How to connect external sensors to labview?

[chuggins143]

---

@RTSLVU wrote:

---

@fauzan wrote:

i want to ask How can i connect external sensors to NI labview for my final year project.? here are my lists of sensors:

a. Temperature sensor (LM35)
b. Humidity sensor (HH10D)
c. Light sensor (LDR)
d. Moisture sensor

---

You need to gointo a little more detail. From your list I am guessing you are going to need a fair amount of external circuitry at minimum a power source and a resistor. Then you are going to need something to do the A to D and interface to the computer.

NI has low cost devices like the NI USB-6008 miltifunction I/O. I have one of them and it is "okay" but I really do not like using it because programming it seems cumborsome to me.

I suggest the USB 1208-LS from  Measurement Computing for $129 bucks it's equal to the NI USB-6008 ans costs less 

Plus the LabView Vi's are straight forward drop in types, the NI device requires you to go through the DAQ wizard and (IMHO) over complicates everything.

---

I'll second this one, I'm using several pieces of hardware from MC including the one mentioned with great success.  I did a quick lookup of some of the sensors you listed... the first one and third one will probably be cake as they are just analog voltage circuits... the HH10D looks like it has a frequency output... I've never dealt with that, but I'm sure it's doable, you'll just have to do some research and figure out how to convert it into an analog signal or a digital signal.  You didn't give a model or spec for the final unit, but most that I've seen should have some type of analog voltage output.  The 1208LS is a nice little unit.  I have several controls systems designed around them along with the relay board from MC.

Good luck!

C

[arvin_labrat]

a. Temperature sensor (LM35)
b. Humidity sensor (HH10D)

To replace the first two sensors on your list I suggest you check out a Precon HS 2000.  They have a version that puts out a ratiometric analog signal for both temp and RH or they have one that will interface with RS 232.

Sounds like a fun project.

Good Luck

[fauzan89]

can anyone suggest any low cost CO2 sensors for my greenhouse project which compatible with NI Labview..???

[chuggins143]

Take a look at this and it should get you on the right path.

http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1251383821

Enjoy,

C

[NIquist]

http://www.co2meter.com/collections/co2-sensors

$65 and has PWM output that should be easy to read (although you still haven't provided any interfacing details).

There are hundreds of choices out there.  I suggest you Google CO2 Sensor and look for some cheapies.  Then, decide on how you want tp interface.  Keep in mind that you have the option to buy a multi-sensor module that could handle ALL your gas monitoring in one box with a simple RS-232 or USB interface.  It will probably be more of a scientific instrument though and cost more.

[fauzan89]

i wil use usb interface... usb daq 6009

[shush123]

Hello!I wanted to know how we can interface temperature sensor using labview.

[Ranjeet_Singh]

Read the manual of temp sensor, there must be some inteface like USB to RS232..etc

[Ranjeet_Singh]

Read the manual of temp sensor, there must be some inteface like USB to RS232..etc

[hamdouch1000]

hello i'm also using these sensors for my final project of studies and if you d'ont mind i want you to send me please your VI to solve my problem and my teacher want me to save data (measerment) into a data base every day to compare results in the next year can you help me?