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NeuroSky Mindwave Mobile
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Price: $226.18
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Sparkfun Item #: SEN-12805 -

"This is the Mindwave Mobile from NeuroSky, an EEG headset that safely measures and transfers the power spectrum (alpha waves, beta waves, etc) data via Bluetooth to wirelessly communicate with your computer, iOS, or Android device. This headset can be simply slipped on to be able to see your brainwaves change in real time. With the Mindwave Mobile you can monitor your levels of attention and relaxation and even learn about how your brain responds to your favorite music. This headset is an...

Pulse Sensor
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Price: $41.06
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Sparkfun Item #: SEN-11574 -

"Heart rate data can be really useful whether you’re designing an exercise routine, studying your activity or anxiety levels or just want your shirt to blink with your heart beat. The problem is that heart rate can be difficult to measure. Luckily, the Pulse Sensor Amped can solve that problem! The Pulse Sensor Amped is a plug-and-play heart-rate sensor for Arduino. It can be used by students, artists, athletes, makers, and game & mobile developers who want to easily incorporate live...

Methane CNG Gas Sensor - MQ-4
Price: $8.02
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Sparkfun Item #: SEN-09404 -

"This is a simple-to-use compressed natural gas (CNG) sensor, suitable for sensing natural gas (composed of mostly Methane [CH4]) concentrations in the air. The MQ-4 can detect natural gas concentrations anywhere from 200 to 10000ppm. This sensor has a high sensitivity and fast response time. The sensor’s output is an analog resistance. The drive circuit is very simple; all you need to do is power the heater coil with 5V, add a load resistance, and connect the output to an ADC. This...

SparkFun Soil Moisture Sensor
Price: $8.17
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Sparkfun Item #: SEN-13322 -

"The SparkFun Soil Moisture Sensor is a simple breakout for measuring the moisture in soil and similar materials. The soil moisture sensor is pretty straight forward to use. The two large exposed pads function as probes for the sensor, together acting as a variable resistor. The more water that is in the soil means the better the conductivity between the pads will be and will result in a lower resistance, and a higher SIG out. To get the SparkFun Soil Moisture Sensor functioning all you will...

Alcohol Gas Sensor - MQ-3
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Price: $8.15
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Sparkfun Item #: SEN-08880 -

"This alcohol sensor is suitable for detecting alcohol concentration on your breath, just like your common breathalyzer. It has a high sensitivity and fast response time. Sensor provides an analog resistive output based on alcohol concentration. The drive circuit is very simple, all it needs is one resistor. A simple interface could be a 0-3.3V ADC. Please review the datasheet for conversions to ppm then Wikipedia.org for BAC. Features: 5V DC or AC circuit Requires heater voltage Operation...

Biomedical Sensor Pad (10 pack)
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Price: $13.08
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Sparkfun Item #: SEN-12969 -

"This is a 10 pack of Biomedical Sensor Pads, disposable electrodes that can be used to measure EEG, ECG and EMG levels. these little pads are perfect for short-term monitoring of Neurofeedback and Biofeedback purposes. They are to be used once and are very handy because of integrated, latex-free gel. Each pad adheres very well to the skin and the snap connector can be pushed on or removed from the electrode lead with no issue. Note: This product is NOT a medical device and is not intended to...

BITalino (r)evolution Board Kit
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Price: $403.91
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Sparkfun Item #: DEV-14022 -

"This is the BITalino ( r )evolution Board Kit, a (comparatively) low-cost biomedical data acquisition dev board that allows you to create projects using physiological sensors and tools. Each BITalino is presented in a “ProtoSnap style,” enabling it to be programmed as a whole board or snapped apart for use in future projects. This dev board also has no shortage of programming APIs, which include Arduino, Python, Java, Android, iOS and more. The BITalino is equipped with 14...

Carbon Monoxide Sensor - MQ-7
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Price: $11.93
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Sparkfun Item #: SEN-09403 -

"This is a simple-to-use Carbon Monoxide (CO) sensor, suitable for sensing CO concentrations in the air. The MQ-7 can detect CO-gas concentrations anywhere from 20 to 2000ppm. This sensor has a high sensitivity and fast response time. The sensor’s output is an analog resistance. The drive circuit is very simple; all you need to do is power the heater coil with 5V, add a load resistance, and connect the output to an ADC. This sensor comes in a package similar to our MQ-3 alcohol sensor,...

Dissolved Oxygen Kit
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Price: $434.05
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Sparkfun Item #: SEN-11194 -

"Atlas Scientific is on a mission to make high-quality sensors for environmental monitoring available to everyday hackers and makers. All of their kits are easy to calibrate and connect to your microcontroller-based project. There are basically two easy ways to measure oxygen dissolved in water: You can guess and then insist that you measured it, which has the obvious disadvantage of being wildly inaccurate; or you can just use the Atlas Scientific Dissolved Oxygen Kit. The Dissolved Oxygen...

Electrical Conductivity Kit
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Price: $359.99
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Sparkfun Item #: SEN-12908 -

"Atlas Scientific is on a mission to make high-quality sensors for environmental monitoring available to everyday hackers and makers. All of their kits are easy to calibrate and connect to your microcontroller-based project. When was the last time you measured something in microsiemens? Well isn’t it about time you did? Siemens are the SI unit for measuring something called conductance which is simply the inverse of an element’s resistance, and it can tell you a lot about a...

Fingerprint Scanner - 5V TTL (GT-511C1R)
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Price: $53.48
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Sparkfun Item #: SEN-13007 -

"Fingerprint scanners are awesome. Why use a key when you have one right at the tip of your finger? Unfortunately, they’re usually unreliable or difficult to implement. Well not anymore! We’ve found this great fingerprint module from ADH-Tech that communicates over TTL Serial so you can easily embed it into your next project. The module itself does all of the heavy lifting behind reading and identifying the fingerprints with an on-board optical sensor and 32-bit CPU. All you need...

Fingerprint Scanner - TTL (GT-511C3)
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Price: $82.20
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Sparkfun Item #: SEN-11792 -

"Fingerprint scanners are awesome. Why use a key when you have one right at the tip of your finger? Unfortunately, they’re usually unreliable or difficult to implement. Well not anymore! We’ve found this great fingerprint module from ADH-Tech that communicates over TTL Serial so you can easily embed it into your next project. The module itself does all of the heavy lifting behind reading and identifying the fingerprints with an on-board optical sensor and 32-bit CPU. All you need...

Gas Sensor Breakout Board
Price: $1.54
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Sparkfun Item #: BOB-08891 -

"Simple breakout board for the MQ - 3, MQ - 4 and MQ - 6 gas sensors. All you need is VCC at 5V, GND, and a resistor to an ADC, that is it. Note: This is the PCB only. Sensors listed below. Dimensions: 16.8mm diameter Documents: Schematic Eagle Files Wiring Example " ...

Hydrogen Gas Sensor - MQ-8
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Price: $13.08
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Sparkfun Item #: SEN-10916 -

"This is a simple-to-use hydrogen gas sensor, suitable for sensing hydrogen concentrations in the air. The MQ-8 can detect hydrogen gas concentrations anywhere from 100-10000ppm. This sensor has a high sensitivity and fast response time. The sensor’s output is an analog resistance. The drive circuit is very simple; all you need to do is power the heater coil with 5V, add a load resistance, and connect the output to an ADC. This sensor comes in a package similar to our MQ-3 alcohol...

LPG Gas Sensor - MQ-6
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Price: $8.15
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Sparkfun Item #: SEN-09405 -

"This is a simple-to-use liquefied petroleum gas (LPG) sensor, suitable for sensing LPG (composed of mostly propane and butane) concentrations in the air. The MQ-6 can detect gas concentrations anywhere from 200 to 10000ppm. This sensor has a high sensitivity and fast response time. The sensor’s output is an analog resistance. The drive circuit is very simple; all you need to do is power the heater coil with 5V, add a load resistance, and connect the output to an ADC. This sensor comes...

MyoWare Cable Shield
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Price: $6.52
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Sparkfun Item #: DEV-13687 -

"The MyoWare Muscle Sensor is now designed to be wearable allowing you to attach biomedical sensor pads directly to the board itself. However, there still may be cases where you want to mount the sensor pads away from the other hardware, this is where the MyoWare Cable Shield comes in. This shield provides a 3.5mm jack where you can attach a three electrode sensor cable allowing you to test and use the MyoWare Muscle Sensor without actually attaching it to your person. The MyoWare Cable Shield...

MyoWare LED Shield
Price: $41.17
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Sparkfun Item #: DEV-13688 -

"The MyoWare LED Shield is designed to pair with the MyoWare Muscle Sensor. The blue 10-segment bar graph shows the magnitude of the measured signal. The more muscle activation measured, the higher up the board the lit LEDs will go. With this shield you will be provided with a visual representation of the signals provided by the MyoWare Muscle Sensor and an on-board lithium polymer (LiPo) power source. This shield is likely to be the top board in a stack, so solder on some 1x3 male headers and...

MyoWare Muscle Sensor
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Price: $62.62
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Sparkfun Item #: SEN-13723 -

"Using our muscles to control things is the way that most of us are accustomed to doing it. We push buttons, pull levers, move joysticks… but what if we could take the buttons, levers and joysticks out of the equation? This is the MyoWare Muscle Sensor, an Arduino-powered, all-in-one electromyography (EMG) sensor from Advancer Technologies. The MyoWare board acts by measuring the filtered and rectified electrical activity of a muscle; outputting 0-Vs Volts depending the amount of...

MyoWare Power Shield
Price: $6.52
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Sparkfun Item #: DEV-13684 -

"The MyoWare Power Shield is designed to take two standard CR2032 coin cell batteries to power the MyoWare Muscle Sensor. We have made this board in a way that the coin cell batteries are connected in parallel for extended capacity at a nominal 3.0V. Connecting the MyoWare Muscle Sensor to battery power allows for a cleaner signal while also eliminating the possibility of creating a dangerous current path to the power grid. One thing to note is that due to the size of the batteries, the remote...

MyoWare Proto Shield
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Price: $4.87
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Sparkfun Item #: BOB-13709 -

"This is the MyoWare Proto Shield, a simple proto-board for your MyoWare Muscle Sensor. With this shield you will be able to use the area provided to solder on whatever custom circuitry you can come up with. This shield provides 8 x 15 solderable through holes on a standard 0.1" grid. The MyoWare Proto Shield is equipped with two rows of 3-pin plated through holes on each end of the board. This allows for standard 0.1" headers to be used to stack the shield with other MyoWare boards. The...

Optical Dust Sensor - GP2Y1010AU0F
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Price: $19.67
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Sparkfun Item #: COM-09689 -

"Sharp’s GP2Y1010AU0F is an optical air quality sensor, designed to sense dust particles. An infrared emitting diode and a phototransistor are diagonally arranged into this device, to allow it to detect the reflected light of dust in air. It is especially effective in detecting very fine particles like cigarette smoke, and is commonly used in air purifier systems. The sensor has a very low current consumption (20mA max, 11mA typical), and can be powered with up to 7VDC. The output of the...

ORP Kit
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Price: $320.49
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Sparkfun Item #: SEN-14090 -

"This is the ORP Kit, a large sensor kit that measures the ability of a solution to act as an oxidizing or reducing agent. Inside the kit you will find everything you need to get started, including an ORP (Oxidation Reduction Potential) probe, an EZO™ ORP board, two bottles of solution and a BNC connector board. The ORP probe in this kit is a passive device that detects a current generated from the oxidation reduction of water. This current (which can be positive or negative) is very...

pH Sensor Kit
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Price: $277.71
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Sparkfun Item #: SEN-10972 -

"Need to measure precise pH? This kit includes everything you need including buffer solutions for calibration, pH probe, and even a board to connect directly to your favorite microcontroller. This is laboratory-grade equipment and not just a toy or educational kit. All you need to do is follow the included instructions for calibrating the probe and connect it to the included pH Circuit. The pH Circuit outputs data from the probe over serial, so it couldn’t be much easier to use....

Polar Heart Rate Monitor Interface
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Price: $98.66
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Sparkfun Item #: SEN-08661 -

"This is a wonderful evaluation board cooperatively designed by danjuliodesigns and SparkFun. The Heart Rate Monitor Interface (HRMI) is an intelligent peripheral device that converts the ECG signal from the Polar Heart Rate Monitor (HRM) into easy-to-use heart rate data. It implements a sophisticated algorithm for computing an average heart rate even with noisy or intermittent data from the transmitter. Note: This product is a collaboration with Dan Julio. A portion of each sales goes back to...

SparkFun Particle Sensor Breakout - MAX30105
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Price: $22.02
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Sparkfun Item #: SEN-14045 -

"The SparkFun MAX30105 Particle Sensor is a flexible, powerful sensor enabling sensing of distance, heart rate, particle detection and even the blinking of an eye. The MAX30105 has been equipped with three LEDs as well as a very sensitive photon detector. The idea is to pulse the different LEDs, then detect what shines back. Based on the reflected signature it’s possible to detect different types of particles or materials (such as oxygenated blood or smoke from a fire). The MAX30105...

SparkFun Single Lead Heart Rate Monitor - AD8232
Price: $32.92
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Sparkfun Item #: SEN-12650 -

"The AD8232 SparkFun Single Lead Heart Rate Monitor is a cost-effective board used to measure the electrical activity of the heart. This electrical activity can be charted as an ECG or Electrocardiogram and output as an analog reading. ECGs can be extremely noisy, the AD8232 Single Lead Heart Rate Monitor acts as an op amp to help obtain a clear signal from the PR and QT Intervals easily. The AD8232 is an integrated signal conditioning block for ECG and other biopotential measurement...

Vernier Sensor - pH Sensor
Price: $162.41
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Sparkfun Item #: SEN-12872 -

"This is the Vernier pH Sensor, a simple device that can be used to measure the acidity and basicity of liquids. This Vernier sensor can be used in a multitude of applications including acid-base titrations, pH monitoring in home aquariums, analysis of water quality in lakes and streams, and more. Each pH sensor probe is a sealed, gel-filled, type with a hard outer epoxy body that can function in a temperature range of 5 to 80°C. Additionally, these sensors can test in the typical pH...