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In the process and environmental industries, accurate liquid level measurement is non-negotiable. The Endress+Hauser FMX21-AA221FGB10A Waterpilot FMX21 is a premier hydrostatic pressure transmitter designed to deliver reliable performance in demanding applications, from deep wells and groundwater monitoring to wastewater treatment and ballast water tanks. Built around a maintenance-free ceramic sensor, this probe ensures precise level readings even under challenging conditions. We are pleased to offer this specific model, the FMX21-AA221FGB10A, in stock and ready for immediate shipment to keep your projects on schedule .
Key Technical Specifications
The FMX21 series is renowned for its robustness and flexibility. The model FMX21-AA221FGB10A adheres to the high standards of the Waterpilot family, offering the following core specifications:
Measuring Principle: Hydrostatic pressure (capacitive, oil-free ceramic cell) .
Sensor: High-purity ceramic (99.9% Al₂O₃) with inherent overload resistance .
Pressure Measuring Range: Capable of measuring up to 200 m H₂O (656 ft H₂O), with standard ranges from 100 mbar to 20 bar .
Accuracy: Standard reference accuracy of ±0.2% ; optional Platinum version available at ±0.1% .
Output Signal: 4...20 mA with superimposed HART 6.0 protocol , allowing for remote configuration and diagnostics .
Process Temperature: -10 to 70°C (14 to 158°F) .
Power Supply: 10.5 to 35V DC .
Housing Options: Available in various diameters (22 mm, 29 mm, 42 mm) to suit different applications and pipe sizes .
Why Choose the Waterpilot FMX21?
The FMX21 stands out in the market due to its unique combination of sensor technology and intelligent features. Here is why the FMX21-AA221FGB10A is the smart choice for your level measurement needs:
1. Oil-Free Ceramic Sensor for Maximum Reliability
Unlike traditional oil-filled sensors, the Waterpilot FMX21 utilizes a capacitive, oil-free ceramic cell. The high-purity ceramic (99.9% Al₂O₃) provides exceptional resistance to overload and vacuum, ensuring that the sensor maintains its long-term stability and does not drift over time. This design also eliminates the risk of oil contamination, making it safe for drinking water applications certified to standards like NSF, KTW, and ACS .
2. Automatic Density Compensation (ADC)
One of the most significant challenges in hydrostatic level measurement is fluctuating media density. The FMX21 addresses this with an optional built-in Pt100 temperature sensor. By measuring temperature and pressure simultaneously, the transmitter can perform automatic density compensation, providing highly accurate level readings even when the density of the liquid varies—a critical feature for tanks with changing contents or varying temperatures .
3. Climate-Proof and Robust Design
Designed for submersible use, the FMX21 is built to last. The electronics are completely potted, and the system features a dual-filter pressure compensation system for the reference air. This design prevents humidity and moisture from penetrating the sensor, effectively eliminating a common failure point in competitive products .
4. Versatile Application Range
With a small diameter of just 22 mm (0.87"), it is perfect for small-diameter boreholes and wells. Heavier duty versions (42 mm) with flush-mounted diaphragms are ideal for wastewater and sludge applications, while coated versions (29 mm) are available for corrosive saltwater environments .
In Stock and Ready to Ship
Delays in equipment procurement can stall critical operations. We currently have the Endress+Hauser FMX21-AA221FGB10A available in our inventory. As a member of the Waterpilot FMX21 family, this model promises the same legendary quality, backed by Endress+Hauser’s commitment to excellence and typically covered by an extended warranty option .
Contact us today to order or to request a quote. Ensure your facility benefits from precise, reliable liquid level measurement with the industry-leading Waterpilot FMX21.
