For measuring of consumption of greater amounts of cold water with a temperature up to 30 °C or 50 °C, or hot water with a temperature up to 130 °C, on the maximum working pressure up to 16 bar (PN16). Suitable for installation in the horizontal hoses (pipelines) with the counter directed upwards (H), in vertical or horizontal hoses with the counter directed sidewards (V) or in diagonal hoses (H/V). MWN water meters in standard version are equipped with six-barrel counter (IP65, IP68 – optional) and painted cast-iron housing. Water meters are adapted to operation in the systems of remote data transfer (AMR).





Metrological class (MID)


  • Cold water R100÷200 - H, V
  • Warm water R25÷40 - H, V


  • Cold water R100 - H, V
  • Warm water R40 - H, V


Product features

  • Preequipped for installation of: radio module for communication in the Wireless M-Bus and impulse module (not applicable to water meters for hot water and versions with NK, NO, NKO and NKOP transmitters)
  • Wide measuring range
  • Low starting rate
  • Removable measuring panel
  • Double-sided rotor bearing
  • Easy reading of the water meter counter
  • Hermetic counter - IP68 on request ****)„„
  • Counter mechanism with blockade against multiple rotating, at rotation angle more than 360°
  • Readings reliability
  • In special option housing with connection for pressure measurement DN50-300 (cold and hot water)
  • Optional version for demineralised water DN40-125 (cold and hot water)
  • On request possibility of another drilling



Basic technical data

WATER METERS for cold water
MWN 40-XX* Nubis 25 40 200 flange***
MWN 50-XX* Nubis 40 50 200 flange***
MWN 50-G-XX* Nubis 40 50 200 G2½
MWN 65-XX* Nubis 63 65 200 flange***
MWN 80-XX* Nubis 100 80 225 / 200 ** flange***
MWN 100-XX* Nubis 160 100 250 flange***
MWN 125-XX* Nubis 250 125 250 flange***
MWN 150-XX* Nubis 400 150 300 flange***
MWN 200-XX* Nubis 630 200 350 flange***
MWN 250-XX* Nubis 1000 250 450 flange***
MWN 300-XX* Nubis 1600 300 500 flange***
MWN 400-XX* Nubis 1000 (Qn) 400 600 flange***
MWN 500-XX* Nubis 1500 (Qn) 500 800 flange***
WATER METERS for hot water
MWN130 40-XX* Nubis 25 40 200 flange***
MWN130 50-XX* Nubis 25 50 200 flange***
MWN130 50-G-XX* Nubis 25 50 200 G2½
MWN130 65-XX* Nubis 40 65 200 flange***
MWN130 80-XX* Nubis 63 80 200** / 225 flange***
MWN130 100-XX* Nubis 100 100 250 flange***
MWN130 125-XX* Nubis 160 125 250 flange***
MWN130 150-XX* Nubis 250 150 300 flange***
MWN130 200-XX* Nubis 400 200 350 flange***
MWN130 250-XX* Nubis 630 250 450 flange***
MWN130 300-XX* Nubis 1000 300 500 flange***

*) DN-XX / DN-G-XX – Water meters designs – where -XX stands for:
    -NK – water meter with pulse transmitter (Read relay) – remote transmission of volume counting
    -NO – opto-electronic transmitter (not applicable to water meters for hot water) – remote transmission of volume counting
    -NKO – water meter equipped with NK and NO transmitter
    -NKOP – water meter adapted for installation of NK and NO transmitter
    On request – special design for demineralised water, only for diameters DN40-125
    On request – water meter housing with pressure measurement outlet
**) On request housing length according to ISO 4064
***) Flange drilling:
       - Standard according to PN-EN 1092-2 (PN10), DIN 2532, DIN2501 (NP10), BS4504 (NP10)
       - Special according to PN-EN 1092-2 (PN16 and 25) diameters range DN40 do DN150 (on request)
       - Additional according to JIS B2220-1984 (DN40-300) and ANSI B16.5 class 150 (DN40-300) (on request)
****) O n request IP68 – cold water only, pre equipped for radio transmitters - Wireless M-Bus standard
          or NK transmitter with pulse range 10, 100, 1000 dm3/imp. (not applicable to NO and NKO)

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