This is a small device called a reed switchhttp://en.wikipedia.org/wiki/Reed_switch. When the device is exposed to a magnetic field, the two ferrous materials inside the switch pul..
Ex Tax: $2.75
This is a small force sensitive resistor. It has a 0.16" (4 mm) diameter active sensing area. This FSR from Interlink Electronics will vary its resistance depending on how much pr..
Ex Tax: $7.75
This is a very small light sensor. A photocell changes (also called a photodetector) resistance depending on the amount of light it is exposed to. These little sensors make great a..
Ex Tax: $1.85
The TSL235R light-to-frequency converter outputs a square wave (50% duty cycle) with frequency directly proportional to light intensity (irradiance). The device has been temperatur..
Ex Tax: $3.70
This type of photoresistor is made of environment-friendly materials(no Cadmium and Lead) compared with the traditional CDS photoresistor.
It changes resistance depending on the..
Ex Tax: $1.50
10K thermistor with a negative temperature coefficient. Good choice for temp-sensing applications.
You get only one thermistor.
Ex Tax: $0.95
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.
Ex Tax: $11.25
This is the same temperature sensor that is included in our SparkFun Inventor's Kit. The TMP36 is a low voltage, precision centigrade temperature sensor. It provides a voltage outp..
Ex Tax: $2.35
Photosensitive resistance is the resistance of a semiconductor material, the conductivity change with light intensity varies.
The use of this feature will work made of different..
Ex Tax: $1.40
The US1881 is an integrated Hall effect latched sensor. That's nice but what does it do? Holding a magnet near the sensor will cause the output pin to toggle. This makes for a robu..
This is a small device called a reed switch. When the device is exposed to a magnetic field, the two ferrous materials inside the switch pull together and the switch closes. When t..
Ex Tax: $1.20
High sensitivity, rapid response.
Compact structure, easy installation, good water resistance.
The use of wide temperature range, good stability, high reliability.
Ex Tax: $2.35