Hi Leosoft.

I have nothing. I have almost given up on this project. Ive tried ultrasonic sensors and TOF laser sensors to detect the water level but they all have a cone of detection that hits the side of the tank and gives false readings. THis is why I was excited for this DFRobot presure sensor.

I have read that lots of people have this problem but all point to bad power. How can you have bad power from a 12v fully charged lead acid battery? I used a lipo battery.

My next step is to maybe buy another SEN0262 current to voltage converter just in case this one is a dud. I must say that the documentation is poor from DFRobot. They even have errors in their schematic. They also mention in the code a 120 Ohm resistor. Is this built in or should we add it to the circuit? 

https://wiki.dfrobot.com/Throw-in_Type_Liquid_Level_Transmitter_SKU_KIT0139

Also i may look at using a 16bit analog to digital converter ADS1115 which is an I2C device so insead of using the A0 analog pin on the Wemos or UNO as I have read that they are not too accurate. That may help but if it is the current to voltage adapter thats causing the problem or the pressure sensos themselves then I've wasted $$ and time.

Does DFRobot monitor these forums? Why do they not answer?

Richard.