CGM & Sensors Product Support

What is a glucose sensor?

A glucose sensor is a tiny electrode that measures your glucose levels. It sits under the skin in your interstitial fluid. Glucose sensors are easily inserted using an automatic insertion device: a needle is used to insert the glucose sensor. The needle is then removed leaving just the tiny flexible electrode under the skin. The glucose sensor is then connected to a transmitter so that readings can be transmitted to your insulin pump.

Do I still need to do fingerstick readings if I use glucose sensors?

When using the MiniMed™ 780G with Guardian™ 4 sensor, there are no fingersticks required with SmartGuard™ technology**. There are times when it is appropriate to enter a fingerstick BG into the MiniMed™ 780G system, or when the system may sometimes request one. You should use a reading from a BG meter instead of a sensor glucose reading in certain cases. Please review the "CGM - insertion, programming and quick start video" above to learn more. When using the Guardian™ Sensor (3), calibrations in the form of a BG by fingerstick are required at least every 12 hours. ​When using either sensor not in SmartGuard™ tech, a BG reading should be used before making treatment decisions.

_{**A blood glucose (BG) reading is needed to enter SmartGuard™. If symptoms don’t match alerts & readings, use a BG meter. Refer to user guide.}

Where should I wear my glucose sensor?

Although indicated in multiple areas depending on age, it has been found that wearing the Guardian™ 4 sensor on the back of the upper arm may provide the best sensor life and experience. Therefore, it is the recommendation that patients first try insertion on the back of the arm, if they are able to do so.

How long do sensors last? Do they expire?

Both the Guardian™ 4 sensor and Guardian™ Sensor (3) can be worn for up to 7 days. Remember, the transmitter is re-usable and should be re-charged after each sensor wear.

What is the warranty on my transmitter?

Both the Guardian™ 4 transmitter and Guardian™ Link (3) Transmitters come with a 12-month warranty.

What type of batteries does the transmitter use?

Both the Guardian™ 4 transmitter and Guardian™ Link (3) Transmitters have a self-­contained battery, which can be recharged using the charger supplied, but cannot be changed. As it has a self­contained battery, the transmitter should be disposed of, or recycled, in accordance with local governing ordinances and recycling guidelines.

I have insurance - can you tell me if sensors are covered?

Yes.  We can help with our complementary insurance verification service.  Please  call us at 1-800-284-4416 (choose option 2 for sensor insurance coverage) or complete the online form to get started.

How can I replace a lost sensor?

Request a replacement through our Sensor Replacement Form

Alternatively you can call our HelpLine at 1-800-284-4416, option 1 for troubleshooting and replacements of lost sensors.