Product Short Description
Product Series
Panametrics MMY30 Clamp-On Ultrasonic Flow Measurement System
Product Brief
Clamp-on non-intrusive ultrasonic liquid flow transmitter for volumetric flow measurement of clean and lightly aerated industrial liquids, installed externally on pipe outer surface without process shutdown or pipe cutting.
Description
Technical Specifications
- Pipe Diameter Compatibility: DN25 to DN300 metal and plastic piping
- Measurement Flow Velocity Range: 0.01 m/s to 15 m/s bidirectional flow
- Measurement Accuracy: ±0.5 % of reading for clean single-phase liquids
- Ultrasonic Transducer Frequency: 1 MHz clamped external transducers
- Output Interfaces: 4–20 mA analog output, Modbus RTU RS485 digital communication, pulse frequency output
- Power Supply: DC 12 V to DC 36 V wide range industrial power input
- Operating Temperature: Transducer -40 °C to +120 °C; Transmitter electronics -20 °C to +60 °C
- Enclosure Protection Class: IP66 NEMA 4X aluminum transmitter housing
Functional Features
- Non-intrusive clamp-on installation with zero process fluid contact, no pressure drop generation
- Bidirectional flow measurement with automatic forward/reverse flow sign detection
- Built-in liquid sound speed library for water, glycol, crude oil, diesel and industrial solvents
- Totalizer function for accumulated volumetric flow with non-volatile memory storage
- Self-diagnostic signal strength monitoring for transducer coupling degradation alarm
- Onboard local LCD display for live flow rate, total volume and diagnostic status readout
Structural Characteristics
- Transmitter enclosure: Die-cast aluminum alloy with powder coated corrosion resistant finish
- Transducer bodies: Stainless steel AISI 316 with high-temperature coupling pad
- Mounting hardware: Stainless steel pipe clamp brackets for permanent transducer fixation
- Internal circuit: Temperature compensated DSP ultrasonic signal processing unit
Working Principle
Transmits paired ultrasonic sound waves upstream and downstream across pipe wall; calculates differential sound wave transit time difference to compute fluid flow velocity, multiplies by calibrated pipe internal cross-sectional area to output volumetric flow rate value.
Advantage Highlights
- No pipe cutting, process shutdown or fluid containment breach required for installation
- Compatible with all metal and thermoplastic industrial piping material
- IP66 NEMA 4X housing supports outdoor field mounting without protective cabinet
- Wide fluid temperature range via high-temperature stainless steel transducer variant
- Bidirectional flow measurement suited for recirculation and reversible pump systems
Applicable Industries
Water & wastewater treatment plant flow metering, district heating glycol circulation measurement, refinery crude oil pipeline monitoring, food processing liquid transfer, HVAC chilled water flow control
Installation Requirements
- Mount transducers on straight pipe section with minimum 10 x pipe diameter upstream straight run, 5 x pipe diameter downstream straight run
- Apply factory specified ultrasonic coupling grease between transducer and pipe outer surface
- Ground aluminum transmitter housing to facility protective earth bus bar
- Route signal cable separate from high-current variable frequency drive power wiring
Operation Precautions
- Reapply coupling grease every 12 months for outdoor high-temperature pipe installations
- Avoid transducer mounting adjacent to pipe elbows, valves, pumps or flow restriction fittings
- Calibrate liquid sound speed parameter after process fluid composition change
- Protect transmitter LCD display from direct continuous UV sunlight exposure outdoors
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