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DHE radar level gauges are used quite frequently in measurement systems across various industries, and they are affected by many factors during use, which may impact the accuracy of measurements. Based on their many years of practical experience in production and testing, the technical staff at Xi’an Dinghua Electronics explain to customers the various factors that can cause interference during the operation of DHE radar level gauges. I. During the measurement process of the DHE radar level gauge, common interferences can be divided into two types: DC interference and AC interference. 1. DC interference: In the measurement circuit of radar level gauges, the presence of an additional DC voltage constitutes DC interference. In severe cases, it will prevent the measuring instruments from functioning properly. The sources of DC interference include the following: (1) additional thermoelectric potential. (2) Chemical potential. (3) When the radar level gauge comes into contact with a DC power supply, the leakage current will generate an interference voltage in the measurement circuit. 2. AC interference: AC interference can be further divided into inter-wire interference and ground interference. Inter-wire interference refers to the occurrence of alternating voltage between the output terminals of a radar level gauge (compensation wires) as a result of external influences. This type of interference is also known as lateral, common-mode, or common-terrain interference. Under normal conditions, the inter-wire interference voltage can reach several millivolts or even dozens of millivolts. Ground interference refers to the phenomenon that occurs at one of the two output terminals of a radar level gauge (or compensation wire); the AC voltage at that terminal with respect to ground is known as the ground interference voltage. This type of interference is also known as longitudinal, intermodulation, or serial interference. Under normal circumstances, the interference voltage relative to ground can reach several volts or even over 100 volts. The main sources of alternating current interference are as follows: (1) Electromagnetic induction is the primary source of interference between wires. (2) Effects of high-temperature leakage. (3) High-voltage electric field interference. (4) Geoelectric current interference. (5) Impact of suction and leakage currents. (6) Temperature measurement on live conductors can also introduce AC interference.