This document discusses various methods for industrial level measurement of liquids and solids. It describes point level and continuous level sensors for both liquids and solids. For liquids, common point level detection methods include ultrasonic, float-based, pneumatic, and conductive sensors. Continuous liquid level detection uses technologies like magnetostrictive, resistive chain, and hydrostatic pressure. Solid level measurement techniques involve vibrating point, capacitance, ultrasonic, laser, load cell, and float sensors. Key factors that influence sensor selection include the material phase, temperature, pressure, and tank properties.