DESCRIPTION
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This is a pre-wired and waterproofed version of the DS18B20 sensor. Handy for
when you need to measure something far away, or in wet conditions. While the
sensor is good up to 125°C the cable is jacketed in PVC so we suggest keeping it
under 100°C. Because they are digital, you don't get any signal degradation even
over long distances! These 1-wire digital temperature sensors are fairly precise
(±0.5°C over much of the range) and can give up to 12 bits of precision from the
onboard digital-to-analog converter. They work great with any microcontroller
using a single digital pin, and you can even connect multiple ones to the same pin,
each one has a unique 64-bit ID burned in at the factory to differentiate them.
Usable with 3.0-5.0V systems.
The only downside is they use the Dallas 1-Wire protocol, which is somewhat
complex, and requires a bunch of code to parse out the communication. If you
want something really simple, and you have an analog input pin, the TMP36 is
trivial to get going.
We toss in a 4.7k resistor, which is required as a pullup from the DATA to VCC line
when using the sensor. We don't have a detailed tutorial up yet but you can get
started by using the Dallas Temperature Control Arduino library which requires
also the OneWire Library.
https://www.adafruit.com/products/381
2/19/2016
Technical Details
Cable specs:
Stainless steel tube 6mm diameter by 30mm long
Cable is 36" long / 91cm, 4mm diameter
Contains DS18B20 temperature sensor
If your sensor has four wires - Red connects to 3-5V, Black connects to
ground and White is data. The copper wire is soldered to the wire shielding
If your sensor has three wires - Red connects to 3-5V, Blue/Black connects
to ground and Yellow/White is data
DS18B20 Technical specs:
Usable temperature range: -55 to 125°C (-67°F to +257°F)
9 to 12 bit selectable resolution
Uses 1-Wire interface- requires only one digital pin for communication
Unique 64 bit ID burned into chip
Multiple sensors can share one pin
±0.5°C Accuracy from -10°C to +85°C
Temperature-limit alarm system
Query time is less than 750ms
Usable with 3.0V to 5.5V power/data
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