Please do you have gas level monitoring sensors that can be retrofitted into lpg cooking gas composite cylinder to monitor gas level and auto ascertain users and gas distributors of a cylinder that needs refill when it gets to a preset low level. Or can you make a video on how to build this kind of sensors with the parts needed. I need a sensor module that the battery can last for 10 years or 5 years Atleast and both the sensor and battery will be inside the cylinder but at the very top.