Electromagnetic flow meter LFLLD

volumefor waterfor wastewater

Product overview
The LFLLD insertion electromagnetic flowmeter provides accurate, cost-effective flow measurement for conductive liquids in large-diameter pipelines. Designed for easy insertion and retrofit, it supports bi-directional measurement, automatic range switching and multiple output options (4–20 mA, impulse, Modbus RS485, HART), making it suitable for water supply, wastewater, irrigation, drainage and industrial process monitoring.

Features

• Insertion design enables simple installation and economical pipeline flow monitoring without removing sections of pipe.
• Operates reliably on conductive liquids with conductivity ≥ 50 μS/cm; performance remains stable despite conductivity variations.
• Modular sensor and converter design with compact mechanics; converter and sensor are interchangeable and measuring range adjustable from 0.5 to 10 m/s (configurable).
• Measurement depends on insertion depth only, providing interchangeability across different pipe sizes and compatibility with standard secondary meters. Output options: 4–20 mA, impulse, Modbus RS485, HART.
• Automatic range switching maintains measurement accuracy over varying flow conditions.
• Supports forward and reverse flow calculation; factory default: forward measurement.
• Configurable upper/lower instantaneous flow alarms with optional audible alarm or relay output.
• Empty-pipe detection triggers alarm when instantaneous flow is zero.
• Power-loss protection: parameters and cumulative values retained in EEPROM during power interruptions.
• Small-signal filtering: adjustable lower voltage or flow thresholds to remove noise and interference.
• Automatic zeroing eliminates electrochemical interference and stabilizes the zero point.
• Sensor variants and installation methods include IP68-rated submersible options for buried or submerged installation.

Specification
Nominal diameter: 300–3000 mm
Flow rate range: 0.1–10 m/s
Accuracy: 0.5–10 m/s: ±1.5% FS; 0.1–0.5 m/s: ±2.0% FS; alternative spec: 0.1–10 m/s: ±2.5% FS (FS = 40–100% full range)
Minimum conductivity: > 50 μS/cm
Straight pipe requirements: upstream 10DN, downstream 5DN
Medium temperature: -20°C to 80°C
Operating temperature: -10°C to 60°C
Pressure rating: up to 1.6 MPa
Protection: IP65 (integrated/split), IP68 (split, submersible)
Electrode material: 316L stainless steel
Sensor material: 201 stainless steel
Output signals: 4–20 mA, impulse, Modbus RS485, HART
Power supply: 20–36 VDC, 85–250 VAC or battery
Power consumption: < 20 W

Technical characteristics / specifications

• Model / Denomination: LFLLD
• Nominal diameter range: 300–3000 mm
• Measuring range: 0.1–10 m/s
• Minimum fluid conductivity: > 50 μS/cm
• Electrode material: 316L stainless steel
• Sensor material: 201 stainless steel
• Protection: IP65 (integrated/split), IP68 (split, submersible)
• Power supply options: 20–36 VDC, 85–250 VAC, battery
• Outputs: 4–20 mA, impulse, Modbus RS485, HART
• Operating temperature range: -10°C to 60°C (medium up to -20°C to 80°C)
• Pressure rating: up to 1.6 MPa