介绍了浮子式水位检测技术、电容式水位检测技术、压力式水位检测技术、超声波式水位检测技术和气泡式水位检测技术的原理、特点及适用场合,并指出这几种水位检测技术各有特点:磁浮式水位变送器适合检测最大水深在6m内、水质相对干净的水塔、蓄水池等的水位；电容式水位变送器适合检测水质干净、蓄水容器直径大、水位深的江河湖泊的水位；压力式水位变送器适合检测蓄水容器直径较小的水井的水位；超声波式和气泡式水位变送器尽管克服了水质对测量精度的影响,但结构复杂、价格高,应慎重选择.%The paper introduced principle, characteristics and applicable situation of water level detection of float type, capacitive type, pressure type, ultrasonic wave type and bubble type. It indicated that the technologies of water level detection have different characteristics: float type water transmitter is suitable to detect water level of water tower and reservoir with the maximum water of depth 6 m and clear water quality; capacitive type water transmitter is suitable to detect water level of rivers and lakes with clear water quality, big diameter of water container and deep water level; pressure type water transmitter is suitable to detect water level of well with smaller diameters of water container; ultrasonic wave type and bubble type water transmitter need be chosen carefully with complex structure and high cost although they overcome influence of water quality on measuring accuracy.
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