3108 Ultrasonic Flow Transmitter Non-Contact Flow and Level Monitoring

3108 Ultrasonic Flow Transmitter  Non-Contact Flow and Level Monitoring

The Rosemount 3108 Ultrasonic Flow Transmitter is a non-contact, high-performance solution designed for accurate open channel flow and level monitoring. By utilizing advanced ultrasonic technology with integrated temperature compensation, it ensures reliable measurements without direct contact with the process fluid, delivering long-term durability, minimal maintenance, and enhanced safety. Built for industrial and environmental applications, the transmitter offers 4–20 mA with HART® communication for seamless integration into existing control systems, while its rugged, weatherproof IP68 construction guarantees dependable operation in harsh outdoor environments. With its intuitive configuration, proven accuracy, robust design, and versatile application capability, the Rosemount 3108 enables operators to achieve precise flow measurement, optimized process efficiency, and reduced operational costs.

Key Features

1. Non-contact ultrasonic measurement – ensures safety, no wear, and minimal maintenance.
2. Accurate open channel flow and level monitoring – optimized for weirs, flumes, and wastewater applications.
3. Remote temperature probe – provides automatic sound velocity correction for improved accuracy.
4. 4–20 mA with HART® communication – seamless integration into control and monitoring systems.
5. Rugged IP68 housing – reliable operation in harsh outdoor and submerged environments.
6. Easy installation and configuration – reduces commissioning time and simplifies setup.
7. Proven reliability and long service life – designed for industrial and environmental applications.

Typical Applications

• Open Channel Flow Measurement
• Monitoring flow in weirs and flumes
• Wastewater treatment plants and stormwater channels
• Environmental Monitoring
• River, canal, and irrigation flow measurement
• Surface water and effluent discharge compliance
• Industrial Water Management
• Cooling water flow monitoring
• Process water distribution in plants
• Municipal Infrastructure
• Sewer and drainage flow monitoring
• Reservoir and retention pond inflow/outflow tracking
• Level + Flow Combined Applications
• Tank level measurement with flow calculation
• Pump control and overflow protection

Frequently Asked Questions (FAQ)

Q1: What is the Rosemount 3108 Ultrasonic Flow Transmitter used for?

A1: It is designed for non-contact open channel flow and level monitoring, commonly applied in wastewater treatment, environmental monitoring, and industrial water management.

Q2: How does the 3108 measure flow?

A2: The transmitter uses ultrasonic pulses to measure the distance to the liquid surface. When combined with a weir or flume, it calculates flow rate based on the measured level and standardized hydraulic equations.

Q3: What makes the 3108 different from the 3107?

A3: While both are ultrasonic transmitters, the 3108 is optimized for flow measurement with a remote temperature probe for improved accuracy, whereas the 3107 is primarily a level transmitter with basic flow capability.

Q4: What communication options are available?

A4: The 3108 provides a 4–20 mA output with HART® communication, allowing seamless integration into control and monitoring systems.

Q5: Can it be used in harsh environments?

A5: Yes. The IP68-rated housing ensures reliable operation in outdoor, submerged, or corrosive conditions.

Q6: Does it require frequent maintenance?

A6: No. Being a non-contact device, it avoids wear and fouling, resulting in minimal maintenance and long service life.

Q7: What industries typically use the 3108?

A7: It is widely used in municipal wastewater treatment, stormwater monitoring, irrigation systems, industrial process water, and environmental compliance applications.