Product Mode： Fixed mode of products： Test Speed： Number of tests： Equipment size： Description: 1. Range: Three-position switch 2. Test method: The test is conducted by clamping with a fixed bracket, and the test is performed at a distance of 10cm from the emitter to the negative ion tester. The amount of negative ions generated is directly proportional to the magnitude of the output negative high voltage. Test data can be transmitted. 3. Height adjustment: 0-300MM