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Here's a list of sensor types that someone has compiled: http://nuigroup.com/forums/viewthread/1862/
==Compass sensors==
==Compass sensors==


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==Pressure==
==Pressure==
SCP1000 - Digital Absolute Pressure Sensors<br/>
Digital absolute pressure sensors are intended for barometric pressure measurement and altimeter applications for 30kPa...120kPa and -20°C...70°C measuring ranges.<br/>
*Measuring Range:  30 kPa - 120 kPa
*Standard digital output: SPI or I2C
[http://www.vti.fi/en/support/obsolete_products/pressure_sensors/ Absolute Pressure Sensor by VTI Technologies]<br/>
[http://www.vti.fi/midcom-serveattachmentguid-9cbae6a382efd245cb62354a54ff62c7/scp1000-d01_-d11_pressure_sensor_datasheet_28-08-2007.pdf Datasheet SCP1000]


==Humidity==
==Humidity==
SHT71 - Digital Humidity Sensor (RH&T)<br/>
The capacitive humidity sensor SHT71 is fully calibrated and provides a digital output.
*RH operating range:  0 – 100% RH
*Output:  digital (2-wire interface)
[http://www.sensirion.com/en/01_humidity_sensors/05_humidity_sensor_sht71.htm Humidity Sensor by Sensirion]<br/>
[http://www.sensirion.com/en/pdf/product_information/Datasheet-humidity-sensor-SHT7x.pdf Datasheet SHT7x]


==Electric field strength==
==Electric field strength==
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==Echolocation / Distancing / Lidar==
==Echolocation / Distancing / Lidar==
=== Sonar ===
Found several distance sensors, which are one or two sonar transducers on a bit of chip with logic attached.  The logic does various things but most will produce an analog voltage corresponding to the distance sensed.
'''Parallax PING)))''' -- I don't like this much, it seems very inaccurate past about 3 feet.  OTOH it was the first I worked with and I should probably reevaluate it later when I have more experience.
'''Maxbotics MAXSonar EZn''' - where n is 0 - 5 or so, a family of sensors with different characteristics.  They all have the same behavior, though, basically they'll produce analog OR serial output.  In analog mode they can be daisy-chained.  These are the smallest ones I've found so far, consisting of only the one transceiver which does both ping and listen.  For this reason they can't read closer than 6 inches.
* datasheet https://www.noisebridge.net/images/9/93/LV-MaxSonar-EZ0-Datasheet.pdf
* someone else's code http://www.flatline.net/journal/2007/12/02/arduino-reading-the-maxbotix-ultrasonic-rangefinder/
'''Devantech SRF0n''' - where n is 1 - 10.  I only just found this but it SAYS it has a 3 meter range.  And the family claim up to 6m for some of them.  There's also a SRF235 which uses 235kHz whereas the rest use 40kHz.  One of the family can be daisy-chained; the expensive one I expect.
* useful discussion of the family http://www.acroname.com/robotics/info/articles/devantech/srf.html
* tech specs http://www.robot-electronics.co.uk/htm/srf05tech.htm
* low price vendor http://www.junun.org/MarkIII/Info.jsp?item=94
'''VEX Ultrasonic Rangefinder''' - VEX seems to be a robot system.  Part is not cheaper so prolly not worth investigating deconstructing it.  http://www.trossenrobotics.com/store/p/5683-VEX-Ultrasonic-Range-Finder.aspx
=== IR ===


==Strain Gauges==
==Strain Gauges==
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==Ambient Network Data==
==Ambient Network Data==
[[Category:Sensebridge]]
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