![What is RTD? What is the difference between 2 wire, 3 wire, and 4 wire RTD? | Instrumentation and Control Engineering What is RTD? What is the difference between 2 wire, 3 wire, and 4 wire RTD? | Instrumentation and Control Engineering](https://cdn.automationforum.co/uploads/2021/12/image-34.png)
What is RTD? What is the difference between 2 wire, 3 wire, and 4 wire RTD? | Instrumentation and Control Engineering
I Will Teach You - RTD Sensor Connections Proper connections for all three types of RTD sensor (2-wire, 3-wire, and 4-wire) to a user configurable transmitter are shown in the following illustrations:
![Miniature RTD Transmitter 4-20 mA Output 2, 3 and 4 Wire RTD Sensors | Evolution Sensors and Controls Miniature RTD Transmitter 4-20 mA Output 2, 3 and 4 Wire RTD Sensors | Evolution Sensors and Controls](https://evosensors.com/cdn/shop/products/P234RMTX2PXPKNFCP_d851fa58-06df-4070-8470-21a7db5de083.jpg?v=1611596405)