Ultrasonic Flow Meter – Technical Description
Measurement
The ultrasonic flow meter operates using the transit-time difference principle, ensuring precise and stable readings across a wide range of flow conditions. It measures the difference in time between two ultrasonic signals transmitted in opposite directions through the fluid, providing accurate velocity and flow calculations.
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Measurement principle: Ultrasonic transit-time difference
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Flow velocity range: 0.01 … 25 m/s
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Resolution: 0.25 mm/s
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Repeatability: ±0.15% of measured value or ±0.015 m/s
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Accuracy (volume flow): ±1…3% of measured value (depending on application)
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Accuracy (mean flow velocity): ±0.5% of measured value
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Turn-down ratio: 1:100 (0.25…25 m/s equivalent)
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Measurement rate: 100 Hz (standard)
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Response time: 1 second
Processor Unit
The portable processor ensures reliable operation in demanding field environments, offering intuitive controls and clear data visualization.
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Protection class: IP65
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Operating temperature: –10 to +60 °C
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Display: LCD, 128 × 64 dots, backlit
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Power supply: Rechargeable 4 × NiMH AA 2850 mAh batteries
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Power adapter: 100–240 V AC input, 9 V DC output
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Operating time: Up to 24 hours per full charge
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Dimensions: H 228 × W 72/117 × D 47 mm
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Weight: Approx. 650 g
Sensor
High-precision stainless steel sensors designed for durability and performance across a wide temperature range. Ideal for various pipe materials and installation conditions.
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Pipe diameter range: 50 – 2500 mm
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Sensor head dimensions: 60 × 30 × 34 mm
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Sensor & cable conduit material: Stainless steel
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Temperature range: –30 to +130 °C
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Protection class: IP66
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Cable length: 4 m
Summary
This ultrasonic transit-time flow meter combines accuracy, portability, and robustness — ideal for non-invasive measurement on a wide range of pipe sizes and materials.
It delivers fast response, high measurement stability, and long operating time, making it perfectly suited for industrial diagnostics, hydraulic system monitoring, and temporary flow measurements in water and heating networks.