Electromagnetic Flow Meter YYEM Series

YOYI YYEM series product view

YOYI YYEM Series · high-accuracy metering for conductive liquids

Maintenance-Free Measurement for Conductive Liquids

The YOYI YYEM series electromagnetic flow meter measures the flow of any electrically conductive liquid with no moving parts and no obstruction to the flow profile. Lined with PTFE, rubber or PFA, it handles water, wastewater, slurries and aggressive chemicals with equal confidence.

Wetted materials
PTFE / PFA / hard rubber
Outputs
4-20 mA, pulse, Modbus, HART
Power supply
220 VAC / 24 VDC / battery
Warranty
24 months

✓Full-bore, obstruction-free design zero pressure loss and no wear parts for a long, maintenance-free service life.
✓Wide conductivity range measures liquids with conductivity as low as 5 μS/cm, including demineralized water.
✓Versatile liners and electrodes PTFE / hard rubber / PFA liners with 316L, Hastelloy, tantalum or platinum-iridium electrodes.
✓Rich outputs 4-20 mA, pulse, Modbus RTU, HART and optional GPRS/NB-IoT remote transmission.

Request a Quote View Models

Selection Guide

YYEM Series Model Range

Standard configurations are listed below. Custom liners, electrodes, connections and communication options are available on request.

Model	DN	Flow range	Connection	Pressure
YYEM-15	DN15	0.11 – 4.2 m³/h	Thread / flange	PN16
YYEM-25	DN25	0.3 – 12 m³/h	Flange	PN16
YYEM-50	DN50	1.2 – 45 m³/h	Flange	PN16
YYEM-100	DN100	4.5 – 180 m³/h	Flange	PN16
YYEM-200	DN200	18 – 700 m³/h	Flange	PN10 / PN16
YYEM-300	DN300	40 – 1600 m³/h	Flange	PN10 / PN16

Flow ranges are based on 0.5 – 10 m/s velocity. Larger sizes to DN2200, sanitary connections and battery-powered versions are available on request.

Electromagnetic Flow Meter working principle diagram

How It Works

The YYEM meter applies Faraday's law of electromagnetic induction: a conductive fluid moving through a magnetic field generates a voltage proportional to its velocity. Two electrodes mounted flush in the liner pick up this small EMF, which the converter amplifies into a flow reading.

Because nothing protrudes into the stream, the meter is immune to clogging and creates no pressure drop. Reverse flow is measured with the same accuracy, and the empty-pipe detector suppresses false totals when the line drains.

Technical Specifications

Diameter	DN10 – DN2200
Accuracy	±0.5% of reading (±0.2% optional)
Medium conductivity	≥ 5 μS/cm
Flow velocity range	0.1 – 12 m/s
Liner material	PTFE / PFA / hard rubber / polyurethane
Electrode material	316L / Hastelloy C / tantalum / Pt-Ir
Output signal	4-20 mA / pulse / Modbus / HART
Power supply	220 VAC / 24 VDC / battery
Protection class	IP65 / IP68 (remote type)
Ambient temperature	-25 °C … +60 °C

Typical Applications

Water treatmentWastewaterChemical dosingMining slurryPaper pulpFood & beverageDistrict heatingIrrigation

Water and wastewater treatment plants, irrigation networks, chemical dosing and transfer, mining slurries, paper pulp, sanitary food lines and district heating/cooling sub-metering.

Get a YYEM quotation

Tell us fluid, line size, flow range and required output — we reply with a best-fit configuration within one business day.

Request a Quote Talk to an Engineer

✉ annie@yoyimeter.com

☎ +86 18027268785

Downloads

PDF

Technical DatasheetYYEM series · specifications & dimensions

PDF

Installation & Operation ManualWiring, commissioning and maintenance

PDF

Selection & Sizing GuideModel code builder and sizing worksheet

Documents are sent by email on request — the latest revision is always provided.

Why Choose the YYEM Series

✓Bi-directional measurement with standard totalizer for both forward and reverse flow.
✓Low flow cutoff suppression ensures honest totals even in dribble-flow dosing duties.
✓Empty-pipe detection prevents false totals when the line is drained.

Frequently Asked Questions

Can it measure deionized water?

Standard electrodes need about 5 μS/cm. For ultra-pure water we supply capacitively coupled electrodes; below that, an ultrasonic or Coriolis meter is the better fit.

Do I need straight pipe runs?

Five diameters upstream and three downstream are recommended. With a flow conditioner the upstream requirement can be reduced to three diameters.

Can the transmitter be mounted remotely?

Yes. Remote versions separate the converter from the sensor by up to 100 m, which suits flooded pits, hot lines and hazardous areas.