Endrress+Hausser Ultrasonic Measurement Time-of-Flight Prosonic Fdu90 Ultrasonic Sensor

Product Description

Products Picture

Specification

E/H Ultrasonic Measurement Time-of-Flight Prosonic FDU90 Ultrasonic Sensor
Parameter	Specification
Sensor Type	Non-contact ultrasonic level sensor
Measuring Range	0.5 to 15 meters (1.6 to 49.2 feet)
Accuracy	±1 mm (±0.04 in) under normal conditions
Output Signal	4–20 mA (HART protocol), Pulse/IO-Link (optional)
Power Supply	24 V DC (standard), 230 V AC (optional)
Material	Polypropylene (PP), PVDF, or stainless steel (depending on model)
Operating Temperature	-40°C to +70°C (-40°F to +158°F)
Process Connection	Threaded (G1½, G2) or flanged (DN50/DN80/DN100)
Protection Rating	IP67 (standard), IP68 (optional)
Explosion Protection	ATEX, IECEx, FM, CSA (for hazardous areas)
Signal Processing	Advanced echo processing with interference suppression
Response Time	Adjustable (0.2–30 seconds)
Mounting Requirements	Minimum distance from tank wall: 30 cm (12 in)
Power Supply	90–250 V AC or 18–36 V DC (loop-powered for 4–20 mA)
Response Time	Adjustable (0.2–100 seconds)
Environmental Conditions	Operating temperature: -40°C to +70°C; Humidity: 0–100% RH (non-condensing)
Approvals & Certifications	ATEX, IECEx, FM, CSA, IP68, SIL 2/3 compliant

Product Description

E/H Ultrasonic Measurement Time-of-Flight Prosonic FDU90 Ultrasonic Sensor 

The E/H Prosonic FDU90 Ultrasonic Sensor from Endress+Hauser represents a cutting-edge solution for accurate and reliable non-contact level measurement in diverse industrial environments. Designed for challenging applications, this ultrasonic sensor combines robust construction, advanced signal processing, and versatile communication options to deliver consistent performance across liquids, slurries, and bulk solids. With its Time-of-Flight (ToF) measurement principle, the FDU90 ensures precise detection of material levels in tanks, open channels, and storage vessels, even under harsh conditions such as foam, vapor, or temperature extremes.

Key Features and Technical Capabilities The Prosonic FDU90 operates on the Time-of-Flight principle, emitting high-frequency ultrasonic pulses that reflect off the target surface and return to the sensor. By calculating the time elapsed between pulse emission and echo reception, the device determines the distance to the material surface with millimeter-level accuracy. This method eliminates direct contact with the measured medium, reducing maintenance needs and extending service life—essential for corrosive, viscous, or abrasive substances.

The sensor offers a wide measuring range of 0.5 to 15 meters (1.6 to 49.2 feet), making it suitable for small tanks to large-scale industrial reservoirs. Its precision is exceptional, with an accuracy of ±1 mm under standard conditions, ensuring reliable data for process control and inventory management. The FDU90 supports multiple output signals, including 4–20 mA with HART 7 protocol, pulse outputs, and IO-Link (optional), enabling seamless integration into PLCs, SCADA systems, and modern IIoT frameworks. Power options include 24 V DC (standard) or 230 V AC (optional), catering to diverse operational requirements.

Durability and Environmental Adaptability Engineered for resilience, the FDU90 features a choice of materials—polypropylene (PP), PVDF, or stainless steel—to withstand aggressive chemicals, high-pressure cleaning, and abrasive environments. Its housing meets IP67 protection standards (IP68 optional), ensuring dust and water ingress resistance, while certifications like ATEX, IECEx, FM, and CSA allow deployment in hazardous zones. 

The Prosonic FDU90 is ideal for industries requiring precise level monitoring in challenging conditions:

Water/Wastewater: Measuring levels in clarifiers, basins, and effluent tanks.
Chemicals: Monitoring corrosive liquids like acids, solvents, and caustics.
Oil & Gas: Tracking storage of hydrocarbons, crude oil, or refined fuels.
Food & Beverage: Ensuring hygiene-compliant level control for liquids and semi-liquids.
Mining/Minerals: Managing slurries and abrasive slurries in processing plants.
User-Friendly Installation and Maintenance Installation is streamlined with threaded (G1½, G2) or flanged (DN50/DN80/DN100) process connections. The sensor requires a minimum distance of 30 cm (12 inches) from tank walls to avoid interference. Configuration is simplified via HART communication, DeviceCare software, or local push-buttons, allowing easy adjustment of measurement ranges, damping settings, and diagnostic thresholds.

Maintenance demands are minimal due to the non-contact design, though periodic cleaning may be required in environments prone to dust, condensation, or fouling. The sensor's self-diagnostics continuously monitor signal quality and alert users to potential issues, minimizing unplanned downtime.

Certifications and Compliance The FDU90 adheres to international standards, including EN 60751, EN 61000-6-2, and SIL2 certification for safety-critical systems. It also complies with FDA and NSF regulations, making it suitable for food-grade applications.

Why Choose the Prosonic FDU90? Endress+Hauser's reputation for innovation and quality is embodied in the FDU90, which offers:

Reliability in Harsh Conditions: Corrosion-resistant materials and environmental resilience.
Precision at a Distance: High accuracy over extended ranges.
Seamless Integration: Flexible communication protocols for modern control systems.
Cost-Effective Operation: Reduced maintenance and long-term durability.
The Prosonic FDU90 is more than a sensor—it is a comprehensive solution for optimizing process efficiency, ensuring safety, and minimizing operational costs. Whether managing critical chemical inventories or monitoring wastewater levels, this ultrasonic sensor delivers the performance and dependability that industries worldwide trust.

Company Profile

Company Profile

KeRul (WeiFang) Automation Equipment Co., Ltd. is speciallzed in industrialautomation instrument development, production and sales, technical servicesand supporting equipment supply of specialized companies, The mainproducts are fow meters, level meters, temperature meters, pressuremeters, electrical meters, thermal meters, programmable controller(PLC), Dcs distributed control system, eight series of more than 1,000specifcations. its products and technologies are widely used in electrlcpower, metallurgy, petrochemical, environ. mental protection, plastics,food,l printing, tobacco, textile, dyeing and other fields.

Our Service

OEM / ODM services
To meet the user diversified requirement, Holykell have established a set of customer service and technical support system with OEM / ODM order as the center, and responded and Handle the customer's requirements in a timely manner to ensure accurate delivery time and product quality.
Order services
Fastest reply:Professional sales engineers 7/24 online services
Payment terms:T/T ,Western union, Paypal, Credit Card, L/C others
Fast delivery: within 24 hours release the cargo (normal spec.), Customized 7-12 days after payment .
 
MAINTENANCE & AFTER-SALES SERVICES
Customer Feedback:  Sales engineers and technical engineers will be one-on-one service for you to exclude all obstacles when use our sensors.
Warranty period: 12 months
Product life-long maintenance: Holykell can provide you with the maintenance of the whole life of the sensors

Packaging & Shipping

FAQ

Q: How long will you give me the reply? 
A: We will reply to you as soon as we see the information 
Q: What is the delivery time? 
A:The products in stock will be shipped after receiving the payment, and the products that need to be ordered are subject to the factory time. 
Q: How about your package? 
A: Do not worry about the package, we have rich experience in packing.
Q: How about the payment terms? 
A:You can choose T/T.