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ANSI Single Strand Roller Chain, ANSI #25, 1/4" pitch
TD-101-025

Our high quality ANSI#25 steel roller chain is very durable and can be used with our ANSI #25 roller chain sprockets.

$0.00
Special Order
2-4 days
3 Pin Crimp Headers
TE-016-000

This is 2 3-pin connectors/receptacles. Crimping terminals are also included.

$3.99
11 Ready to Ship!
SuperDroid Robots Gas Sensors
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Electrical & Controls  >  Sensors  >  Gas Sensors

Gas Sensors

Want to build your own breathalyzer? This variety of semiconductor gas sensors makes it possible to measure concentrations of gasses such as alcohol, methane, propane, butane, and carbon monoxide.


The answers to the most common questions we get can be found on our support pages. Visit our Sensor Support page for more information about the types of sensors we carry and the differences between them.


Looking for some sample code? Please visit us on GitHub.

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Pololu Carbon Monoxide & Flammable Gas Sensor MQ-9
This semiconductor gas sensor detects the presence of Carbon Monoxide at concentrations from 10 to 1,000 ppm and combustible gas from 100 to 10,000 ppm.
TS-056-MQ9
$5.95
7 Ready to Ship!
Pololu Carbon Monoxide Gas Sensor MQ-7
This semiconductor gas sensor detects the presence of Carbon Monoxide at concentrations from 10 to 10,000 ppm. The sensor’s simple analog voltage interface requires only one analog input pin from your microcontroller.
TS-056-MQ7
$4.95
8 Ready to Ship!
Pololu LPG / Isobutane / Propane Gas Sensor MQ-6
This semiconductor gas sensor detects the presence of LPG, isobutane, and propane at concentrations from 300 to 10,000 ppm. The sensor’s simple analog voltage interface requires only one analog input pin from your microcontroller.
TS-056-MQ6
$4.95
9 Ready to Ship!
Pololu Methane Gas Sensor MQ-4
This semiconductor gas sensor detects the presence of methane (CNG) gas at concentrations from 300 ppm to 10,000 ppm, a range suitable for detecting gas leaks.
TS-056-MQ4
$4.95
9 Ready to Ship!
Pololu Alcohol Gas Sensor MQ-3
This semiconductor gas sensor detects the presence of alcohol gas at concentrations from 0.04 mg/L to 4 mg/L, a range suitable for making a breathalyzer.
TS-056-MQ3
$4.49
10 Ready to Ship!
Pololu Flammable Gas & Smoke Sensor MQ-2
This semiconductor gas sensor detects the presence of combustible gas and smoke at concentrations from 300 to 10,000 ppm. The sensor's simple analog voltage interface requires only one analog input pin from your microcontroller.
TS-056-MQ2
$3.95
7 Ready to Ship!
Pololu MQ Gas Sensor Carrier
This carrier board is designed to work with any of the MQ-series "gas sensors".
TS-056-MQ0
$0.95
42 Ready to Ship!
Humidity Sensor Carrier HIH-4030
This is a carrier board for the HIH-4030 relative humidity (%RH) sensor from Honeywell outputs an analog voltage that varies nearly linearly with humidity.
TS-051-000
$16.95
6 Ready to Ship!
Gas sensors makes it possible to measure concentrations of gasses such as alcohol, methane, propane, butane, and carbon monoxide.
Custom Robot Request

We specialize in designing and fabricating custom robots and other electro-mechanical devices.

You can also get a quote for custom mechanical, software, and electronics engineering services. We can also do your custom CNC work, general fabrication, and welding.

1-919-557-9162

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New Tactical Robot Website!

Looking for our Tactical Robots? We've created a new, dedicated website to better serve our customers. Please click the image below to visit the new SDRTactical.com!

New Items
HN07-N101 Servo Horn Set
TD-147-7N1

The ROBOTIS HN07-N101 Servo Horn is a servo horn set for the RX-24F, RX-28 and MX-28 Dynamixel servos. This is the new mounting pattern which is included with all N101 series Dynamixels. It comes with a thrust washer for added stability.

$8.90
8 Ready to Ship!
10x Optical Zoom PTZ Full HD IP Camera
WC-070-000

Etrovision's N22Q-10 is an HD 10x Zoom PTZ IP Camera. It can provide HD-1080p internet video using H.264 or MPEG4 using TCP/IP or UDP. It also features motion detection, timers and automatic file uploads via FTP and e-mail.

$769.00
1 Ready to Ship!
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