Are you interesting in BLE All-in-One Ultrasonic Fuel Level Sensor for Fleet Fuel Monitoring?
 
* No Drawing Holes in Tank
* Support Fuel Theflt Alarm I/O output (5V)
* Support Diesel/Gasoline/Lube Oil, etc.
* Support Metal/Iron/Stainless steel/Aluminum/Plastic thank
* Output Interface:  RS232/RS485+Analog+Bluetooth
* Mobile IOS/Android App configuration & Calibration

Compatible with Teltonika, Xirgo, Queclink, Calamp, DigitalMatter,GeoTab, Meitrack, Jimi, Streamax, Howen and most M2M hardware.
 
Contact me today and let's talk for more.