Arduino - Gas Boiler System Monitoring Unit

I require the circuitry and component schematic, as well as the Arduino Code for this project. Was potentially looking at this project running of an Adruino UNO, but open fpr best possible Adruino unit based on requirements. Gas Boiler System Monitoring Unit I need to build needs to monitor various sensors at various gas boiler systems in various geographical locations. The values of the various sensors at each gas boiler system needs to be sent out, so that the readings can be displayed on a dashboard on the web/mobile for each boiler system. If the values of the sensors are a certain value or parameter, then warning emails/messages are sent out to service and maintenance crews. Step 1 would be the hardware portion of the project outlined below. List of sensors to be monitored by the Gas Boiler System Monitoring Unit at each boiler system: 1 x Power Sensor 2 x Current Sensors (230v) 1 x Pressure sensor (Natural Gas Pipe) 2 to 4 x Temperature Sensors (Hot Water In Pipes) Projects details: The boiler system(s) that need to be monitored is supplied by Natural gas, so a pressure sensor will be needed to monitor the gas pressure in the pipe supplying the boiler system. The boiler also requires 230v AC supply for the boiler to operate,. A sensor is required to only monitor if the power supply is on/off, not to concerned on the actual reading/value of the voltage. This may not need a sensor as such. There are generally two circulating pumps. I would like to have a CT monitoring the amperage of each pump. There are generally 2 to 4 different hot water pipes I need to monitor. Have been looking at using some type of a DS18B20 probe sensor. There is AC power for the supply and charging of a backup battery at each boiler system. The communication for the monitoring of each boiler system will most likely be either via sigfox or GSM module, and if available WI-FI. I would also like to have a LCD screen locally to see the current values on the unit.