Signal Field Guide Reads the Loop Before You Replace the Part

Field notes

The homepage separates signal basics from troubleshooting and bench tools, then routes readers toward focused questions such as whether a 4–20 mA loop reads zero or how PNP and NPN sensors differ. Its example converter maps 12.00 mA to 50.0 bar on a 0–100 bar transmitter range. The site also exposes calculators for loop load, PLC scaling, and 24V drop, alongside a glossary and RSS feed.