Description
Note:When you receive this sensor, the surface is covered with a blue protective film. When you peel off the film, you can see the stainless steel case. Working principle: This sensor uses the principle of laser light scattering. That is, the laser illuminates the suspended particles in the air to generate scattering, and at the same time, the scattered light is collected at a certain angle to obtain a curve in which the intensity of the scattered light changes with time. Furthermore, the microprocessor uses an algorithm based on the MIE theory to obtain the equivalent particle size of the particles and the number of particles of different particle sizes per unit volume.
ParameterIndexUnitMeasuring range0.3~1.0; 1.0~2.5; 2.5~10Micron (u m)Counting efficiency50%@0.3 um, 98%@ > : 0.5 um Weighing volume0.1L (L)Response time<=10Seconds (S)DC supply voltage5Volt (V)Maximum operating current120mA (nnA)Stand-by current100Microamp (mA)Data interface levelL <0.8 @3.3 H >2.7@3.3Volt (V)Working temperature -10~+50Celsius (°C)Operating humidity range0-99% Mean time between failures>3Year (Y)Size50x43x21Millimeter (mm)
PIN8PWMPWMPIN7NCModule reset signal / TTL level @3.3V, low resetPIN6RESETSerial port transmit pin / TTL level @3.3VPIN5TXDSerial Receiver Pin / TTL Level @3.3VPIN4RXDSet pin/TTL level @3.3V, high level or floatingPIN3SETFor normal working state, low level is sleep statePIN2GNDNegative power supplyPIN1NCVCCPower positive +5V
Output results: The main output is the unit concentration of the mass concentration of each concentration in the unit volume: micrograms per cubic meter.The output is divided into two states: active output and passive output. After the sensor is powered on, the default state is active output, that is, the sensor actively sends serial data to the host at a time interval of 200~800ms. The higher the concentration of particulate matter in the air, the shorter the time interval. The active output is divided into two modes: smooth mode and fast mode.
Package includes:
1 x Laser PM2.5 Sensor Module
