SenTec

SEM224 Air quality PM2.5 PM10 sensor

SEM224 industrial grade general particle concentration transmitter adopts the principle of laser scattering measurement and sieves through unique data dual-frequency acquisition technology to obtain the number of particles of equivalent particle size per unit volume, and uses a scientific and unique algorithm. Calculate the mass concentration of the particles with the equivalent particle size per unit volume, and output the data through the ModBus-RTU protocol with the 485 interface. It can be used in outdoor weather stations, dust monitoring, libraries, archives, industrial plants and other places that require PM2.5 or PM10 concentration monitoring.

SEM224 industrial grade general particle concentration transmitter adopts the principle of laser scattering measurement and sieves through unique data dual-frequency acquisition technology to obtain the number of particles of equivalent particle size per unit volume, and uses a scientific and unique algorithm. Calculate the mass concentration of the particles with the equivalent particle size per unit volume, and output the data through the ModBus-RTU protocol with the 485 interface. It can be used in outdoor weather stations, dust monitoring, libraries, archives, industrial plants and other places that require PM2.5 or PM10 concentration monitoring.

Parameters

DC power supply (default)10~30V DC
Power consumptionRS485 output0.4W
Current output/Voltage output1.2W
Accuracy±10% (@500ug/m3,60%RH,25℃)
RangePM2.5: 0~1000ug/m3, PM10: 0~1000ug/m3
Resolution1ug/m3
Response time≤90S
Signal output485 signal output, 4~20mA current output, 0~5V/0~10V voltage output
Warm-up time≤2min
Transmitter circuit operating temperature and humidity-20℃~+60℃, 0%RH~95%RH non-condensing
load capacityVoltage outputOutput resistance≤250Ω
Current output≤600Ω
Communication Interface485 communication (modbus) protocol

Baud rate: 2400, 4800 (default), 9600

Data bit length: 8 bits

Parity check method: none

Stop bit length: 1 bit

Default ModBus communication address: 1

Support function code: 03

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