Frequently Asked Questions

The Smart Oil Gauge goes in one of the openings on the top of the tank. There is typically at least one unused opening with a plug in it (another opening is used for the existing gauge, while another is used for the fill pipe, and another for the vent). Simply unscrew the plug from one of the unused openings, and install the Smart Oil Gauge in its place.

The Smart Oil Gauge fits into a 2" NPT opening on the top of a tank. Please note that the outer diameter of a 2" NPT pipe is not 2 inches, but actually closer to 2-3/8 inches. A 1.5" adapter is available for tanks with a smaller opening.

Yes, you can check your tank level from anywhere in the world. Your phone does not have to be connected to your home’s router to view what’s in the tank.

When a tank is filled, the oil level is often too close to the ultrasonic sensor to get a reliable reading, so the Smart Oil Gauge will just say 'Full'. There is also an airspace kept at the top of the tank to prevent over-filling. As a result, a 275 gallon tank typically holds between 240-260 gallons when completely full. Occasionally, the sensor may produce some unusual readings for a few days after a fill, but once the level lowers a bit, it will go back to normal.

The upload interval, in hours, dictates how long the device waits before waking up and uploading its latest readings to the cloud. A setting of 1 means the device will wake up and upload every hour; a setting of 24 means the device will only wake up once per day and upload readings. The device will still take a reading once per hour regardless of this setting; it just won’t upload the new readings until the interval passes. For longer battery life, a longer upload interval is recommended.

The sensor currently supports standard vertical or horizontal 138, 220, 240, 275 and 330 gallon above-ground tanks, as well as 500 and 550 gallon cylindrical tanks. Roth adapter required for 400L, 620L, 1000L, and 1000LH. Not compatible with Roth 1500L. Custom tank sizes can be accommodated as well; call 203-456-1499 or email contact@dropletfuel.com to check compatibility. Above ground tanks only.

Open the app and navigate to the My Tanks page. For iOS devices, hit the ‘+’ in the top right; for Android devices, select ‘Sensor Setup’ and follow the instructions to update WiFi. The app will ask you if you are setting up a new gauge, or just updating WiFi; select update WiFi and you are all set!

For iOS devices, click Configure, then '# of Notifications'. From there, click the '+' sign to add a notification/alert. Once you've selected the alert and entered the e-mail address or phone number, press Done. You can continue setting up alerts by pressing the '+' sign. For Android devices, navigate to the 'Smart Oil' page which shows how full your tank is. Click the three dots on the top right, then Configure, then '# of Notifications'. Click the '+' sign to add each additional alert, and remember to hit save in the top right when done.