Liquid Level Sensor, AC/DC 0~220V Stainless Steel Liquid Water Level Sensor Liquid Float Switch Tank Vertical Water Level Sensor for Pool Can 100mm: Amazon.com: Industrial & Scientific
Level Switch, Float Switch, Level Sensor, Level Float Switch(id:6795335) Product details - View Level Switch, Float Switch, Level Sensor, Level Float Switch from LKS West Instruments Sdn Bhd - EC21 Mobile
Float Sensor Switch For Water Level Controller Both Side Sense
What is a Level Sensor? | Types of Level Sensors - RealPars