Wifi Distance Sensor
The board can be configured via a web browser to connect to your wireless router.
Wifi distance sensor. To measure the distance in the 0 30 cm range ir sensor are good here are some sensors you can look at. 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. Infrared proximity sensor long range sharp gp2y0a02yk0f. 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.
Ir distance sensor includes cable 10cm 80cm gp2y0a21yk0f. It does however have to be within your homes wlan wifi envelope. It measures distance and sends a signal via wifi to a selectable ip address and port number via tcp protocol. Wiring your sensor is a relatively simple process as most pins of the distance sensor map directly to a pin on the raspberry pi.
If your tanks are at a greater distance wifi extender could be used. Aranet is an aurora colorado based company producing solutions for warehousing cold storage horticulture building automation and food manufacturing. 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. In their aranet ultrasonic distance sensor they use our sensor to measure the distance to an object.
To send data wirelessly to a pc you can use either bluetooth wifi rf xbee modules.