Zinc reference electrode uses: 1. Accurate monitoring of cathodic protection status. Used as a sacrificial anode to protect the potential measurements, protection potential between the 0V ~ +0.25 V. 
 2 in impressed current cathodic protection system for automatic control of the stability of the signal source. For underground pipes and cathodic protection of underground metal structures engineering. 
 3 can be planted in the need to monitor the position and who can not enter, such as: the center of the bottom of large containers, underground fuel tanks, chemical storage tanks can be made between close position; city pipe network under the road, in the pre-construction period buried, long-term use. 4 pipeline cathodic protection of telemetry signal.