Selecting Ultrasonic Level Sensors

Which Questions Should I Ask Before Buying a level measurement sensor?

​The main questions which need to be considered before selecting a level measurement sensor:

• What are the contents being measured – liquid, solid, slurry or powder?
• Are level measurements required either continuous or will point level (discrete) measurements suffice?
• What are the minimum and maximum temperatures and pressures associated with the application?
• What is the required level measurement range?
• What measurement accuracy is required?
• Is it possible to penetrate the vessel wall to accommodate an insertion level instrument or locate the level instrument inside it?
• If liquid, is there any turbulence, foam or vapour at the surface?
• Is an integral display or remote display required?
• What kind of output / alarms are required eg analogue, relay, etc ?