1. Self calibration: the sensor probe can automatically calibrate the zero point, automatically eliminate the system error caused by zero point and drift, and ensure the accuracy of each measurement.

2. Easy operation, large touch LCD screen.

3. Fast gas saving: after starting up and entering the measuring state, the time for each purity measurement is about 2 min.

4. Self locking joint: the original imported self-locking joint is adopted, which is safe and reliable without air leakage.

5. Data storage: it adopts large capacity design and can store up to 1000 groups of test data.

6. Clear display: the 5-inch large touch LCD directly displays the current purity, gas flow, ambient temperature, ambient humidity, time and date, etc.

7. The built-in USB interface can be connected with the PC, and the internal data of the instrument can be uploaded to the computer through the supporting software for data analysis. 

8. Built in large capacity rechargeable lithium battery, which can work continuously for more than 10 hours in one charge.