Datasheet

These are very similar to the 4-wire type but there is only one 'pair' of connected wires. The reasoning for this is that

the wires for the RTD are all pretty much the same gauge and length, so rather than having two pairs, the amplifier will

just read one pair and use that resistance as the same for both wires.

2-Wire RTDs

These are as simple as it gets, only one wire per side. You may need to calibrate the sensor by putting it in an ice bath

to get the resistance at 0°C (say 102Ω) and then subtracting 100Ω to figure out the collective resistance of the

connection wires!