Long 3-wire RTD run

[TwoBlocked]

Dang. That's a tough change.

Never mind, I'll just unwatch.

 

[tallgirl]

Dang. That's a tough change.

Keeps me employed?

 

[kwired]

For long runs, use a four wire RTD. That will compensate for the resistance in the conductors. Then choose the transmitter for the output you want.

Haven't encountered those myself, assuming this uses two conductors on each end of the RTD. Makes sense that would be even more accurate than a three wire system but you also would need the connecting device to support having four wires. Most everything I've encountered only had three input terminals. Seems would only be common where precision level has tighter tolerance requirements.

 

[motormuff]

You could use an RTD temperature transmitter that has a 4-20 ma output. It would be accurate for thousands of feet.

A 3 or 4 wire RTD should be accurate for your distance, a 3 wire is fine