Insertion Electromagnetic Flow Meter

An insertion electromagnetic flow meter measures the volumetric flow of conductive liquid through a single-point probe inserted into the pipe wall. The probe carries the magnetic-field coils and a pair of electrodes at its tip. As fluid passes the field, an electromotive force is induced across the electrodes proportional to the local fluid velocity at the probe location. The Nikuradse velocity-profile correction then converts the local reading to pipe-average velocity, with the probe pre-calibrated for the ordered DN. Accuracy is ±1.0 % of rate across the calibrated 0.5 to 10 m/s range.

Insertion EMF is the cost-effective choice on three patterns. The first is large-diameter retrofit above DN800 where inline shipping and civil works dominate the project cost. The second is live-pipe metering addition through a ball-valve insert without process shutdown. The third is host pipes the inline meter cannot replace directly, including cast iron, cement-lined, HDPE, and PE distribution mains. The inline LEA stays the better choice below DN300 and where ±0.5 % of rate or better accuracy is required for custody-grade billing.

Yes; this is the core application of the LEA-INS series. The hot-tap procedure uses a welded nipple and ball valve installed on the host pipe under prep, then the sealed probe inserts through the open ball valve under live pressure and locks at the calibrated insertion depth. The probe seal contains process pressure during and after insertion, so the upstream / downstream service does not stop. Tested on water, wastewater, and process-water applications up to 1.6 MPa standard and 15 MPa on factory-custom builds.

The LEA-INS handles steel, ductile iron, cast iron, cement-lined steel, GRP, HDPE, and PE host pipes. Non-conductive sections (HDPE / PE / cement / GRP) require a metal grounding ring at the insertion fitting to restore the EMF ground reference. The probe direction marker must align with flow on every install. Pipe material does not affect accuracy directly; the calibrated single-point velocity correction is host-pipe-agnostic, provided the upstream 5D and downstream 3D straight-pipe rule is respected.

The LEA-INS shares the conductivity floor of all electromagnetic meters: the medium must measure above 5 µS/cm. Tap water, well water, river water, sea water, sewage, slurry, weak acid, weak alkali, and salt-bearing process water all stay well above the threshold. Below threshold and not measurable with EMF: deionized water (DI), demineralized boiler-feedwater after polishing, condensate from clean steam, hydrocarbons, fuel oils, and gases. For DI water choose vortex liquid build or Coriolis; for hydrocarbons choose turbine or Coriolis; for gas or steam choose vortex, ultrasonic, or thermal-mass meter families.

The LEA-INS outputs 4-20 mA analogue for loop integration, pulse output for totalizer counting, alarm contact for high / low limits, and RS-485 Modbus RTU for serial polling. HART, RS-232, M-BUS, and 4G IoT outputs are factory options. The integral display reads instantaneous flow (4 digits), cumulative volume (8 digits), and flow rate (4 digits). The split build relocates the converter up to 30 m from the probe for buried or chamber installations where on-site display access is constrained, with submersible IP68 rating on the probe head.

Standard lead time is 5 to 7 business days from order confirmation, factory direct. EMC compliance to the EU Electromagnetic Compatibility Directive 2014/30/EU (Annex II) ships standard. IP65 one-piece and IP65+IP68 split submersible ratings are selectable at order. CNEX Ex d IIC T6 Gb hazardous-area certification is available for petrochemical water and biogas-adjacent installations. Each meter ships with an ISO 9001 calibration certificate listing the serial number, calibrated DN, and tested velocity range.

Yes; STEP and DWG dimensional drawings ship with the order confirmation. The drawing package includes meter outline, mounting nipple, ball-valve specification, and installation clearances. For pre-quote design review, the engineering team can send a preliminary drawing within one business day. Coverage is sufficient for EPC bid documentation, skid-integration drawings, and P&ID inclusion. CAD format conversion to IGES, STL, or PDF is available on request.