust concentration is too high, the instrument will automatically start the ventilation fan to reduce dust concentration in the measuring space. 4. Widely applied in the various industries to ensure safe production. 5. The instrument has a variety of output modes, including 4-20mA analog, RS485 and digital output. It can also be connected to a computer to achieve data transmission and remote monitoring. 6. Monitor the dust concentration in multiple areas simultaneously.