This Liquid Water Level Sensor can be used to detect the liquid levle in tube/pipe. We'd like to settle any problem in a friendly manner. It's just take you 1 minute. Tiny in size, easy to install.
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DC 12V Automatic Water Level Sensor Controller Switch Liquid Level Detection Sensor Control Relay for Tower Tank Pool Pump Motor
Aliexpress UK
Conductive fluid. Stop pumping when the water level reaches C probe. A/B/C water level sensing wire can be used ordinary wire, wire exposed 5CM. when the water level is lower than point B automatically pumping, when the water level is high sub-point C stop pumping!
eBay
Moray ME202WZ 10M Zigbee Tuya Mobile App Smart Home Wireless Submersible Liquid Level Sensor Water Level Sensor
Aliexpress UK
A float switch is a device used to sense the level of liquid within a tank, it may actuate a pump, an indicator, an alarm, or other device. 2Pcs Liquid Float Switch. Switching current (Max): 0.5A. Contract resistance (Max): 100 OHM.
eBay
ME202WZ 5m Zigbee Wifi Tank Liquid Depth Level Meter Monitor Water Addition Level Gauge Submersible Liquid Level Sensor
Aliexpress UK
When the pool (water tower) pump is automatically turned on. 1 Water Level Detection Sensor. It has the characteristics of simple wiring, low power consumption, large switching quantity, strong anti-interference ability and high stability.
eBay
8-in-1 Wireless Solar Water Level Indicator Sensor Tank Level Gauge with LCD Display Liquid Level Meter & Temperature Monitor
Aliexpress UK
When the pool (water tower) pump is automatically turned on. 1 Water Level Detection Sensor. Material: PCB board. It has the characteristics of simple wiring, low power consumption, large switching quantity, strong anti-interference ability and high stability.
eBay
Water Level Detector Capacitor Liquid Level Sensor Switch Induction Non-contact Liquid Level Detection
Aliexpress UK
2X 12V 24V Float Switch Fluid Water Liquid Level Sensing Switch Sensor Pool Tank. A float switch is a device used to sense the level of liquid within a tank, it may actuate a pump, an indicator, an alarm, or other device.
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11-20m 4-20mA level measuring instruments throw-in type controller water tank level indicator static level sensor
Aliexpress UK
When the pool (water tower) pump is automatically turned on. It has the characteristics of simple wiring, low power consumption, large switching quantity, strong anti-interference ability and high stability.
eBay
2M 5M 10M 15M 20M Liquid Level Transmitter RS485 Hydrostatic Liquid Level Transducer 4-20mA 0-10V Water Level Sensor
Aliexpress UK
A float switch is a device used to sense the level of liquid within a tank, it may actuate a pump, an indicator, an alarm, or other device. 1 Pcs Liquid Float Switch. Switching current (Max): 0.5A. Contract resistance (Max): 100 OHM.
eBay
RS485 radar Level Controller Integrated Sensor Automatic Switch Water Level Meter Material Level Display
Aliexpress UK