Wifi Distance Sensor
It does however have to be within your homes wlan wifi envelope.
Wifi distance sensor. To send data wirelessly to a pc you can use either bluetooth wifi rf xbee modules. In their aranet ultrasonic distance sensor they use our sensor to measure the distance to an object. However fix the sensors pointing directly vertically downwards toward the water at the height you measured before see the picture should be at depth1 and depth2. Wiring your sensor is a relatively simple process as most pins of the distance sensor map directly to a pin on the raspberry pi.
The board can be configured via a web browser to connect to your wireless router. Ethernet network connection or wifi dongle the pi 3 has wifi inbuilt raspberry pi distance sensor hardware setup. If your tanks are at a greater distance wifi extender could be used. They serve the industry with wireless sensors base stations and cloud solutions.
To measure the distance in the 0 30 cm range ir sensor are good here are some sensors you can look at. Infrared proximity sensor long range sharp gp2y0a02yk0f. The sure cross u gage k50u ultrasonic sensor works in a variety of environments to provide a measurement of the distance between the target and the sensor. It is designed to be used with a banner wireless node or multihop modbus radio creating a cost effective easy to use wireless solution for monitoring mobile or remote tanks and totes.
It measures distance and sends a signal via wifi to a selectable ip address and port number via tcp protocol.