Which device generates rotation signals for electronic data systems in a propane metering setup?

• A. Data Logger
• B. Rotation Pulse Generator
• C. Interface Module
• D. Sensor

Answer: (B)

Rotation signals are the timing cues that the electronic data system uses to quantify how much propane flows through the meter. In a metering setup, the meter’s rotating element (like a turbine or wheel) spins as gas moves, and each rotation is converted into a short electrical pulse. The device that does this conversion and outputs a pulse train is the rotation pulse generator. That pulse train is then read by the data system to count rotations and calculate volume or flow rate.

A data logger’s job is to record and store the data it receives, not to create those pulses. An interface module helps connect and communicate between components, but it doesn’t generate the rotation pulses by itself. A sensor detects a physical change (like rotation or flow) but, on its own, doesn’t produce the standardized pulse signals the data system uses. The rotation pulse generator is specifically designed to produce those rotation-based pulses for accurate data collection.