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⚡ Why Engineers Use 4–20mA Instead of 0–20mA? ⚡

This is one of the most important concepts in instrumentation & industrial automation 👀

💡 In a 4–20mA loop:
✅ 4mA = Valid ZERO
✅ 20mA = Full Scale
❌ 0mA = Fault Condition

That means engineers can instantly identify:
✔ Broken wire
✔ Power failure
✔ Transmitter fault
✔ Signal loop issue

This concept is called:
🔥 LIVE ZERO 🔥

That’s why 4–20mA became the industrial standard for:
✔ PLC
✔ DCS
✔ SCADA
✔ Pressure / Flow / Level Transmitters
✔ Process Automation

Every instrumentation engineer should clearly understand this concept 💯

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⚡ Power Plant Interview MCQ 🔥

Can you answer this question correctly? 😎
Only real engineers will get this right 💯

👇 Drop your answer in comments
✅ Let’s see who is a real engineer

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