You can receive an SMS (and/or e-mail) when your tank level rises above or drops below certain levels. To set or change the preferred threshold levels (as a percentage of tank capacity) to establish the critical levels appropriate to your situation, go to Monitor in Global. In Monitor, from the cog menu in the top right hand side of the panel,
select the Configure button:
This will take you through the same steps as the initial setup.
Click 'next' to continue till you reach "4. Set your notification parameters".
Set the threshold levels (as a percentage of tank capacity) appropriate to your situation.
Check each box for which notifications should be sent. For example, if you check “Very high” and “Low,” you will receive an SMS (and/or e-mail) when the tank level either rises above the “Very high” mark (94.86%) or drops below the “Low” level (40%).
Once you are happy with the details, click 'done' to save your new tank configuration.