Technologies
Advanced Ultrasonic Solutions for Precision Flow Measurement and Flow Control
At Allengra, we pioneer ultrasonic sensing technology that transforms how industries measure, monitor, and control fluid flow. Our non-invasive ultrasonic solutions deliver unparalleled accuracy across liquids and gases, eliminating the limitations of traditional mechanical meters while providing superior performance in the most demanding applications.
Built on the time-of-flight principle, our ultrasonic transducers measure fluid velocity by analyzing the transit time difference of acoustic pulses traveling upstream and downstream. This contactless approach ensures zero pressure drop, immunity to magnetic interference, and exceptional reliability—independent of pressure, density, or electrical conductivity.
With our Ceramic Valve Technology we are pioneers in combining precise flow measurement with linear flow control.
Ultrasonic Principle - Time-of-flight Principle
Gas Bubble Detection - Technology
High-Speed Temperature Measurement - Fast response time
Glycol Concentration - Glycol concentration detection and freezing-point estimation
Gas Concentration & Mixing Ratio Measurement
OEM, Tailor-made Ultrasonic Flowmetering & Flow Control Solutions
KNOWLEDGE BASE
Ultrasonic time-of-flight measurement sends acoustic pulses between two transducers positioned at an angle to the flow. Transit time difference between upstream and downstream pulses is proportional to fluid velocity, enabling precise flow rate calculation. This principle is independent of pressure, density, or conductivity, making it applicable to clean liquids. Integrated temperature compensation maintains accuracy across thermal operating ranges.
Ultrasonic sensors provide excellent turndown ratios, low-pressure drop, and immunity to magnetic or electrical interference unlike electromagnetic or vortex meters. Absence of moving parts eliminates maintenance, extends service intervals, and reduces total cost of ownership versus mechanical meters. Ultrasonic technology offers superior performance in bidirectional and low-flow applications where other methods struggle with accuracy or repeatability.
Ultrasonic sensors offer superior low-flow sensitivity and wider turndown ratios compared to vortex meters, which require minimum Reynolds numbers to generate stable vortex shedding. Unlike vortex technology, ultrasonic measurement introduces zero pressure drop and is immune to vibration-induced noise that can compromise vortex meter accuracy. The absence of flow obstructions also makes ultrasonic sensors ideal for viscous fluids and applications where minimal flow disturbance is critical.
Ultrasonic sensors offer superior low-flow sensitivity and wider turndown ratios than vortex meters, which require minimum Reynolds numbers for stable vortex shedding. Unlike vortex technology, ultrasonic measurement has zero pressure drop and immunity to vibration-induced noise. Absence of flow obstructions makes ultrasonic sensors ideal for viscous fluids and applications requiring minimal flow disturbance.
Our signal processing algorithms incorporate advanced filtering, multi-path averaging, and real-time temperature compensation to reject environmental noise and mechanical interference. Sensor housings are mechanically isolated and designed to minimize vibration coupling into the acoustic path. Extensive testing across automotive and industrial vibration profiles ensures that measurement accuracy remains within specification even under harsh dynamic conditions.
Yes. Gas bubble detection is built into the measurement itself: entrained gas changes the acoustic signal in a way the sensor recognizes and reports, with no extra hardware in the fluid path. The output is used for system diagnostics and for safety functions. Our R290 Safety Development Kit, for example, uses bubble detection to identify refrigerant leaks in the heat exchangers of propane heat pumps.
Temperature sensing is integrated in the flow sensor and reaches a T09 response time below 0.25 seconds, considerably faster than conventional immersed probes. This supports accurate heat-energy calculation and fast reaction to thermal transients in heat pumps, data center cooling, and process control, without separate temperature instrumentation.