# Pololu Carrier for MQ Gas Sensors (Bare PCB Only) **Type:** Product page · **SKU:** POLOLU-1479 · **Brand:** [Pololu](https://core-electronics.com.au/brands/pololu-australia) **Page:** https://core-electronics.com.au/pololu-carrier-for-mq-gas-sensors-bare-pcb-only.html ([markdown](https://core-electronics.com.au/pololu-carrier-for-mq-gas-sensors-bare-pcb-only.html.md)) This carrier board is designed to work with any of the MQ-series gas sensors, simplifying the interface from 6 to 3 pins—ground, power and analog voltage output—that are broken out with a 0.1" spacing, making the board compatible with 0.1" headers and standard breadboards and perfboards. This board has two mounting holes and provides convenient pads for mounting the gas sensor’s required sensitivity-setting resistor. ## Pricing - **Price:** $2.05 (inc GST) — $1.86 AUD, exc GST - **Quantity discounts:** 10+ $1.79 (exc GST) · 25+ $1.74 (exc GST) ## Availability & dispatch - In stock, ships same business day if ordered before 2PM (Australia/Sydney). - We can dispatch 2 today, and up to 200 more in 4–7 days. ## Description | [![](https://core-electronics.com.au/attachments/localcontent/0J2251_21497ada133.jpg)](https://core-electronics.com.au/attachments/localcontent/0J2251_98598058b7c.jpg) | |---| This breakout board is designed to work with any of the MQ-series [gas sensors](https://core-electronics.com.au/category/83/gas-sensors), simplifying the interface from 6 to 3 pins—ground, +5V VCC, and an analog voltage output—that are broken out with a 0.1" spacing, making the board compatible with [0.1" headers](https://core-electronics.com.au/0-100-2-54-mm-breakaway-male-header-1x40-pin-straight.html) and standard [breadboards](https://core-electronics.com.au/prototyping/breadboards.html) and perfboards. This board has two mounting holes and provides convenient pads for mounting the gas sensor’s required sensitivity-setting resistor (referred to as RL in the sensor datasheet). All of the board’s traces are on the same side of the PCB, making it easy to see how the pads are connected. The two mounting holes are intended to be used with #2 screws (not included). Note that Pololu also offer an [alternate gas sensor breakout board](https://core-electronics.com.au/sparkfun-carrier-for-mq-gas-sensors-bare-pcb-only.html) that is more compact, with a diameter equal to that of the smaller gas sensor and the broken-out pins beneath the sensor. | [![](https://core-electronics.com.au/attachments/localcontent/0J2250_129979c075f.jpg)](https://core-electronics.com.au/attachments/localcontent/0J2250_250529d409a.jpg) | |---| **Connections** Connect VCC to 5 V, GND to ground, and OUT to an analog-to-digital converter (ADC). The board has two pairs of through-hole pins for the required (but not included) sensitivity-selecting resistor RL, providing two mounting options—horizontal or vertical—between GND and OUT as shown in the pictures below. The resistance of RL should be calculated using the datasheet for your particular gas sensor. The MQ gas sensors have light to no polarity, so the gas sensor will work with the board all four ways it fits into the 6 pins (there are two possible orientations on each side of the board). | \| [![](https://core-electronics.com.au/attachments/localcontent/0J2252_18471a8eae3.jpg)](https://core-electronics.com.au/attachments/localcontent/0J2252_31366554279.jpg) \| \|---\| \| Pololu MQ gas sensor carrier with sensitivity-setting resistor soldered in the horizontal orientation. \| | \| [![](https://core-electronics.com.au/attachments/localcontent/0J2254_168116be3d8.jpg)](https://core-electronics.com.au/attachments/localcontent/0J2254_19156102648.jpg) \| \|---\|---\| \| Pololu MQ gas sensor carrier with sensitivity-setting resistor soldered in the vertical orientation. \| | |---| The picture to the right above shows a board with a 3×1 [0.1" right-angle male header](https://core-electronics.com.au/0-100-2-54-mm-breakaway-male-header-1x40-pin-right-angle.html) soldered to it, which allows a standard [servo cable](https://core-electronics.com.au/servo-extension-cable-12-female-female.html) to be used to connect the board to your project. **Note:** This product consists of the PCB by itself; it does not include a gas sensor, sensitivity resistor, header pins, or any additional hardware. **People often buy this product together with:** | [![Carbon Monoxide & Flammable Gas Sensor MQ-9](https://core-electronics.com.au/attachments/localcontent/0J2090_4341adaf02.jpg)](https://core-electronics.com.au/carbon-monoxide-flammable-gas-sensor-mq-9.html) | [Carbon Monoxide & Flammable Gas Sensor MQ-9](https://core-electronics.com.au/carbon-monoxide-flammable-gas-sensor-mq-9.html) | |---|---| **Dimensions** | Size: | 0.7 x 0.95" | |---|---| **Identifying markings** | PCB dev codes: | gs01a | |---|---| | Other PCB markings: | 0J1924 | **File downloads** - **[Dimension diagram of the Pololu Carrier for MQ Gas Sensors (Bare PCB Only)](https://core-electronics.com.au/attachments/localcontent/pololu-carrier-for-mq-gas-sensors-dimensions_27906aab235.pdf) (279k pdf)** - **3D model of the Pololu Carrier for MQ Gas Sensors (Bare PCB Only) (2MB step)** - **Drill guide for the Pololu Carrier for MQ Gas Sensors (Bare PCB Only) (15k dxf)** This DXF drawing shows the locations of all of the board’s holes. ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/p/o/pololu_carrier_for_mq_gas_sensors__bare_pcb_only___pololu_1479__00.jpg)