The sensor has a diameter of 33.3 mm without the adhesive.The part of the sensor that sits below the skin is approximately 6 mm.

Apply the sensor only on the back of your upper arm. See the package insert for a picture of the correct insertion site.

Refer to 'How to apply the Accu-Chek SmartGuide sensor'.

Yes, the sensor is protected against the effects of temporary immersion in water at a depth of 1 meter for up to 60 minutes (IP28).

No, the sensor must be removed before entering medical treatment areas with high-powered medical electric equipment, for example magnetic resonance imaging (MRI), computed tomography (CT), X-ray, radiotherapy, or diathermia.
However, you can wear the sensor in the full-body scanners used at the airport.

The sensor automatically stops working and stops sending data after the weartime of 14 days. About 24 hours and 2 hours before the sensor expires, the Accu-Chek SmartGuide app notifies you that the sensor expires soon and that you should apply a new one.

1. Start peeling off the adhesive pad on the flattened side of the sensor.

2. Inspect the back of the sensor: Make sure that the sensing element of the sensor has been completely removed from the insertion site after removing it. Check the insertion site by using your finger or check it visually. If the sensing element remained in your skin or the application site feels unusual (for example, painful, swollen or red) contact your healthcare professional.

Also refer to 'How to remove and dispose the sensor'.

Discard the sensor, as potentially infectious material, safely in a sharps bin following. For information on how to discard used components correctly, contact your local council or authority.

Other components of the pack can be discarded in domestic waste. A damaged applicator housing or an exposed sensor needle can cause injury. Discard sharp objects according to local regulations. Make sure that sharp objects don't cause injury to you and others.

Also refer to 'How to remove and dispose the sensor'.

Refer to 'How to pair the Accu-Chek SmartGuide sensor and app'.

To check that the CGM sensor delivers correct results, check your blood glucose with an accurate blood glucose meter at a time when your glucose does not change rapidly. To ensure that the sensor is working accurately, calibrate the sensor only in times of stable glucose levels and wash your hands before taking the blood sample from your fingertip.

If your feeling does not match the CGM values, check your blood glucose with an accurate blood glucose meter.
You can also change the sensor and/or contact your HCP when you doubt that your sensor is working properly.

Yes, the Accu-Chek SmartGuide sensor has an initial calibration routine, consisting of 2 steps.

The calibration routine consists of two steps:

After a warm-up time of 1 hour, the sensor is in Trend Mode, and sends CGM values to the app every 5 minutes. Don't use these initial CGM values to make therapy decisions, such as insulin dosing. 12 hours after insertion of the sensor, the app prompts you to calibrate.

Step 1: Check your blood glucose and enter the glucose value into the app. The sensor goes into Therapy Mode. CGM values can now be used to make therapy decisions, such as insulin dosing.

Step 2: 30 minutes to 3 hours later, check your blood glucose again and enter the glucose value into the app. This is to confirm the first measurement. Note: If step 2 is missed, the sensor returns to Trend Mode.

The calibration routine is completed for the sensor.

To calibrate your sensor:

1. Check your blood glucose with your blood glucose meter, according to the manufacturer's instructions.
2. Tap Calibrate Now on your Home screen.
3. Enter the glucose value from your blood glucose meter in the Calibrate screen. The glucose value should be entered no later than 3 minutes after performing the test.
4. Tap Save.
5. Check that you entered the same glucose value into the app that was displayed on your blood glucose meter and tap Confirm. 

The glucose measurements of the sensor are more accurate if you calibrate at a point in time when your blood glucose level is relatively stable.

Do not calibrate shortly after a meal, after insulin administration, or after physical activity, and avoid environments with very hot or very cold temperatures, or rapidly changing temperatures.

If you accidentally entered an incorrect value, tap Cancel and enter the correct value.

Your sensor is calibrated.

The sensor requires calibration to provide you with the most accurate readings possible:

• An uncalibrated sensor will be in Trend Mode. You can see CGM values but should not use them for therapy decisions.
• A calibrated sensor will be in Therapy Mode. You can use the confirmed values to make decisions (such as insulin dosing).

The sensor mode appears under the CGM value on the Home screen.

There are 2 modes of CGM values: Trend Mode and Therapy Mode. The mode the sensor is currently in is indicated directly below the CGM value on the Home screen.

When the sensor is in Trend Mode the following applies:

• CGM values should not be used to make therapy decisions, such as insulin dosing.
• CGM values can be used only to see trends and as a general reference.
• To make therapy decisions, such as insulin dosing, test your blood glucose with your blood glucose meter.

When the sensor in is Therapy Mode the following applies:

• CGM values can be used to make therapy decisions, such as insulin dosing.