Grove PIR Sensor: find out how the passive infrared technology works
What is a PIR sensor? It’s a volumetric motion sensor able to detect the infrared radiation emitted by any person or animal moving within its detection range.
The detector measures this infrared radiation and translates its detection by a high output signal on its SIG pin.
Using the SEN32357P passive infrared sensor
Here, this presence detector has been integrated into a module compatible with the Grove interface.
It’s a small sensor that is extremely simple to both install and use. All you have to do is connect it to your board, and possibly adjust its parameters using the two potentiometers integrated into the circuit.
This type of PIR sensor is known to offer some considerable advantages. First, it is not sensitive to noise and will therefore react only to the actual presence of a human or animal within its detection range.
In addition, its beams are invisible and cause no reflection. It is therefore the ideal accessory for building a DIY detection system, for example when filming an animal documentary, for a remote surveillance system or indeed any other type of surveillance.
Please note that this type of sensor is quite sensitive to sudden changes in temperature.
Technical specifications of the SEN32357P Grove PIR Sensor
- Grove-compatible module (Base Shield or Mega Shield)
- Adjustable range and response time
- Range: 10 cm to 6 m max.
- Response time: 0.3–25 sec.
- Detection angle: 120°
- Supply: 3–5 Vdc
- Consumption: 150 uA
- Dimensions: 20 x 40 mm
- Operating temperature: -20 to 70 °C
Resources for the SEN32357P Grove PIR Sensor
Below are some very useful links that will make it even easier for you to install and use the passive infrared sensor:
And finally an introduction to the Grove system: