Digital constant current dust samplerProduct Features:

1. Constant voltage and current, brushless vacuum pump, automatic closed-loop control technology. The instrument can automatically adjust the flow rate according to the load size without being affected by voltage fluctuations and resistance changes

2Quick programming: Multiple different sampling modules can be set through shortcut keys to quickly set the required flow rate and time.

3Ultra long battery life, can work continuously for 7 hours on a full charge @ 20L load 5Kpa, fully meeting the requirements of PC TWA dust sampling at fixed points

4Multiple sampling settings can be implemented to achieve constant volume, timed, and interval sampling, meeting users' different setting needs

5Traffic self calibration: Users can independently calibrate the sampled traffic

6Super Load: Hollow Cup Brushless Pump Machine, Overcoming Sampling Resistance of Micro porous Membrane or Even Polytetrafluoroethylene Membrane

7Optional pre metering temperature and pressure functions

Usage and precautions:

1. Preparation work before sampling
Before sampling, the instrument should be fully charged, and the weighed clean filter membrane should be installed into the sampling head (the lining box of the cyclone sampling head also needs to be equipped with a filter membrane), and then the sampling head should be connected to the instrument inlet with a rubber hose.
2. Operation of instruments
When sampling is required, press the start stop button once, and the host will start working. If measuring the dust concentration in the surrounding air of an individual, it can be carried by personnel. If it is necessary to measure a certain If the air concentration at the location is high, you can choose a suitable location to hang it. After sampling is completed, press the start stop button again to stop the instrument from working. Record the sampling time to end.
3. Precautions
(1) During underground use, it is strictly prohibited to open the back cover. If there is a malfunction, it should be returned to the surface for repair.

(2) If the instrument suddenly stops working while the timer is still working during the working process, it indicates that the battery voltage is insufficient and cannot continue to be used. It is necessary to charge it in a timely manner according to regulations.

(3) After each use, the instrument should be fully charged and properly stored to prevent debris from entering the pump body through the intake nozzle and causing malfunctions.