Tranmsitter required for 4 wire RTD?

Discussion in 'General Electronics Chat' started by, Jun 12, 2014.


    Thread Starter Member

    Feb 27, 2014
    When temperature has to be sensed with RTD at long distances from central location, they usually need a transmitter which sense at far location & then send data at central base. Since long wires can add resistances

    1. But if use 4 wire RTD, so I still need transmitter for long distance temperature measurement.

    2. I have a 2 wire RTD. If I connect two additional wires, one at each wire close to RTD, so that effect of long wires can be removed.
    Is it fine to convert 2 wire RTD to 4 wire manually like this?
    4 wire have some different fabrication ???
  2. MrCarlos

    Active Member

    Jan 2, 2010

    You can find transmitters at:
    There are also a lot of information. Literature.

    1 if use 4 wire RTD to measure at long distances need a transmitter.

    2 is not good to do that you mention. but you could do.
    Look at the literature on the link above.

    3 What happened to three?

    4 Yes, the manufacture thereof is different.
  3. aamirali


    Feb 2, 2012
    4 wire RTD can be used upto how much long distance after which they require a transmitter?