SGP40 VOC Sensor Sensirion

The RAK12047 is an indoor air quality sensor based on the Sensirion SGP40 for VOC measurements.

It's digital gas sensor is designed or easy integration into air purifiers or demand-controlled ventilation systems.

The output signal can be directly processed by Sensirion’s powerful Gas Index Algorithm to translate the raw signal into a VOC Index.

This is supported by Sensirions open source libraries.

The Sensirion algorithms work best when beside of the RAK12047's signal it is provided with air temperature and humidity.

This can be done by combining the RAK12047 with our temperature and humidity sensor like the RAK1901 or RAK1906.

Specifications

#Overview

Figure 2 shows the mounting mechanism of the RAK12047 module on a WisBlock Base (opens new window)board. The RAK12047 module can be mounted on the slots: A, B, C, D, E, & F.

Figure 2: RAK12047 WisBlock VOC Sensor Mounting

#Hardware

The hardware specification is categorized into five parts. It shows the chipset of the module and discusses the pinouts, sensors, and the corresponding functions and diagrams. It also covers the electrical and mechanical parameters that include the tabular data of the functionalities and standard values of the RAK12047 WisBlock VOC Sensor.

#Chipset

#Pin Definition

The RAK12047 WisBlock VOC Sensor Module comprises a standard WisBlock connector. The WisBlock connector allows the RAK12047 module to be mounted to a WisBlock Base board. The pin order of the connector and the pinout definition is shown in Figure 3.

Figure 3: RAK12047 WisBlock VOC Sensor Pinout Diagram

#Electrical Characteristics

#Absolute Maximum Ratings

#Power Supply Ratings

#Mechanical Characteristics

#Board Dimensions

Figure 4 shows the dimensions and the mechanic drawing of the RAK12047 module.

Figure 4: RAK12047 WisBlock VOC Sensor Mechanical Drawing

#WisBlock Connector PCB Layout

Figure 5: WisBlock Connector PCB footprint and recommendations

#Schematic Diagram

Figure 6: RAK12047 WisBlock VOC Sensor schematic