Frequently Asked Questions

Allengra's ultrasonic time-of-flight sensors have no moving parts, eliminating wear, drift, and maintenance required by turbine or paddle wheel meters. By measuring acoustic transit time in both flow directions, they deliver high accuracy across wide ranges without pressure drop or obstruction. This non-invasive design ensures long-term stability and reliability for demanding OEM applications where total cost of ownership matters.

Our sensors are optimized for clean to slightly contaminated liquids with predictable acoustic properties including water, glycol mixtures, oils, and many industrial fluids. Performance depends on acoustic impedance, viscosity, and particle content; highly aerated, multiphase, or opaque slurries may require application review. We work closely with OEMs during the specification phase to validate compatibility and ensure optimal sensor configuration for each fluid type.

Allengra sensors are factory-calibrated and deliver accurate measurements immediately upon installation in most applications. Field calibration is not required under normal operating conditions, though verification against a reference standard is recommended during commissioning for critical systems. Our time-of-flight principle inherently compensates for temperature and ensures measurement stability over the product's operational life.

Yes. Allengra sensors support multiple industry-standard output formats including I²C, UART, PWM, and analog signals, enabling seamless integration with PLCs, microcontrollers, SCADA systems, and embedded platforms. We provide comprehensive technical documentation, reference designs, installation kits, and application support to accelerate integration timelines.

With no moving parts and robust solid-state construction, Allengra sensors are designed for operational lifespans exceeding 10 years in typical industrial and HVAC environments. Actual lifespan depends on operating conditions such as fluid compatibility, temperature cycling, and installation quality. Our sensors undergo extensive endurance testing to ensure they meet the reliability expectations of mission-critical applications.

MID type approval covers the complete meter in its final configuration, so it is handled per program rather than as a blanket certification. The measurement platform meets the accuracy and stability requirements behind the relevant MID annexes, such as MI-001 for water meters and MI-004 for thermal energy meters. For OEM projects that need MID compliance, we plan the approval route together with the customer during the specification phase.

Allengra sensors operate from standard low-voltage DC power supplies. The input voltage range and current consumption vary by model and output interface; exact specifications are provided in each product datasheet. The sensors use energy-efficient electronics and contain no moving parts. Ultra-low-power operating modes are also available for battery-powered OEM applications.

The range depends on the model. Micro flow meters resolve the very low flows needed for precise dosing, L-Type meters cover spans such as 10-2,500 l/h and 40-8,600 l/h, and the ALSONIC XL measures from 9 l/h up to 60,000 l/h. Each datasheet lists the exact minimum and maximum flow rates per nominal diameter, and the time-of-flight principle keeps accuracy stable at both ends of the span.

Current capacity is in the million sensors per year. Manufacturing runs through qualified ISO-certified partners in a worldwide, multiple-source supply chain, while most of the production steps and final testing, calibration, and quality control take place at our own facilities. The same structure covers everything from prototype batches to high-volume OEM programs.

We mainly produce our sensors in our facility situated in Oradea, Romania.

Every sensor is calibrated on reference flow rigs at the factory before shipment, so no field calibration is required under normal operating conditions. Products also go through endurance, temperature-cycling, and vibration testing as part of our ISO 9001 quality process. Where the application demands it, sensors are tested and certified against specific standards, for example EN IEC 60335-2-40 for use in propane (R290) heat pumps.

Yes. Allengra sensors support analog signals, PWM, UART, I²C, and Modbus, so they connect to the controllers already in use with mechanical or vortex meters. A retrofit usually improves low-flow accuracy and turndown ratio and removes the maintenance that comes with moving parts. Our engineering team helps match housings, fittings, and signal behavior to the existing installation.

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.

Allengra sensors are deployed across HVAC systems, hydrogen fuel cell vehicles, industrial process control, medical equipment, and energy management applications. OEM partners integrate our technology into heat pumps, cooling systems, fuel dispensers, and analytical instruments where precision liquid measurement is critical. We serve sectors ranging from automotive and aerospace to building automation and renewable energy infrastructure.

Yes. Our ultrasonic technology is well-suited for hydrogen carrier fluids, ammonia solutions, and other alternative energy media due to its material compatibility and non-contact measurement principle. We collaborate with hydrogen mobility and power-to-X developers to validate sensor performance against emerging fuel standards. Specific sensor variants are available for cryogenic, high-purity, or corrosive fluid applications.

Absolutely. We work closely with OEM partners to adapt housing designs, optimize flow body geometry, adjust output formats, and develop application-specific firmware. High-volume programs can include custom calibration profiles, private labeling, and co-development of integrated flow modules. Our engineering team supports customers from concept through production to ensure seamless product fit.

Allengra sensors are designed and tested to meet automotive and aerospace vibration standards, including random, sinusoidal, and shock profiles typical of mobile platforms. Our robust mechanical design and advanced signal processing maintain measurement accuracy and reliability under continuous dynamic stress. Validation testing includes long-term durability assessments to ensure performance retention over the product lifecycle.

Yes. Allengra provides comprehensive technical support including integration guidelines, reference implementations, and direct engineering consultation for industrial automation and process control deployments. We assist with system architecture planning, communication protocol configuration, and field commissioning support. For enterprise customers, we offer training programs and long-term partnership agreements to ensure successful scalability.

Our motorsport fuel flow meters measure with accuracy in the ±0.5% range. Allengra is the official flow meter supplier for FIA Formula 1 from 2026 to 2030 and supplies programs in Formula E, WorldSBK, and WEC. Validation follows the homologation procedures of the sanctioning bodies: each unit is calibrated against certified references, endurance-tested under racing vibration and temperature profiles, and sealed so readings stay tamper-proof during competition.

Yes. Our lightweight fuel flow meters weigh under 50 grams and were developed for fixed-wing, multirotor, and hybrid UAV platforms. On-board consumption monitoring with ±0.5% accuracy supports precise range estimation, and the absence of moving parts keeps the measurement reliable under vibration and rapid attitude changes. Push-in fittings and low power draw simplify integration into tight airframes.

Sensors for food and beverage applications use lead-free, food-contact-compliant materials and a smooth flow path without moving parts or dead zones where residue could collect. The fluid is measured acoustically and stays untouched, which suits the hygiene requirements of coffee machines, dispensers, and juicers. The same design principles apply to our flowmeters for potable water, carbonated as well as uncarbonated.

Allengra products are designed and engineered in-house, with manufacturing performed through qualified ISO-certified partners to ensure consistent quality and scalability. Our European supply chain enables responsive customer support and adherence to stringent quality standards. Final testing, calibration, and quality control are conducted at our facilities before shipment to customers worldwide.

Allengra maintains ISO 9001 quality management certification and designs products to comply with relevant CE, RoHS, and REACH directives. Industry-specific certifications such as ATEX, UL, or FDA compliance are pursued based on application requirements and customer demand. We continuously expand our certification portfolio to support entry into regulated markets and safety-critical applications.

Yes. Collaboration with OEMs, research institutions, and technology innovators is central to Allengra's development strategy. Strategic partnerships enable us to stay at the forefront of ultrasonic measurement science and accelerate time-to-market for breakthrough applications.

Technical consultations and quotations can be requested directly through our website contact form or by emailing our sales and engineering teams. We typically respond within one business day with initial guidance and, for complex applications, schedule detailed technical discussions. Sample units and evaluation kits are available for qualified development projects to facilitate rapid prototyping and testing.

Allengra is committed to advancing ultrasonic flow measurement toward greater miniaturization, intelligence, and sustainability. Our roadmap includes AI-enhanced diagnostics, wireless connectivity, and next-generation materials for extreme environments and emerging energy systems. We envision a future where flow sensing becomes seamlessly integrated, self-calibrating, and predictive—enabling smarter, more efficient fluid management across all industries.

Both depend on the degree of customization and the phase of the program. Evaluation samples and development kits ship quickly for qualified projects. For deeper understanding feasibilities studied are offered with functional samples. Volume commitments and ramp-up timelines are agreed during the specification phase, so the fastest way to a concrete schedule is to contact our sales team with your need and target quantities.

It depends on the scope. Adaptations of existing platforms, such as connector, output, or calibration changes, usually carry little or no setup cost. Custom developments that need dedicated engineering work, for example new housings, flow bodies, or application-specific firmware, may involve a one-time engineering contribution. Feasibility studies and industrialization is quoted transparently after reviewing the requirements.

All of the above. OEM programs can cover housing designs and fittings, flow body geometry, output signals (analog, PWM, UART, I²C, Modbus, CAN, LIN), custom calibration profiles for specific fluids and ranges, application-specific firmware, and private labeling. High-volume programs can extend to co-development of fully integrated flow modules. Our engineering team supports the work from concept through serial production.

Yes. We manage the complete development chain in-house, from concept and prototyping through validation and serial production, and several catalogue products started as custom requests, among them flow meters for all kinds of liquids, hydrogen measurement, and R290 leak detection. If the fluid, flow range, or environment is unusual, our engineering team assesses feasibility in a technical consultation.

Three factors drive the decision: how closely a standard platform matches the requirements, the projected volumes, and the timeline. When an existing sensor fits with minor adaptations, the standard route is faster and cheaper for low quantities. Full custom development makes sense when the application needs a unique form factor, fluid, or certification scope and the volumes justify the engineering effort; we evaluate both options with the customer during the specification phase.

Products are designed to comply with CE, RoHS, and REACH as a baseline, within an ISO 9001 quality management system. Application-specific certifications, such as EN IEC 60335-2-40 for R290 heat pumps, ATEX, UL, or MID type approval, are pursued per program depending on the target market. For OEM projects, the certification strategy is planned together with the customer from the start, so the final integrated product passes its own approvals without surprises.