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Endress+Hauser FMU40 Ultrasonic Level Meter Prosonic M FMU40 Ultrasonic Level Transmitter

The FMU40 Radar Level Transmitter, a high-performance non-contact measuring instrument belonging to the Prosonic series, is professionally developed by Endress+Hauser to provide accurate, reliable and cost-efficient level monitoring solutions for diverse industrial applications. Featuring a compact structure, advanced measurement technology and superior environmental adaptability, it has become the first choice for level measurement of liquids, pastes and bulk solids in various harsh industrial environments, successfully addressing the drawbacks of traditional level measuring instruments such as poor stability, cumbersome maintenance and low accuracy.

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Whatsapp : +86 17391983629‬

Email : Jayna@xinyiyb.com

Product Description

1. Core Measurement Principle & Technical Advantages

Based on the advanced ultrasonic time-of-flight (TOF) measurement principle, the FMU40 emits ultrasonic pulses through its sensor; these pulses are reflected by the surface of the measured medium and then received by the sensor. The transmitter precisely calculates the distance between the sensor and the medium surface according to the time interval of pulse transmission and reception, and converts it into level, volume or flow data through the built-in signal processing system for output. This non-contact measurement method avoids direct contact with the measured medium, fundamentally eliminating wear, corrosion and pollution caused by contact measurement, thus significantly extending the instrument's service life.

Equipped with an integrated temperature sensor, the FMU40 can automatically correct the sound velocity affected by temperature changes, ensuring high measurement accuracy even in environments with large temperature fluctuations. It boasts an excellent measurement accuracy of ±2 mm or ±0.2% of the set measuring range, which can accurately capture subtle changes in liquid level and provide reliable data support for industrial process control and inventory management. In addition, the transmitter is equipped with a 32-point linearization function, which can flexibly convert measured values into any unit of length, volume or flow rate to meet the diverse measurement needs of different industries.

2. Key Technical Specifications

Measurement Range: For liquids, the range is 0.25m to 5m (0.8ft to 16ft); for bulk solids, it is 0.25m to 2m (0.8ft to 6.6ft). The blocking distance is 0.25m (0.8ft) for all media types.
Temperature Range: Both ambient and process temperatures range from -40°C to 80°C (-40°F to 176°F), enabling stable operation in extremely cold and high-temperature environments.
Pressure Range: The maximum absolute process pressure is 0.7 bar to 3 bar (10 psi to 44 psi), suitable for various pressure conditions at industrial sites.
Material & Protection: The main wetted parts are made of PVDF, which has excellent chemical resistance and can resist corrosion from various aggressive media. With an IP68 protection rating, the instrument achieves complete dustproof and long-term waterproof performance, even capable of normal operation when submerged in water up to 3m, effectively adapting to harsh environments such as rain, dust and humidity.
Communication & Power Supply: It supports 4-20mA HART communication and can be optionally equipped with PROFIBUS PA or Foundation Fieldbus, realizing seamless integration with industrial control systems for convenient remote monitoring and parameter adjustment. Available in two-wire or four-wire integrated transmitter designs, it adapts to different on-site power supply conditions.
Certifications: It has obtained international certifications including ATEX, FM, CSA, TIS, INMETRO and NEPSI, and is suitable for explosive hazardous areas (gas-Ex, dust-Ex), ensuring safe operation in dangerous industrial environments such as petrochemical and chemical industries.

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Pressure Transmitters for Industrial Pressure Measurement

Name: Endress+Hauser FMU40 Ultrasonic Level Meter Prosonic M FMU40 Ultrasonic Level Transmitter
SKU: 50

Xinyi Instrument supplies pressure transmitters for process control, hydraulic systems, petrochemical plants, water treatment, HVAC, power generation and general industrial pressure monitoring. Our pressure transmitter range covers gauge pressure, absolute pressure, differential pressure, high temperature media and digital communication applications.

Choose from compact pressure transmitters, smart 3051 differential pressure transmitters, diaphragm seal models, RS485 digital pressure transmitters and high frequency dynamic pressure sensors. Standard outputs include 4-20 mA, voltage output, HART and RS485 Modbus options, with stainless steel wetted parts and custom process connections available on request.

Pressure Transmitter Parameters

Pressure Types	Gauge, absolute, negative pressure, differential pressure
Measuring Range	From low differential pressure to high pressure ranges up to 100 MPa, depending on model
Output Signals	4-20 mA, 0-5 V, 1-5 V, 0-10 V, RS485 Modbus, HART options
Accuracy	Typical options include 0.1%, 0.2%, 0.25% and 0.5% FS
Process Connection	M20 x 1.5, G1/4, G1/2, NPT and customized thread connections
Wetted Materials	Stainless steel, 316L diaphragm and corrosion-resistant sealing options
Media	Water, oil, gas, air, steam and compatible liquid or gas media
Applications	Pipeline pressure, tank level, flow differential pressure, hydraulic pressure and automation systems

Recommended Pressure Transmitter Series

Xinyi YW-150 - differential pressure transmitter for stable industrial measurement.
Xinyi YW-3051DP - smart differential pressure transmitter for process control.
Xinyi YW-130 / YW-140 - compact pressure transmitters for general pressure monitoring.
RS485 Digital Pressure Transmitter - Modbus communication for remote monitoring systems.
High Temperature Pressure Transmitter - designed for hot media and demanding process conditions.
Siemens, Yokogawa and ABB Options - international brand transmitters available for project matching.

Pressure Transmitter FAQ

What is a pressure transmitter used for?

A pressure transmitter converts the pressure of liquid, gas or steam into a standard electrical signal for PLC, DCS, recorder or control instrument input. It is widely used for pipeline pressure, tank level, flow measurement and process safety monitoring.

How do I choose the right pressure transmitter?

Confirm the pressure range, pressure type, medium, temperature, output signal, accuracy, installation thread, electrical connection and environmental requirements. For corrosive media, high temperature or sanitary applications, diaphragm material and sealing structure are especially important.

What is the difference between gauge, absolute and differential pressure transmitters?

Gauge pressure transmitters measure pressure relative to atmospheric pressure. Absolute pressure transmitters measure pressure relative to vacuum. Differential pressure transmitters measure the pressure difference between two points and are commonly used for flow, filter and level measurement.

Can Xinyi Instrument provide customized pressure transmitters?

Yes. Xinyi Instrument can support customized pressure ranges, process connections, output signals, cable length, display options and model selection for different industrial applications.