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What is a G Sensor on a Dash Cam?

Jun 05, 2023      View: 325

What is a G Sensor on a Dash Cam?

As we all know, a G-sensor is very important for a dashcam. Generally speaking, a G-sensor is used to register vibrations in the dashcam. It plays a key role in automatically triggering recording in vehicle collisions and emergency situations. By installing a G-Sensor on a dash cam, driving safety is higher, thus ensuring your safety on the road. If something unexpected happen, for example, if an accident falls on you, it will tell the dashcam and save the recording. What’s more, you are allowed to adjust the sensitivity of the G-sensor in the dashcam's menu to adapt to different driving conditions and vehicle types. In this article, we will introduce the definition, working principle, benefits of A G-sensor and so on. Let’s read on.

What is a G Sensor on a Dash Cam

G-Sensor is also called gravity sensor or acceleration sensor, which is usually used in the automotive field. It is based on Newton's second law and is able to detect changes in the acceleration of objects. When an object undergoes acceleration or deceleration, the G sensor can detect the change in acceleration and output an electrical signal. After installing the G sensor, it can detect accidents and save recordings of accidents, collisions, sudden braking or sharp turns. In addition, G sensors are also widely used in smartphones, tablets, medical equipment and aerospace, among others.

How Does a G sensor Work?

By measuring and detecting the acceleration and G-force of the vehicle, G-Sensor can detect and record the situation when the vehicle collides or accelerates/decelerates sharply. In the event of an accident, the gravity or acceleration of the vehicle changes suddenly. At this time, G-Sensor will automatically detect and record these changes, thus recording the situation before and after the accident.

How Do I Benefit from the G-sensor?

Accurate Accident Detection: G-Sensor provides accurate accident detection, which ensures that critical moments of accidents are recorded.

Evidence of insurance claims: G-sensor records are evidence of insurance claims.

Prevent fraudulent claims: In the case of fraudulent claims, G-sensor's records are your witnesses, protecting your interests.

Monitoring and analysis of driving behavior: G-sensor can monitor and analyze driving behavior, so that you can improve your driving habits, so as to ensure your safety on the road.

Sensitivity & Adjustability of the G-Sensor

The sensitivity and adjustability of the G-Sensor refers to how sensitive it is to changes in vehicle acceleration and G-force and the ability of the user to adjust the sensitivity as required.

Sensitivity Settings

You are allowed to change the sensitivity of the G-Sensor according to your needs and driving environment. Usually, G-Sensor sensitivity can be classified as high, medium or low, and some even have more options. The specific adjustment method can be found in the user manual.

Reasons for adjusting sensitivity

The sensitivity of G-Sensor should change with different driving conditions and each person's driving habits. On potholed roads, the vehicle vibrates violently. If the G-Sensor is too sensitive, it may give false alarms. If the G-Sensor is too sluggish, it may cause an accident or collision event.

Disadvantages of the G-Sensor

Although G-Sensor has many advantages, there are also some disadvantages.

  • It sometimes false positives.
  • Sensitivity adjustment is difficult.
  • It needs to be installed in the right place.
  • It can only detect movement in front and rear of the vehicle
  • Users need to manually delete false positive records to increase storage space.


G-Sensor is important in accident detection and recording. It automatically triggers recording for investigation and evidence collection and records the real situation of the accident and prevents false accidents. These records allow you to analyze and evaluate your driving habits to ensure your safety. All in all, G-Sensor allows you to drive with more confidence. It gives you a sense of security and protection, while preserving evidence for insurance claims and legal proceedings.

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  • What is G-sensor sensitivity?
  • G-sensor sensitivity refers to the threshold at which the G-sensor detects and reacts to acceleration, which determines the magnitude of acceleration that triggers the sensor to record. G-sensors typically allow the user to select a sensitivity level based on actual conditions to provide accurate detection and prevent false triggering.
  • What is the difference between accelerometer and G sensor?
  • Accelerometer and G-sensor may seem similar, but there are subtle differences. Accelerometers are used to measure linear and rotational acceleration (the rate of change of velocity over time). However, the G sensor measures the force of gravity acting on an object. It measures acceleration in terms of multiples of the acceleration due to gravity and is typically used in applications that measure forces related to gravity. To sum up, accelerometer is a general term for sensors that measure acceleration, and G sensor is a type of accelerometer.
  • How do you set a G sensor?
  • Setting up the G-sensor may vary by device or system. Below are the common steps for setting up a G-sensor. 1. Refer to the owner's manual first to learn how to set up the G-sensor. 2. Access the settings menu or interface, via buttons, touch screen or mobile app. 3. Choose the appropriate sensitivity by considering factors such as road conditions, driving style, and personal preference. 4. Test the performance of the G-sensor. You can accelerate or turn to adjust the sensitivity according to the reaction of the G sensor. Finally, setting up the G-sensor may vary by device or system. So you need to refer to the manufacturer's instructions.
  • Where is the G sensor on a car?
  • The G-sensor is typically housed within the accelerometer module or electronic control unit (ECU), which varies by car make and model. Sometimes it may be located in the stability control system or in the air bag control unit.