Electromagnetic flowmeter

Specific for installations with “0 diameters” near curves, fittings etc …

Dn 40 ÷ 800 mm

Acuracy: ± 0.5%

Power supply 85 ÷ 265 Vac o 12; 24 Vac/Vdc

Remote control via Smartphone

SKU 087408522c31 Categories ,


SGM LEKTRA presents a new type of electromagnetic flowmeter: RKmag. Because of its particular inner shape the mounting of the unit requires no straight pipe lengths before and after the meter. The converter is equipped with a large, bright, removable O-LED display and can mount a pen-drive USB data logger. The configurable outputs can be analogic, pulse and MODBUS RTU and alarm messages are managed by 2 configurable relays.RKmag is suitable for the use with a wide range of conductive liquids, even chemically aggressive: the electrodes material can be selected according to the chemical properties of the fluid.

Additional information

Flow rate range

Bidirectional on fluids with speeds up
to 10m / s

Range dimension / lining material

neoprene DN50 ÷ DN300

Sensor material


Housing material

epoxy painted aluminium

Electrodes material

SS316L – Hastelloy C

Measure range

<3m³/h ÷ >2400m³/h


±0,5% standard; ±0,2% optional



Fluid conductivity


Power supply

85÷265Vac, 24Vac/dc, 12Vdc.


6W, max. 8W.

Ambient Temperature Limits

Remote version operating temperature: -10 ÷ +80°C
Compact version operating temperature: -10 ÷ +80°C
Storage temperature: -40÷85°C

Communication protocol

Modbus RTU or Bluetooth App Android (opt.) or Hart (opt.)

Data Logger

Internal data logger to USB pen drive for flow measurements and analog inputs storing; the measurement storage interval can be set from 15 to 3600 seconds


4÷20mA: 0÷500Ω
Frequency output: 0,1÷10000Hz
Pulse output: 24Vdc galvanically isolated or open collector galvanically isolated 24V 20mA (opt)
Alarm output: 2 relays, 3A 230Vac N.O.

Input signals

RKMAG has 2 active analog inputs at 24Vdc for 2-wire transmitters connection (eg. Temperature or pressure) and 1 digital input for an external contact connection for the integrated batch function restart and for partial totalizer management.

Reverse Flow

Allows measure and totalization of reverse flow.

Output Testing

Relays output: Transmitter can switch relays at testing value.
Current Source: Transmitter can be commanded to supply a specified test current between 4.0 and 20.0 mA.
Frequency Source: Transmitter can be commanded to supply a specified test frequency between 1 ÷ 10000 Hz.

Low Flow Cutoff

Adjustable. Below selected value, instantaneous flow and outputs are driven to the zero flow rate signal level.

Humidity Limits

0-100% RH to 150 °F (65 °C), not condensing.


Adjustable between 1 and 99 seconds.

Compact version IP rating


Remote version IP rating

sensor IP67 / IP68 (by request)
converter IP67

Anti-condensation filter

Anti-condensation filter installed on converter

Operating Manual


Data Sheet


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