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Sf6 Dew Point Moisture Tester. Automatic Self-Calibration: Eliminates zero drift and systematic errors without tedious annual checks. Rapid Gas Saving: SF6 gas partition dew point testing completes within 5 minutes after startup. Large Capacity Data Storage: Stores up to 200 groups of test data with RS232 interface for PC upload. Long Battery Life: Built-in 4Ah lithium battery provides 10 hours continuous working time. Reliable Sealing Joints: Features imported German self-locking joints ensuring safety and no leaks. Clear Touch Screen Display: 3.5-inch color LCD displays dew point, humidity, temperature, and time.