Transit time ultrasonic flow meter for clean liquids

The technology has inherent advantages over alternate ultrasonic devices including: low-cost, easy installation, no pressure head loss, no moving parts to maintain or replace, no fluid compatibility issue, and a wide measuring range that ensures reliable readings over liquid velocities from 0.1 to 6 metres/sec. The series is designed to work on PVC, PP and UPVC pipe systems.

The flow meter has a powered (sourced) 4 to 20 mA analogue output which shares a common ground with the power supply. The output transmits a continuous current signal that is proportional to liquid flow rate. The output is scaled at the factory; to ensure that the instrument or data acquisition system that is receiving the 4 to 20 mA signal responds properly, it must be spanned identically to the flow.

Features include:

• “Clip-On" Design, Clamps Around Pipe For Simple Installation
• Models for Pipe Sizes From DIN 15 to DIN 300
• Local Display of Flow Rate and Total
• 4 to 20 mA Retransmission of Flow Rate
• RS485 Communications (Modbus®)
• For Most Clean Liquids
• IP54 Rated Enclosure (NEMA 3)

Specifications:

• Flow Range: 0.1 to 6 m/s (0.3 to 19 ft/s)
• Accuracy: ±1.5% FS
• Repeatability: 0.3%
• Measuring Liquid: Clean water based
• Pipe Material: PVC-U/PP-R
• Protection Rate: NEMA 3 (IP54)
• Power Supply: 10 to 36 Vdc, at 500 mA maximum
• Output: 4 to 20 mA (zero to full scale)
• Communications: RS485 (Modbus)
• Temperature Range:
  • Transmitter/Transducer: 0 to 50°C
• Humidity: Up to 99% RH non-condensing
• Housing: ABS plastic enclosure
• Power Supply Cable: 3 metres long
• Display: Liquid Crystal (LCD)
• Weight: 0.5 kg