Overview
The Siemens 7ML11270EA50 XPS-40 ultrasonic level transducer uses advanced ultrasonic technology to measure levels in a wide range of liquids and solids. This continuous, non-contact sensor is part of Siemens’ proven Echomax XPS product line, engineered for industrial automation and process instrumentation applications where reliability and low maintenance are critical.
Key Features
- Wide measuring range: 0.9 to 40 m (3 to 130 ft) enables deployment in deep tanks, reservoirs, and open channels
- Self-cleaning design: Piezoelectric transducer face automatically shakes clean of dust and buildup, reducing service calls
- Chemical and steam resistant: Operates reliably in corrosive and wet environments without degradation
- Flangeless installation: Can be mounted without flanges, simplifying integration into existing systems
- Hermetically sealed construction: Protects internal electronics from moisture ingress and environmental contamination
- Integral temperature compensation: Maintains accuracy across ambient temperature variations
Technical Specifications
- Model: XPS-40
- Measurement Type: Continuous, non-contact ultrasonic
- Measuring Range: 0.9 to 40 m (3 to 130 ft)
- Operating Frequency: 22 kHz
- Beam Angle: 6°
- Maximum Ambient Temperature: +95 °C (+203 °F)
- Applicable Media: Liquids and solids
- Installation: With or without mounting flanges (1½” or 6″/8″ ASME/EN available)
- Cable Lengths Available: 5 m, 10 m, 30 m, 50 m, 100 m options
- Protection: Hermetically sealed; self-cleaning piezoelectric face
- Temperature Range: -40 to +95 °C (-40 to +203 °F)
Typical Applications
The Siemens XPS-40 transducer is ideal for:
- Wastewater treatment plants and pump stations (level control and overflow detection)
- Chemical storage and process tanks (resistant to aggressive liquids)
- Bulk material handling in hoppers, silos, and chutes (solids measurement)
- Water utilities and reservoir monitoring (open channels and wet wells)
- Marine and offshore applications (ballast tanks, bilge monitoring)
- Food processing and beverage industry (hygiene-friendly, flange-compatible)
Compatibility & Replacements
The Siemens 7ML11270EA50 is part of the Echomax XPS modular product family. Other models in the XPS line (XPS-10, XPS-15, XPS-30) offer shorter ranges (10 m, 15 m, 30 m respectively) for applications that do not require the full 40 m range of the XPS-40. Existing installations using earlier Siemens ultrasonic level transmitters may be retrofitted with the XPS-40 using appropriate adapters and reconfigured control logic. The transducer output and electrical interface comply with standard industrial protocols, making it compatible with most PLC, DCS, and SCADA systems through standard 4-20 mA or digital interfaces (when paired with compatible converters).
