CGM Blood Glucose Sensors - Continuous Monitoring Without Finger Pricks
Understand the differences between available models and compare wear time, compatibility, alerts and accuracy before choosing.
What is a CGM glucose sensor?
A CGM (Continuous Glucose Monitoring) sensor is a small, portable medical device applied to the skin that continuously measures glucose levels in your body without requiring finger pricks.
Unlike traditional glucometers that provide a single measurement at a point in time, the CGM sensor shows you a complete picture of your blood glucose - with real-time graphs, trends, alerts for values that are too high or too low, and detailed reports you can share with your doctor.
The sensor is replaced every 7-15 days (depending on the model) and connects to a mobile app via Bluetooth or NFC. It's discreet, comfortable, and fundamentally changes how people with diabetes manage their health.
CGM sensor comparison: functions and features
Compare models in one place, then check current prices and stock in the shopping category.
| Product | ||||||
|---|---|---|---|---|---|---|
| Brand | MicroTech Medical | Teljane Medical | Sibionics | Roche | Sinocare | Sibionics |
| Rating | ★4.9(33) | — | ★5.0(1) | ★5.0(1) | — | — |
| Wear time | 15 zile | 21 de zile | 14 zile | 14 zile | 15 zile | 14 zile |
| Warm-up time | — | 15 minute | — | — | — | — |
| EU certification | Da | Da | Da | Da | Da | Da |
| Bluetooth connectivity | Da | Da | Da | Da (BLE 5.0) | Da | Da |
| Water resistance | IP68 | IP58 | IP28 | IP28 | IP28 | IP38 |
| Patch | Da | Yes | Da | Da | Da | Da |
| MARD | 8.66% | 8,2% | 8.83% | 9.2% | 8.71% | 8.83% |
| Dimensions | 22mm x 4.22mm | 27,5 × 20 × 4,5 mm | 33.5mm x 20.0mm x 5.3mm | 33.3mm diam. x 5.9mm | 32mm diam. x 5.7mm | 24.8 x 17.8 x 2.9mm |
| Weight | 2.16 g | - | 3.84 g | ~5 g | - | 1.7 g |
| View details | View details | View details | View details | View details | View details |
How to Choose the Right CGM Sensor?
Usage duration
Sensors available with 7, 14, or 15-day duration. Choose based on your lifestyle and how often you want to change the sensor.
App compatibility
Check if the sensor is compatible with your phone. Most work with iOS and Android, but some models have specific requirements.
Accuracy, alerts and personal needs
Compare stated accuracy, alert types and data transmission. The right model depends on treatment, phone compatibility and medical advice.
Why Use a Continuous Monitoring Sensor?
No painful finger pricks
The sensor is applied once and continuously monitors blood glucose, eliminating the need for finger prick tests multiple times a day.
24/7 monitoring
You receive real-time blood glucose data, including during sleep. It detects trends and fluctuations that traditional tests miss.
Real-time alerts
You receive phone notifications when blood sugar drops or rises too much. A safety net that works 24/7, even at night.
Data for your doctor
Automatically generated reports give you a complete picture of blood glucose over days or weeks, facilitating collaboration with your endocrinologist.
How does a sensor subscription work?
A subscription schedules recurring deliveries based on the number of sensors and selected interval. Review the available options before deciding whether it suits you.
See how it works
Dr. Daniela Petrache
Medical Specialist
The information on this page has been reviewed by a medical professional for accuracy and relevance. The content is for informational purposes and does not replace professional medical advice.
Features and indications differ between models. Choose the sensor together with a medical professional when the data is used for treatment decisions.
Frequently Asked Questions
How long does a CGM sensor last?
Duration varies: LinX CGM lasts 15 days, Sibionics GS1 and Accu-Chek SmartGuide last 14 days each, while Sinocare iCan i3 can be used up to 15 days.
Does the CGM sensor require finger pricks?
No. The CGM sensor is applied to the skin with a simple, painless applicator. A thin filament reads glucose levels from interstitial fluid.
Which CGM sensor is the best?
It depends on your needs. LinX CGM offers the best value. Sibionics GS3 stands out for durability. Compare in the table above.
Can I use a CGM sensor for children?
Yes, CGM sensors can be used by children under adult supervision. Consult the pediatrician for specific recommendations.
How does continuous glucose monitoring work?
A small sensor is applied to the arm or abdomen. It measures glucose levels every 1-5 minutes and transmits data wirelessly to a phone app.
Is the CGM sensor waterproof?
Most CGM sensors are water-resistant (IP27 or IP28) and can be used in the shower or while swimming.
Do I need a prescription for a CGM sensor?
No, CGM sensors can be purchased without a prescription in Romania. They are personal-use medical devices.
What is the difference between a CGM sensor and a traditional glucometer?
A traditional glucometer measures blood sugar at a single point, requiring a blood drop. A CGM sensor monitors continuously, providing graphs, trends, and automatic alerts.
Have you found the right model?
See available products, current prices and stock in the dedicated shopping category.
View products, prices and stock