The sensor has its own dedicated power source (often AC or high-voltage DC).
Can run hundreds of meters without signal loss (unlike voltage, which drops over distance). shema tokovaja petlja 4 20 ma
If you need a for a specific microcontroller like an Arduino or PLC. The sensor has its own dedicated power source
Typically 24V DC to drive the current through the loop. shema tokovaja petlja 4 20 ma
Easy to troubleshoot with a standard multimeter. 📊 Conversion Math To calculate the current ( ) for a given percentage of the range (
Complete electrical isolation between power and signal. ✅ Why Use 4-20 mA?