
Temperature Sensor LM335AZ
#1
Posted 29 January 2006 - 03:34 PM
#2
Posted 29 January 2006 - 08:43 PM
http://www.labjack.c...4751273;start=1
You might also consider the LM34CAZ, which does not need a resistor:
https://forums.labja...?showtopic=1040
#3
Posted 04 September 2007 - 09:51 AM
The LM335 works fine with the U12. It is used in our EI-1022 probe. The schematic you found looks like the "Basic Temperature Sensor" figure from the LM335 datasheet (national.com).
http://www.labjack.c...4751273;start=1
You might also consider the LM34CAZ, which does not need a resistor:
https://forums.labja...?showtopic=1040
Hi....I have a question about this. In another thread (Post) you noted that:
-----------------
The LM34CAZ is a great temperature sensor. With no load resistor, you will get a range of about 60 to 300 degrees F. With a 4.7k resistor loading the LM34 output, you can get the full single supply range of 5 to 300 degrees F.
-----------------
I need to read a water temperature down to around 35 degrees F. Since I will need to add a resistor to the lm34caz to lower the readable temperature, is there any other benefit over the LM335?
Sorry for such a simple question, but I am just learning. If I use the LM34CAZ with the 4.7k resistor, do I install the resistor in the same way as the diagram earlier in this thread?
Thank you!!
#4
Posted 04 September 2007 - 10:56 AM
The LM335 works fine with the U12. It is used in our EI-1022 probe. The schematic you found looks like the "Basic Temperature Sensor" figure from the LM335 datasheet (national.com).
http://www.labjack.c...4751273;start=1
You might also consider the LM34CAZ, which does not need a resistor:
https://forums.labja...?showtopic=1040
Hi....I have a question about this. In another thread (Post) you noted that:
-----------------
The LM34CAZ is a great temperature sensor. With no load resistor, you will get a range of about 60 to 300 degrees F. With a 4.7k resistor loading the LM34 output, you can get the full single supply range of 5 to 300 degrees F.
-----------------
I need to read a water temperature down to around 35 degrees F. Since I will need to add a resistor to the lm34caz to lower the readable temperature, is there any other benefit over the LM335?
Sorry for such a simple question, but I am just learning. If I use the LM34CAZ with the 4.7k resistor, do I install the resistor in the same way as the diagram earlier in this thread?
Thank you!!
The LM34 is a quite different device, see the info in this thread https://forums.labja...h...893&hl=lm34 for the resistor/connection data.
#5
Posted 04 September 2007 - 12:09 PM
#6
Posted 19 February 2014 - 01:04 AM
how about dht-11?
#7
Posted 19 February 2014 - 08:36 AM
We do support I2C, SPI, 1-wire, and SBUS, so consider something using those protocols. For example, the SHT1x & SHT7x sensors from Sensirion use SBUS.
The DHT11 & DHT22 look like they use an inconvenient custom serial protocol, but will have someone else look a little closer:
http://www.adafruit....heets/DHT22.pdf
#8
Posted 19 February 2014 - 10:04 AM
The DHT22 seems to use a protocol very similar to 1-wire, but the timing is different. The times are too small to use a script so firmware support would be required.
I don't recommend using this part.
If you only need temperature there are a lot of options. Here are a couple:
1-Wire: DS18B20
I2C: TMP75
Thermocouples are also easy to use with the T7.
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