This page collects information about using electronic sensors for detecting hydrogen sulfide. 

For information on the DIY photo paper method, see:

https://publiclab.org/hydrogen-sulfide-photopaper

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### Arduino-based sensor prototype 

Our first prototype used a digital sensor for hydrogen sulfide connected to an #arduino. Advantages of this system is that data from the sensor could be logged over time and that tool is reusable and portable. However the [Figaro TGS 825 sensor](http://figarosensor.com/gaslist.html) itself is relatively expensive--approximately $60 for an individual sensor and $40 in bulk. 

[![h2s-sensor-arduino.jpg](https://i.publiclab.org/system/images/photos/000/004/691/medium/h2s-sensor-arduino.jpg)](https://i.publiclab.org/system/images/photos/000/004/691/original/h2s-sensor-arduino.jpg) 

_Arduino and Industrial H2S Sensor_

**More information on the digital sensor:**

[Prototype H2S Sensor](http://publiclaboratory.org/notes/warren/9-19-2011/prototype-h2s-sensor)

[Temperature and Humidity Sensors to Correct H2S](http://publiclaboratory.org/notes/warren/9-26-2011/temperature-and-humidity-sensors-correct-h2s-sensor)

[Arduino + Figaro Hydrogen Sulfide Sensor](http://publiclaboratory.org/notes/warren/9-6-2011/arduino-figaro-hydrogen-sulfide-sensor)

[Arduino Patch for Detecting Hydrogen Sulfide](http://publiclaboratory.org/notes/bha/9-11-2011/arduino-patch-detecting-hydrogen-sulfide)

[Hydrogen Sulfide Detection for Fart Detector](http://publiclaboratory.org/notes/warren/9-6-2011/hydrogen-sulfide-detection-fart-detector)