The LAQ4 is a LoRaWAN Air Quality sensing element for internet of Things solution. it’s designed to measure the surrounding environment parameters include: TVOC(Total Volatile Organic Compound), eCO2(equivalent CO2), temperature and relative air humidness, and so transfer to IoT server via LoRaWAN wireless protocol. IAQ (Indoor Air Quality) is extremely vital issue for indoor activity and human life. VOC(Volatile Organic Compound) ar emitted as gases from certain solids or liquids and that they are the most supply for poor indoor air quality. LAQ4 provides the trend for IAQ activity and, like all other TVOC sensors, LAQ4 needs standardization for additional accuracy activity on TVOC and eCO2. LAQ4 supports temperature and humidness alarm feature, user will get alarm for immediate notice. LAQ4 supports Datalog feature, User will retrieve the sensing element data from LoRaWAN commands. every LAQ4 is pre-load with a group of distinctive keys for LoRaWAN registration, register these keys to local LoRaWAN server and it’ll auto connect once activation.

Specifications:

Features:
• SX1276 IoT Device
• Support Class: Class A
• Ultra-low power consumption
• Monitor TVOC/ eCO2/ Temperature and Relative Humidity
• Temperature & Humidity alarm
• Frequency: 865 – 867 MHz
• AT Commands to change parameters
• Auto adjust timing. Remote retrieve data
• Uplink on periodically or Interrupt
• Downlink to change configure
• 168 dB maximum link budget.
• High sensitivity: down to -148 dBm.
• Bullet-proof front end: IIP3 = -12.5 dBm.
• Excellent blocking immunity.
• 127 dB Dynamic Range RSSI.

Common DC Characteristics:
• Supply Voltage: built in 4000mAh Li-SOCI2 battery
• Operating Temperature: -40 ~ 85°C

TVOC Sensor:
• 0ppb to 29206 ppb. Values outside this range are clipped
• Temperature and Humidity Compensation

eCO2 Sensor:
• 400ppm to 32768 ppm. Values outside this range are clipped
• Note: eCO2 (equivalent calculated carbon-dioxide) is different things vs the real CO2. It is calculated by TVOC value.
• Temperature and Humidity Compensation

Temperature Sensor:
• Range: -40 to + 80°C
• Accuracy: Typ ±0.3 @ 0-90 °C
• Resolution: 0.01°C
• Long Term Shift: Typ <0.02 °C/yr Relative Humidity Sensor: • Range: 0 ~ 99.9% RH • Accuracy: ± 3%RH ( 0 ~ 100%RH) • Resolution: 0.04% RH • Long Term Shift: <0.25 %RH/yr Power Consumption: • Deep Sleep Mode / IDLE Mode: 9uA • Sampling Mode: 11.8mA @ 2s for every 60 seconds. • Long Range IoT Transmit Mode: 125mA. Battery Life: • 7 ~ 10 months. Applications • Smart Buildings & Home Automation • Logistics and Supply Chain Management • Smart Green House • Smart Cities • Smart Factory