A liquid level controller linearly converts a displacement of 2 m to 3 m into 4-20 mA control signal. A relay serves as two position controller to open and close an inlet valve. Relay closes at 12 mA and opens at 10 mA. The hysteresis zone is:
A. 0.1 m
B. 0.125 m
C. 0.15 m
D. 0.2 m
Answer: Option B
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