Sparkfun

This is a simple, thumbnail-size RFID tag. These tags are great for sensing presence, identification, etc., and they\'re small, so they can be eas...

This is a glass, cylindrical RFID tag; it\'s very similar to those [implanted into pets](http://en.wikipedia.org/wiki/Pet_chip) for identification...

This is a simple-to-use [liquefied petroleum gas (LPG)](http://en.wikipedia.org/wiki/Liquefied_petroleum_gas) sensor, suitable for sensing LPG (co...

This is a simple-to-use [compressed natural gas (CNG)](http://en.wikipedia.org/wiki/Compressed_natural_gas) sensor, suitable for sensing natural ga...

This is a simple-to-use [Carbon Monoxide (CO)](http://en.wikipedia.org/wiki/Carbon_monoxide) sensor, suitable for sensing CO concentrations in the...

This is a force sensitive resistor with a square, 1.75x1.5\", sensing area. This FSR will vary its resistance depending on how much pressure is be...

This is a force sensitive resistor with a round, 0.5\" diameter, sensing area. This FSR will vary its resistance depending on how much pressure is ...

Photo interrupter, photogate, photodiode, phototransistor, whatever you want to call it, this sensor is composed of an infrared emitter on one upr...

Breakout board for the 3 axis ADXL335 from Analog Devices. This is the latest in a long, proven line of analog sensors - the holy grail of accelero...

The Minisense 100 from Measurement Specialties is a low-cost cantilever-type vibration sensor loaded by a mass to offer high sensitivity at low fre...

The Minisense 100 from Measurement Specialties is a low-cost cantilever-type vibration sensor loaded by a mass to offer high sensitivity at low fre...

This basic piezo sensor from Measurement Specialties is often used for flex, touch, vibration and shock measurements. A small AC and large voltage...

This basic piezo sensor from Measurement Specialties is often used for flex, touch, vibration and shock measurements. A small AC and large voltage...

This is a very small light sensor. A photocell changes (also called a [photodetector](http://en.wikipedia.org/wiki/Photodetector), photo resistor,...

This alcohol sensor is suitable for detecting alcohol concentration on your breath, just like your common breathalyzer. It has a high sensitivity a...

Three pin JST connector with red, black, and yellow colors. 5 inch wire outs. This cable comes fully assembled as shown and connects directly to m...

This is a [piezoresistive](http://www.google.com/url?sa=t&ct=res&cd=1&url=http%3A%2F%2Fen.wikipedia.org%2Fwiki%2FPiezoresistor&ei=F...

This is a [piezoresistive](http://www.google.com/url?sa=t&ct=res&cd=1&url=http%3A%2F%2Fen.wikipedia.org%2Fwiki%2FPiezoresistor&ei=F...

This is a [piezoresistive](http://www.google.com/url?sa=t&ct=res&cd=1&url=http%3A%2F%2Fen.wikipedia.org%2Fwiki%2FPiezoresistor&ei=F...

These are very thin variable potentiometers. By pressing down on various parts of the strip, the resistance linearly changes from 100Ohms to 10,00...

These are very thin variable potentiometers. By pressing down on various parts of the strip, the resistance linearly changes from 100Ohms to 10,00...

These are very thin variable potentiometers. By pressing down on various parts of the strip, the resistance linearly changes from 100Ohms to 10,00...

A simple flex sensor 4.5\" in length. As the sensor is flexed, the resistance across the sensor increases. Patented technology by Spectra Symbol -...

36" high temperature Type-K Thermocouple with glass braid insulation. **Features:** * Type-K Thermocouple (Ni-Cr) * 30 gauge stripped and p...