Ultrasonic & Remote-Transmission Water Meters: Differences

1. Differences in Working Principles and Structures

Composed of a mechanical meter body and an electronic module. Water flow impacts the impeller to rotate for measurement. A sensor converts the reading into an electrical signal, which is transmitted remotely via wired (e.g., M-Bus) or wireless (e.g., NB/GPRS/LoRaWAN) methods.

Ultrasonic Water Meters

Calculate flow velocity by detecting the time difference between ultrasonic waves propagating downstream and upstream, then directly derive the flow rate. They have no moving parts such as impellers, and a built-in communication module supports remote meter reading.

2. Comparison of Performance Characteristics

Accuracy and Reliability

Remote-Transmission Water Meters: Accuracy is affected by mechanical wear. Errors (±2%) may occur after long-term use, requiring regular maintenance.

Ultrasonic Water Meters: Error is ≤±1%, with a wide range ratio (1:400). They can detect micro-flow rates of 0.1L/h, have no wear, and a long service life.

Installation and Maintenance

Remote-Transmission Water Meters: Easy to install, but signals are prone to interference, resulting in higher maintenance costs.

Ultrasonic Water Meters: No requirements for installation angle, but environmental factors (e.g., air bubbles) may affect measurement, and the cost is relatively high.

Applicable Scenarios

Remote-Transmission Water Meters: Suitable for residential areas or commercial buildings with limited budgets that require remote meter reading.

Ultrasonic Water Meters: Applicable to scenarios with high-precision requirements, such as industrial water use, agricultural irrigation, or complex environments.‌‌