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Mechanical Heat Meters SJM20 - MKM20

Mechanical heat meters SJM20
Key Features
  • Measurement accuracy rate of MKM20 is over metrological scaling standards.
  • Produced according to the requirements of EN 1434 standards
  • Low energy usage provides long-term battery life up to 10 years
  • Measurement system of MKM20 is not affected in magnetic fields so that provides safe scaling results.
  • Excellent accuracy and linear measurement with platinum sensors
  • MKM20 has M-BUS communication protocol.
  • 350º rotatable screen makes MKM20 easy to read.
  • 1" External gear connection.
  • 3/4" fitting set of meter is not covered by delivery.

Product Features
  • The product can measure at low flow status
  • Heat Sensor Pair for Linear Measurement
  • Minimum measurement ∆t starts 0,1 ºC
  • Temperature measurement between 5 ºC and 90 ºC
  • Maximum applicable pressure (MAP) is 16bar
  • It has a non-magnetic technology.
Model Selection in Mechanical Heat Meter Purchase
  • When purchasing a mechanical heat meter, the minimum flow rate and the nominal flow rate in the area where the heat meter will be used should be considered.
  • The model with the most suitable DN (heat meter inner diameter) diameter for the minimum and nominal flow rate should be selected.
Flow Measurement Range

The table below shows the model table associated with DN (heat meter inner diameter) - flow rate measuring range.

ModelDNNominal Flow (qp)
Minimum Flow (qi)
MKM15/ SJM15150,60 / 1,05 0,012 / 0,03
MKM20/ SJM20202,500,05
MKM25/ SJM25253,500,07
  • SJM models measure with Single Jet and MKM models with Multi Jet principle.