Best Water level controller is Saveon. I have fitted the same to my clinic and home. It’s perfectly working for the last 3 years. Previously I used videon automatic controller but their after sales service is very poor. Another thing is Saveon coming with 20 meters cable and sensors so there is no need to connect with sensors. An electrician can fit it perfectly and have user manuals, fitting instructions etc. Since I am not faced any issue for the 3 years, I don’t have enough knowledge about after sales service of Saveon. If there is any problem made on the water level controller in Chennai contact helpline number, They will help you and there is a helpline number provided upon the device. Their website is www.saveon.co.in