Your Smart Tank Monitoring Assistant A smart oil tank level gauge to check your heating oil tank in the basement instead of running errands. It comes with a concentrator which has a larger detection range and a more precise detection angle to adapt to more types of oil tanks and improve the oil level accuracy. The unit contains 2 lithium batteries, which can last for at least one year when you get it. With our T-Meter, you can know your home heating oil tank usage data on your smartphone. Click on our T-Meter APP to easily check your oil tank level anytime, anywhere, whether you are at home, on vacation or at work. DIY set your oil level alarm value. You will receive an email from our T-Meter to remind you that it is time to order oil when your oil level is below the alarm value. Installation Precautions PLEASE NOTE!!! This device is only for use with tanks installed above ground, not with tanks installed underground. And it must be installed directly on the opening of the oil tank, do not install it on the pipe outside the oil tank. The Function of The Configure Button ● Connect to WiFi Via Bluetooth: Press the button three times to make sure the blue LED blinks and select "via Bluetooth" to connect to your WiFi!!! And it Only supports 2.4GHz WiFi. ● Update Data in real time: Press the button to update readings and usage data immediately when connected or when your tank is refueled. Check Your Oil Level At A Glance Through The Oil Level Display The T-Meter app allows you to quickly check the remaining amount of your heating oil tank through an intuitive oil level display. Then you know when you should order oil so you will no longer worry about running out of heating oil. The Chart Shows The Details Of Your Heating Oil Level/Usage Just switch daily, weekly, monthly, and yearly to view your fuel consumption data, in order to understand how much your home heating oil is spent, and easily grasp when your heating oil is consumed the most. Customize Your Oil Tank Size Your tank size is not in the list? Click here to customize and add your heating oil tank. Any of your tank sizes will not be ignored. Low Oil Level Alarm Notification Customize the oil level alarm value you want. For example, if you set the alarm value to 40%, 30% or 10%, you will receive an email notification when its oil level reaches this value. You never have to worry about missing an order for oil anymore.