Overview

The RIF600W is a wall-mounted ultrasonic flow meter manufactured by Riels Instruments Srl. It employs a clamp-on transit-time correlation technique, allowing non-intrusive measurement of liquid flow by clamping ultrasonic transducers on the outside of pipes without fluid contact. The transmitter and transducers are installed separately, with the transmitter suitable for indoor installation.

Applications

• Chemical addition
• Cooling and heating water
• Drinking and potable water
• Refined hydrocarbons
• De-ionized and demineralized water
• Sanitary flow rate measurements
• Purified water

Key Features

• High Accuracy: Better than ±1%
• Wide Measurement Range: Suitable for pipe diameters DN15 to DN6000 mm with different sensor models
• High Reliability: Low voltage, multi-pulse radiating circuit enhances accuracy, lifetime, and reliability
• Strong Anti-Interference: Double balanced differential signal transmission and receiving circuits resist interference from power lines and other sources
• Powerful Memory Functions: Automatic cumulative flow memory for up to 10 years, power on/off events, and working conditions
• Temperature Sensor Support: Enables heat flow measurement
• SD Card Support: Optional mass data storage capability

Technical Specifications

Transmitter

• Measurement Principle: Ultrasonic transit-time with IEEE754 floating-point arithmetic
• Accuracy: Better than ±1%
• Display: LCD with Italian and English language options
• Outputs: One 4-20mA current output (0-1K impedance, 0.1% accuracy), one OCT pulse output (6-1000ms width, default 200ms), one relay output
• Inputs: Three 4-20mA current inputs (0.1% accuracy) for temperature, pressure, level signals; supports three-wire PT100 platinum resistance temperature sensors
• Data Interface: Isolated RS485 supporting Modbus protocol and firmware upgrades via PC
• Cable Length: Standard up to 50m; RS485 communication can extend transmission distance beyond 1000m

Pipe and Medium Conditions

• Pipe Materials: Steel, stainless steel, cast iron, copper, PVC, aluminium, FRP, with liners allowed
• Pipe Diameter: 15 to 6000 mm
• Installation Requirements: Upstream 10D, downstream 5D straight pipe lengths; 30D distance from pump outlet (D = pipe diameter)
• Fluid Types: Water, seawater, acidic liquids, beer, alcohol, oil, and other sonic-transmissive liquids
• Fluid Temperature Range: -30°C to 160°C
• Turbidity: Up to 10,000 ppm with minimal bubbles
• Velocity Range: ±10 m/s

Operating Environment

• Transmitter Temperature: -20°C to 60°C
• Transducer Temperature: -30°C to 160°C
• Humidity: Transmitter up to 85% RH
• Protection Grade: Transmitter IP65; Clamp-on sensors IP68 (water depth < 2m)
• Power Supply: DC 8-36V or AC 85-264V
• Power Consumption: 1.5W

Measurement Types and Installation

Transducers

Three clamp-on transducer models are available for different pipe sizes and temperature ranges:

• Small TS-2-HT: DN15 to DN100, -30°C to 160°C, dimensions 45x25x32 mm
• Medium TM-1-HT: DN50 to DN700, -30°C to 160°C, dimensions 64x39x44 mm
• Large TL-1-HT: DN300 to DN6000, -30°C to 160°C, dimensions 97x54x53 mm

Temperature Sensors

Various three-wire PT100 temperature sensors are available for heat flow measurement, differing in installation requirements and temperature ranges:

• Clamp Temperature Sensor CT-1: For pipes ≥ DN50, -40°C to 160°C, no pipe cutting needed, accuracy ±0.8°C, temperature difference ≤ 0.1°C after calibration
• Insertion Temperature Sensor TCT-1: For pipes ≥ DN50, -40°C to 160°C, requires pipe cutting
• Pressure Installation Insertion Sensor PCT-1: For pipes ≥ DN50, -40°C to 160°C, no pipe cutting needed
• Small Size Insertion Sensor SCT-1: For pipes < DN50, -40°C to 460°C, requires pipe cutting

Clamp-on Sensor Components

The clamp-on transducer assembly includes key parts such as fastening belts, steel wire slots, top cover bolts, signal emission direction arrow, sound wedge, powerful magnets, anti-skid slots, cable entry, wiring terminals, and grounding points to ensure secure installation and reliable signal transmission.

Summary

The RIF600W ultrasonic clamp-on flow meter offers a highly accurate, reliable, and non-intrusive solution for measuring liquid flow across a wide range of pipe sizes and fluid types. Its advanced features include strong anti-interference capabilities, extensive memory functions, and support for heat flow measurement via temperature sensors. The modular design with separate transmitter and transducers facilitates flexible installation, while multiple sensor options accommodate diverse industrial applications.