Infrared Thermopile Sensors

IR sensor in office environment for people detection

An infrared (IR) thermopile sensor can be used for tracking movement and temperature of people and objects.

The infrared sensor is composed of an 8 × 8 (64) pixel thermopile array with a 60° field of view. It comes with a built-in lens with 60° viewing angle and measures actual temperature as well as temperature gradients within its viewing area.

The sensor works by detecting infrared in each of the 64 frames and converting it to temperature. The image of the object being measured is divided into a 64-frame grid. The temperature distribution is displayed in corresponding colors on the individual frames. Application is suitable for operating temperatures from 0 to 80 °C, the measuring range is from -20 to 100°C.

data enhancement using infrared sensor

Based on thermopile technology, the sensor can detect the direction of moving people and objects that are up to 7 meters away. Its coordinated array of sensing elements can even detect multiple people or objects moving in different directions. At close proximity, the sensor is capable of detecting hand movements for simple gesture control.

Continuous detection of people/objects in a room may require several cameras aimed in different directions. Also, infrared signals can be blocked by physical items (e.g. glass, wood, human body), which has to be taken into consideration for the installation.


Applications of Data Enhancement Using Infrared Sensors

The ability to detect moving and motionless people/objects, movement direction and measure temperature enables using the IR sensor in a wide variety of applications.


The sensor can be used for positive environmental contributions and power savings. Thermopile arrays allow people counting, supported by Wi-Fi monitoring. Matching office automation solutions facilitate the adaption of heating, air conditioning, and light control to the actual use of a room.

Software solution used: Indoor Tracking, Geo-Based Processes
Sensors used: Infrared, Wi-Fi


IR sensors that are installed on the ceiling can be used for elderly tracking and fall detection, integrated into a warning system and ensuring fast medical aid. Detecting a fall is carried out on the basis of changes in the thermal image of the person being monitored in conjunction with the accelerometer of a beacon wristband.

Software solution used: Indoor Tracking, Geo-Based Processes
Sensors used: Infrared, Bluetooth Low Energy (beacons)
Example of use: Indoor Tracking of Patients in Hospitals

Using thermopile sensors enables detecting unauthorized people or people near dangerous machines. Temperature monitoring allows operators to anticipate the impending danger and take preventive measures.

Software solution used: Indoor Tracking, Geo-Based Processes
Sensors used: Infrared, Bluetooth Low Energy (beacons)

Presence detection at night using a combination of infrared sensors and Wi-Fi monitoring provides effective protection against burglary.

Software solution used: Indoor Tracking, Geo-Based Processes
Sensors used: Infrared, Wi-Fi