Flow Meters

WELK Meters manufactures industrial flow meters for liquids, steam and gases across pipe sizes DN4 to DN3000. The WKLD electromagnetic flow meter handles conductive liquids — water, wastewater, slurries and chemicals — with PTFE or rubber liners, accuracy to ±0.5% and 4–20 mA/RS-485 outputs in integrated or split versions. The WK-300 ultrasonic flow meter family covers inline, clamp-on and open-channel measurement, letting operators retrofit flow measurement without cutting pipe. Vortex flow meters measure steam and gases in heating and compressed-air systems, while turbine flow meters provide high-accuracy measurement of clean, low-viscosity liquids for batching and fuel systems. All meters are wet-calibrated on our own flow rigs before shipment and ship with calibration records. Typical projects include water utility metering, district heating, irrigation, chemical dosing and energy management. As a factory-direct supplier in Baoding, China, we welcome small MOQ, OEM nameplates and engineering questions — answered within 24 hours.

Showing all 4 results

  • WK-300 Ultrasonic Flow Meter: Inline, Clamp-On, Open-Channel — product photo

    WK-300 Ultrasonic Flow Meter: Inline, Clamp-On, Open-Channel

    • Transit-time ultrasonic flowmeter family: inline (pipe-section), clamp-on and open-channel versions
    • Accuracy better than 1%, repeatability better than 0.2%; 500ms measuring period (128 samples)
    • Inline sizes: flanged DN15-1000 (rated 2.5/1.6/1.0/0.6 MPa by size), union (sanitary) DN25-100
    • Outputs: isolated RS485, OCT pulse, relay, 4-20mA; protocols MODBUS, M-BUS, FUJ extended
    • Inputs: 3× 4-20mA (pressure/level/temperature) + 2× 3-wire PT100; data logging 512 days / 128 months / 10 years
    • Supply isolated DC8~36V or AC85~264V; IP65/IP68
  • WKGB Vortex Flow Meter DN20–DN300 — product photo

    WKGB Vortex Flow Meter DN20–DN300

    • Karman vortex-shedding flowmeter for liquid, gas and steam, DN20–DN300
    • Accuracy: liquid ±0.5 of reading; gas/steam ±1.0, ±1.5; turndown 1:10 / 1:15
    • Medium temperature -40~+250℃ / -40~+350℃; pressure ratings PN1.6MPa, PN2.5MPa, PN4.0MPa
    • Outputs: pulse 0.1~3000Hz or 4~20mADC 2-wire; supply +12VDC(+24VDC), +24VDC or 3.6V lithium battery (≥5-year, field display type)
    • Temperature & pressure (T&P) compensated versions for steam/gas mass flow
    • ExdIIBT6, IP65, vibration tolerance 1.0g
  • WKGY Liquid Turbine Flow Meter DN4–DN200 — product photo

    WKGY Liquid Turbine Flow Meter DN4–DN200

    • Liquid turbine flowmeter, DN4~DN200; flow from 0.04-0.25m³/h (DN4) up to 80-800m³/h (DN200)
    • Accuracy ±0.5%R / ±1.0%R; short-term repeatability 0.05%-0.2%
    • Variants: WKGY-N pulse output, WKGY-A 4-20mA 2-wire, WKGY-B battery-powered local display; RS485 / HART options
    • 304 / 316(L) stainless body; medium temperature -20~+120℃
    • Threaded ≤DN40 up to 6.3Mpa; flanged DN50-DN200 up to 2.5Mpa
    • Explosion-proof option ExdIIBT6; signal transmission up to 1000m
  • WKLD Electromagnetic Flow Meter DN10–DN3000 — product photo

    WKLD Electromagnetic Flow Meter DN10–DN3000

    • Smart magnetic flowmeter for conductive liquids (conductivity ≥5uS/cm), DN10–DN3000
    • Accuracy ±0.3% of reading (DN15–DN600, v≥1m/s); ±0.5% (DN700–DN3000); turndown 1500:1
    • Max velocity 15m/s; pressure ratings up to 4.0MPa standard, 6.3/10MPa special order
    • Liner options PTFE (F4), FEP (F46), PFA, neoprene, polyurethane; 7 electrode materials incl. Hastelloy B/C, Ti, Ta, Pt-Ir
    • Outputs 4-20mA/pulse, RS232C, RS485, HART; supply 220VAC 50Hz or 24VDC
    • Integral, remote, submersible-remote and explosion-proof versions

Flow Meter Selection Guide

No single flow technology fits every duty. WELK Meters manufactures four complementary families: WKLD electromagnetic flow meters (DN10–DN3000, conductive liquids), WKGY turbine meters (DN4–DN200, clean low-viscosity liquids), WKGB vortex meters (DN20–DN300, steam and gases) and WK-300 ultrasonic meters (inline, clamp-on and open-channel).

Matching technology to application

  • Electromagnetic — water, wastewater, slurries and chemicals with conductivity ≥5 µS/cm; accuracy ±0.3% of reading; PTFE/rubber liners and 316L/Hastelloy/Ti electrodes.
  • Turbine — high-accuracy (±0.5%R) custody-style measurement of clean liquids such as diesel and water.
  • Vortex — saturated/superheated steam, compressed air and gases to 350 °C; temperature & pressure compensated versions output mass flow.
  • Ultrasonic — clamp-on retrofits without cutting pipe; inline spool pieces DN15–DN1000; open-channel flumes for discharge monitoring.

Tell us the medium, pipe size, flow range and temperature — our engineers size the right meter and reply within 24 hours.

Get a Quote