===== Barometric Pressure / Altitude =====

^  Image  ^  Description  ^  Datasheet  ^  Distributor  ^  Eagle Lib  ^
|  {{:partfinder:bmp085.jpg?150|}}  |   Digital barometric pressure/temperature  |  [[http://www.bosch-sensortec.com/content/language1/downloads/BST-BMP085-DS000-05.pdf|BMP085]]  |  [[http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=828-1005-1-ND|Digikey]]  |  [[https://github.com/adafruit/Adafruit-Eagle-Library|Adafruit:BMP085]] |

===== Temperature =====

==== IC (chip) sensors ====

|  {{:partfinder:tmp36.jpg?150|}}  | Analog temperature sensor  \\ -40 C - 125 C |  [[http://www.analog.com/en/sensors/digital-temperature-sensors/tmp36/products/product.html|TMP36]]  | [[http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=TMP36GT9Z-ND|Digikey]] [[http://www.analog.com/en/mems-sensors/analog-temperature-sensors/tmp36/products/inventory.html?countryIdHidden=US+&countryNameHidden=United+States&model=|Analog Direct]]  |
|  {{:partfinder:ds18b20.gif?150|}}  | Digital temperature sensor  \\ -55 C - 125 C |  [[http://datasheets.maxim-ic.com/en/ds/DS18B20.pdf|Dallas 18B20]]  | [[http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=DS18B20%2B-ND|Digikey]] [[http://www.mouser.com/ProductDetail/Maxim-Integrated-Products/DS18B20+/?qs=sGAEpiMZZMvbyeSUH4qH%2fLbikZ7SIep9|mouser]]  [[https://shop.maxim-ic.com/storefront/priceavailable.do?Partnumber=DS18B20%2B&event=PartSearch&menuitem=PriceAndAvailability|Maxim Direct]]  |

==== RTD ====
Platinum wire resistive sensors

=== Class A ===
±0.03 to ±0.15 °C accuracy

  * [[http://www.k-instruments.co.uk/acatalog/PICO_.html|K instruments]] (also sold at [[http://www.picotech.com/pt100_sensors.html|Pico tech]]) Pt100 probes for air, immersion 
  * [[http://us.fluke.com/usen/Products/ProductModelStockCheck.htm?pid=1031&cs_id=35633%28FlukeProducts%29&category=|Fluke FP-Plus probe]] used for [[http://us.fluke.com/usen/Products/Food+Pro.htm?trck=foodpro|Fluke's food-temp measuring meter]] (how convenient!) Pt1000 (1000Ω at 0°C) Bit squat but surely adaptable

=== Class B ===

  * [[http://www.omega.com/ppt/pptsc.asp?ref=PRTF-10|Omega PRTF-10]] General purpose class B ±0.3 °C accuracy

===== Radioactivity =====

**Geiger Mueller Tubes** - Handy for people looking to make random number generators or detect radiation. Tubes tend to be Cold War old stock from Russia/US, and tend to be used for detecting Gamma and Beta radiation. You'll need a high voltage boost supply - check nixie tube projects for some HV supply designs

{{:partfinder:g17365b.jpg|}}

Here are some places you can find tubes and kits: [[http://www.electronickitsbychaneyelectronics.com/|Chaney]] [[http://www.goldmine-elec-products.com/products.asp?dept=1468|Electronic goldmine]] [[http://shop.ebay.com/?_from=R40&_trksid=p5197.m570.l1313&_nkw=geiger+tube&_sacat=See-All-Categories|Ebay]]  [[http://unitednuclear.com/index.php?main_page=index&cPath=2_78|United Nuclear]]