Smart Oil Gauge

Smart Oil Gauge has redefined
how we think about heating oil.

No more middle-of-the-night runouts. No more trips
to the basement. Know when you're low, and order
oil on your own terms - right from the app.

A Happy Family sitting on the couch ordering discount heating oil with FuelSnap
Smart Oil Gauge Wifi Icon

How It Works

Laptop with a video of a prospective FuelSnap customer

What our customers are saying...

Smart Oil Gauge FAQS

Where on my oil tank do I install the Smart Oil Gauge™?

The Smart Oil Gauge goes in one of the openings on the top of the fuel oil 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.

Are there any monthly fees?

No, there are no monthly oil tank monitoring fees.

What size opening on my oil tank does the Smart Oil Gauge fit into?

The Smart Oil Gauge fits into a 2" NPT opening on the top of an oil 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 fuel oil tanks with a smaller opening.

Can I check the oil tank level even when I'm not home?

Yes, you can check your home heating oil 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 your oil tank.

How can I tell if I have a WiFi connection at my oil tank?

Walk down to the oil tank and bring your smart phone, tablet, or laptop. Put your phone in 'Airplane Mode' and turn on WiFi only. See if you have internet access by opening up your browser. If the connection is not great, consider purchasing a WiFi range extender.

Is the Smart Oil Gauge intended for outdoor use?

The Smart Oil Gauge can be used indoors or outdoors. For outdoor installations, the white cap MUST be sealed with Teflon tape or other means to prevent moisture ingress. Expect readings to fluctuate with temperature changes.

What type of batteries does the Smart Oil Gauge take? How long do they last?

The Smart Oil Gauge takes two Saft LS14500 3.6 V lithium AA batteries, which are readily available online. The batteries generally last 1-2 years, depending on WiFi strength, Upload Interval, and other factors. Set your Upload Interval to 24 to maximize battery life.

What is the Upload Interval?

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.

What size oil tank is the Smart Oil Gauge designed for?

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

I just had my oil tank filled, but the Smart Oil Gauge is not reading completely full, why is this?

When an oil 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 oil tank to prevent over-filling. As a result, a 275 gallon tank typically holds around 250 gallons when completely full.

What tools are required for installation?

A standard 14” or larger pipe wrench is all that is required to remove the cap from the top of your oil tank and install the Smart Oil Gauge. Be sure to use pipe dope on the threads to create a seal. Do not use Teflon tape on the threads that mate with the oil tank, as this could break down and end up in the oil over time. It is OK to use Teflon tape to seal the white cap in place, as these threads are not exposed to oil.

I've changed my WiFi password / installed a new router, how can I change the password on my Smart Oil Gauge?

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!

How do I program alerts on my Smart Oil Gauge?

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. For detailed, step-by-step instructions, go to:

Technical Specifications

Fitting: 2” NPT (measures approximately 2.375”); 1.5” adapter available
Dimensions: 2.8 X 2.8 X 5.3”
Clearance Required Above Tank: 6.2” (To Allow Access To Batteries)
Shipping Weight: 1 Lb. 5 Oz
Batteries: SAFT LS14500 3.6V Lithium AA (2X) – Included And Replaceable
Sensor Type: Ultrasonic
Communication: WiFi – 2.4 GHz

Oil Tank Sizes


138, 220, 240, 275 or 330 gallon, single or side-by-side, vertical or horizontal, indoor or outdoor*

275 Vertical Home Heating Oil Tank
275 Horizontal Home Fuel Oil Tank
Dual 275 Vertical Home Heating Oil Tanks
Dual 275 Horizontal Home Fuel Oil Tanks

Note: most tanks feature 2” NPT fittings along the top. For tanks with 1.5” fittings, an adapter is required.

Roth Home Heating Oil Tanks with circle-backslash sign
NPT Fitting for Home Heating Oil Tank

*For outdoor installations, the white cap must be sealed with Teflon tape or other means to prevent moisture ingress. Failure to do so voids warranty. Expect level and consumption readings to vary with temperature changes.

01 275 Vertical (round side up) 275 / 1000
02 275 Horizontal (flat side up) 275 / 1000
05 330 Vertical 330 / 1250
06 330 Horizontal 330 / 1250
10 Roth 400L 110 / 400
11 Roth 620L 165 / 620
12 Roth 1000L 275 / 1000
13 Roth 1000LH 275 / 1000
20 120 Vertical 120 / 455
21 138 Vertical 138 / 525
22 138 Horizontal 138 / 525
23 220 Vertical 220 / 835
24 230 Vertical 230 / 870
25 230 Horizontal 230 / 870
26 240 Vertical 240 / 910
27 240 Horizontal 240 / 910
111 500 Horizontal Cylinder (48" diameter x 64" long) 500 / 1895
113 550 Horizontal Cylinder (48" diameter x 74" long) 580 / 2200

Ask Alexa

Family asking Alexa, "Alexa, ask Smart Oil Gauge how much Oil I have"

Ask Alexa how much
oil you have.

And when you'll need oil next...

To get started, open the Alexa app on your phone, and go to Skills. Search for Smart Oil Gauge to get the Smart Oil Gauge skill. You’ll need to sign in with your Smart Oil Gauge username and password to link the skill to your account.

To trigger the Smart Oil Gauge skill, always start by saying:

“Alexa, ask Smart Oil Gauge how much oil we have”

Then, you can follow-up with shorter commands, like:

“When will we need oil”

Tip: Consider changing the name of your oil tank from its default name (e.g. MyTank6541234) to something quicker for Alexa to say, like Rental Property. You can change the name of your tank in the Smart Oil Gauge app under settings or configure.