> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt

# Gravity: SGP40 Air Quality Sensor

**Type:** Product page · **SKU:** SEN0394 · **Brand:** [DFRobot](https://core-electronics.com.au/brands/dfrobot-australia)
**Page:** https://core-electronics.com.au/gravity-sgp40-air-quality-sensor.html ([markdown](https://core-electronics.com.au/gravity-sgp40-air-quality-sensor.html.md))

The SGP40 Air Quality sensor adopts the new SGP40 digital VOC sensor chip launched by the well-known Sensirion. Based on the Sensirion’s CMOSens® technology, the...

## Pricing

- **Price:** $23.80 (inc GST) — $21.64 AUD, exc GST
- **Quantity discounts:** 6+ $20.55 (exc GST) · 12+ $19.69 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 2 today, and up to 100 more in 8–12 days.

## How to buy

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- **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there.
- **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works)
- **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt
## Description

The SGP40 Air Quality sensor adopts the new SGP40 digital VOC sensor chip launched by the well-known Sensirion. Based on the Sensirion’s CMOSens® technology, the SGP40 offers a complete sensor system on a single chip, a temperature-controlled micro-hotplate and a humidity-compensated indoor air quality signal. In combination with Sensirion’s powerful VOC algorithm, the sensor signal can be directly used to evaluate indoor air quality. It features low power(2.6mA), fast response(2s) and small size. The data from the sensor can be directly used to evaluate air quality without calibration.

Integrated with an easy-to-connect Gravity interface, this Gravity SGP40 Air Quality sensor is very suitable for indoor projects that will be used for a long time, such as refitting air purifiers, kitchen hoods, etc. Besides, we provide you with C and Python libraries for use with different main-controllers.

**Note:** VOC index is obtained by converting the detected ethanol equivalent in air.

![](https://core-electronics.com.au/media/wysiwyg/product_images/Product-SEN0394.jpg)

### Features

- Ultra-low power consumption(2.6mA)
- Built-in temperature and humidity compensation, no need to calibrate
- VOC index for direct air quality indication

### Applications

- Air Purifiers
- Kitchen Hoods
- Demand-controlled Ventilation
- Thermostats
- Indoor Air Quality Monitoring

### Specification

- Power Supply: 3.3V~5V
- Operating Current: 2.6mA
- Preheat Time: 10S
- Response Time: 2S
- Communication: I2C
- I2C Address: 0x59
- Operating Temperature Range: -10°C ~ 50°C
- Storage Temperature Range: 5°C ~ 30°C
- Operating Humidity Range: 0%RH~90%RH
- VOC Index: 0-500
- Measuring Range: 0-1000ppm(Ethanol Equivalent)
- Dimension: 20\*22mm/ 0.79\*0.87”

### Documents

- [Product wiki](https://wiki.dfrobot.com/Gravity_SGP40_Air_Quality_Sensor_SKU_SEN0394)

### Parts List

- Gravity: SGP40 Air Quality Sensor x1
- Gravity-4P I2C/UART Sensor Cable x1

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/s/e/sen0394.jpg)