> **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 # SparkFun Air Quality Sensor - SGP40 (Qwiic) **Type:** Product page · **SKU:** SEN-18345 · **Brand:** [Sparkfun](https://core-electronics.com.au/brands/sparkfun-australia) **Page:** https://core-electronics.com.au/sparkfun-air-quality-sensor-sgp40-qwiic.html ([markdown](https://core-electronics.com.au/sparkfun-air-quality-sensor-sgp40-qwiic.html.md)) The SparkFun SGP40 Air Quality Sensor provides a measurement of the quality of the air in your room or house. The SGP40 is based on Sensirion's CMOSens® technology... ## Pricing - **Price:** $32.90 (inc GST) — $29.91 AUD, exc GST - **Quantity discounts:** 5+ $29.01 (exc GST) · 25+ $28.42 (exc GST) · 100+ $27.22 (exc GST) ## Availability & dispatch - Available with a lead time — expect dispatch between Sep 02 and Sep 08. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=SEN-18345:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart. - **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/SEN-18345:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.) - **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 SparkFun SGP40 Air Quality Sensor provides a measurement of the quality of the air in your room or house. The SGP40 is based on Sensirion's CMOSens® technology and uses a metal oxide (MOx) sensor with a temperature controlled micro hotplate and provides a humidity-compensated volatile organic compound (VOC) based indoor air quality signal. Both the sensing element and VOC Algorithm feature an unmatched robustness against contaminating gases present in real world applications enabling a unique long term stability as well as low drift and device to device variation. The SGP40 does not return specific concentrations or VOC gases. Instead, it outputs a digital value based on common VOC gases present in an indoor environment and this value can be combined with Sensirion's VOC Index Algorithm to detect the relative intensity of VOC events in relation to the average readings in a 24hr period. Think of the SGP40 as a sensitive electronic nose for detecting VOCs in a room. The SGP40 communicates via I2C so naturally Sparkfun broke out the pins on the sensor to Qwiic connectors so you can easily connect it to SparkFun's ever growing Qwiic Ecosystem! *The [SparkFun Qwiic Connect System](https://www.sparkfun.com/qwiic) is an ecosystem of I2C sensors, actuators, shields and cables that make prototyping faster and less prone to error. All Qwiic-enabled boards use a common 1mm pitch, 4-pin JST connector. This reduces the amount of required PCB space, and polarized connections mean you can't hook it up wrong.* [Get Started with the SGP40 Air Quality Sensor Hookup Guide](https://learn.sparkfun.com/tutorials/air-quality-sensor---sgp40-qwiic-hookup-guide)**Features** - Uses I2C interface (Qwiic-enabled) - I2C Address: **0x59** - 2x Qwiic connectors - Operating voltage range: - **1.7V - 3.6V** (Typ. **3.3V**) - The Qwiic interface provides **3.3V** - Typical current consumption: - **2.6mA** during continuous operation (at 3.3V) - **34µA** when idle (heater off) - Output signal: - Digital raw value (SRAW): 0 - 65535 ticks - Digital processed value (VOC Index): 0 - 500 VOC Index points - Switch-on behavior: - Time until reliably detecting VOC events: <60s - Time until specifications are met: <1h - Recommended sampling interval: - VOC Index: 1s - SRAW: 0.5s - 10s (Typ. 1s) **Documents** - [Schematic](https://core-electronics.com.au/attachments/localcontent/Qwiic_SGP40-Schematic_13131054d18.pdf) - [Eagle Files](https://core-electronics.com.au/attachments/localcontent/SparkFun_Qwiic_SGP40_169923a909e.zip) - [Board Dimensions](https://core-electronics.com.au/attachments/localcontent/SparkFun_Qwiic_SGP40-Dimensions_15916289b7e.png) - [Hookup Guide](https://learn.sparkfun.com/tutorials/air-quality-sensor---sgp40-qwiic-hookup-guide) - [Sensirion SGP40 Datasheet](https://core-electronics.com.au/attachments/localcontent/Sensirion_Gas_Sensors_SGP40_Datasheet_127696a7133.pdf) - [Sensirion VOC Index for Experts](https://core-electronics.com.au/attachments/localcontent/GAS_AN_SGP40_VOC_Index_for_Experts_D1_14874004f5b.pdf) - [Sensirion SGP40 Design In Guide](https://core-electronics.com.au/attachments/localcontent/GAS_SGP4x_Design-In_Guide_D1_3117421cf65.pdf) - [SGP40 Quick Testing Guide](https://core-electronics.com.au/attachments/localcontent/Sensirion_Gas_Sensors_Datasheet_GAS_AN_SGP40_Quick_Testing_Guide_D1_520054b5109.pdf) - [Qwiic Information Page](https://www.sparkfun.com/qwiic) - [Arduino Library](https://github.com/sparkfun/SparkFun_SGP40_Arduino_Library) - [Python Package](https://github.com/sparkfun/Qwiic_SGP40_Py) - [GitHub Hardware Repo](https://github.com/sparkfunX/SparkX_Air_Quality_Sensor-SGP40) ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/1/8/18345-sparkfun_air_quality_sensor_breakout_-_sgp40__qwiic_-01.jpg)