Endress+Hauser CUS71D-AA1A Ultrasonic Level Transmitter All-in-One Compact Solution

The Endress+Hauser CUS71D-AA1A is a versatile, compact ultrasonic level transmitter designed for non-contact, continuous level measurement in a wide range of liquids. Ideal for storage tanks, process vessels, and open channel flow applications, this robust instrument delivers reliable, maintenance-free performance even in challenging environments. Its all-in-one, compact housing simplifies installation and makes it a cost-effective solution for diverse industries, including water and wastewater, chemical, food and beverage, and pharmaceuticals.

Technical Specifications

Model: CUS71D-AA1A

Measurement Principle: Non-contact ultrasonic pulse reflection

Range: Up to 8 m (26 ft)

Accuracy: ±0.15% of measured value or ±3 mm (±0.12 in), whichever is greater

Process Temperature: -40 to 80 °C (-40 to 176 °F)

Process Pressure: Up to 3 bar (43.5 psi)

Frequency: 75 kHz (for narrow beam focusing and reduced interference)

Beam Angle: 7° (narrow beam)

Enclosure Rating: IP66/68, NEMA 4X, Type 316L stainless steel

Output: 4…20 mA HART, two-wire

Power Supply: 12…30 V DC

Display: Optional integrated, two-line, backlit LCD (configurable)

Mounting: Thread, flange, or proprietary "Easy Mount" system

Key Features & Advantages

All-in-One Compact Design

The transmitter and sensor are integrated into a single, rugged housing. This compact design eliminates the need for separate sensor electronics, simplifies installation, reduces potential leak points, and lowers overall project costs.

Exceptional Reliability & Robustness

Built with high-grade stainless steel and offering superior ingress protection (IP66/68), the CUS71D is resistant to harsh weather, aggressive atmospheres, and high-pressure cleaning. It provides stable measurement in applications with condensation, foam, or light vapors.

Intelligent Echo Processing & False Echo Suppression

Endress+Hauser's advanced signal processing algorithms (Echomaxx) reliably identify the true level echo amidst fixed targets (e.g., ladders, agitators) or electrical noise, ensuring consistently accurate readings and minimizing commissioning time.

Easy Commissioning & Operation

Intuitive setup is possible directly via the optional local display or via the universal FieldCare or DeviceCare configuration tools using HART communication. The "Easy Mount" system allows for fast, secure mounting and alignment.

Low Maintenance & High Cost Efficiency

As a non-contact device, it is wear-free and requires virtually no maintenance. Its reliability reduces downtime, while the energy-efficient two-wire design minimizes operational costs.

Typical Applications

Level measurement in water and wastewater tanks (clear water, sewage, sludge)

Chemical storage and process tanks

Food and beverage storage vessels

Cooling water and lubricant tanks

Open channel flow measurement (with integrated flow calculator)

Why Choose the Endress+Hauser CUS71D-AA1A?

The CUS71D-AA1A is the go-to choice for engineers seeking a simple, reliable, and economical ultrasonic level transmitter. It combines Endress+Hauser's renowned measurement expertise with a user-friendly, compact design. Whether for a new installation or a straightforward replacement, it delivers performance you can trust to optimize inventory management, prevent overfills, and ensure process safety.

Available for Immediate Delivery

We are pleased to confirm that the Endress+Hauser CUS71D-AA1A Ultrasonic Level Transmitter is in stock and ready for fast shipment to support your project timelines.

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