Remote Type Electromagnetic Flow Meter

Parameter Category

Specification

Basic Principle

Faraday's Laws of Electromagnetic Induction

Measuring Medium

Electrically conducting liquids, caustic liquids, liquid-solid mixtures

Applicable Industries

Petroleum, chemical engineering, pharmacology, papermaking, electric power, environmental protection, water/waste water, food, agriculture, effluent

Nominal Meter Size

6 mm ~ 2800 mm (0.2 inch ~ 110 inch)

Working Pressure

0.6, 1.0, 1.6, 2.5, 4.0, 6.4, 10, 16, 25 MPa

Accuracy

±0.25%, ±0.5% (on request)

Minimum Conductivity

＞5 μs/cm

Fluid Temperature

Rubber liner: 0~70°C

FEP liner: -20~180°C

PTFE liner: -40~180°C

Ambient Temperature

-30°C ~ 60°C (-22°F ~ 140°F)

Relative Humidity

≤90% r.h

Liner Materials

Rubber, PTFE, FEP, PFA

- PFA/PTFE: High chemical resistance, high temperature capability

- Rubber: Abrasion resistance, wide applications

Electrode Materials

316L Stainless Steel, Hastelloy (HB,HC), Tantalum, Titanium, Platinum, Tungsten Carbide

- 316L: Good corrosion/abrasion resistance (not for H₂SO₄/HCl)

- Hastelloy: Better corrosion resistance, high strength (suitable for slurry/oxidizing fluids)

- Tantalum: Excellent chemical resistance (not for fluosilicic/HF/NaOH)

- Titanium: Good corrosion/abrasion resistance (suitable for seawater, not for HF/H₂SO₄)

Output Signals

1. Current: 4~20mA (load resistance ≤500Ω)

2. Frequency: 0~10KHz

3. Pulse: 0.001~1000 Ltr/Pulse

4. Communication: RS-485, HART

5. Alarm: High/low alarm output (load current ≤30mA for ALMH)

Supply Power

AC: 85~265VAC (power ＜10W)

DC: 18~36VDC (power ＜7.5W)

Flow Rate Range

Refer to meter size (e.g., DN10: 0.014~3.39 m³/h; DN1000:141~33912 m³/h)

Flow Unit Options

L/s, L/m, L/h, m³/s, m³/m, m³/h, USG/s, USG/m, USG/h, kg/s, kg/m, kg/h

Communication Protocol

RS-485: MODBUS-RTU (default), MODBUS-ASCII

Baud rate: 1200/2400/4800/9600 (default)/19200/38400

Data bit: 7/8 (8 default; 7 unavailable for RTU)

Check mode: None (default)/Odd/Even

Device ID: 1~247 (1 default)

Calibration Functions

4mA calibration, 20mA calibration, zero calibration (requires full pipe & static fluid)

Installation Requirements

1. Pipe must be fully filled with liquid at all times

2. Inlet straight pipe: ≥3×DN; Outlet straight pipe: ≥2×DN (≥5×DN/10×DN for special fittings)

3. Avoid pulsating flow, electrical interference (motors/transformers/VFDs), air bubbles & precipitates

4. Terminal box mounted above piping (prevent water ingress)

5. Proper grounding (per national/local electrical codes; grounding rings/lining protectors for lined/non-conductive pipes)