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Flow meter HDO 120 SS/SS Ex

Suitable for measuring easily flammable liquids. Liquid examples: For combustible...more
approved according to ATEX Directive 2014/34/EU, Category 2

Suitable for measuring easily flammable liquids.

Liquid examples:
For combustible mineral oils, easy flammable hydrocarbons and other chemicals in potentially explosive surroundings.


  • For slower flow rates, high temperatures and pressures
  • Measurement according to the oval gear principle
  • For thin-bodied up to highly viscous liquids
  • Low friction resistance
  • High accuracy
  • Touch screen display with self-explanatory, multilingual user interface
  • Range of measurement from 0.26 GPM - 8 GPM (1 l/min - 30 l/min)
  • In stainless steel (SS)


  • Simple, modular construction
  • Easy handling
  • Precise measuring results at high repeatability
  • No recalibration required for large ranges
  • Low pressure losses in the plant
  • Comprehensive monitoring and safety functions
  • Relay module for preselection is retrofittable at any time
Explosion Protection: explosion-proof
Flow volumes: Flow volumes up to 8 GPM
  Flow Meter type HDO  120 Niro/Niro Ex Range of measurement:...
  Flow Meter type HDO 120 Niro/Niro Ex
Range of measurement:
below 5 mPas
above 5 mPas
2 l/min - 25 l/min
1 l/min - 30 l/min
Temperature max. 60 °C
Viscosity max. 1,000 mPas
Operating pressure max. 16 bar
Accuracy of measurement:
below 5 mPas
above 5 mPas
+- 2% of measured quantity
+- 0.5% of measured quantity
Reproducibility ± 0.03%
Nominal diameters DN 12
G 1/2 IG
LCD display Touch-Screen 63x63 mm, 128x128 pixels, display sub-total and total volume can be reset
Menue language DE, GB, ES, FR, IT, NL, PT, RU
Stainless steel (1.4404)
Stainless steel (1.4404)
Stainless steel (1.4404)
FPM (alt. FFPM, EPDM)*
Operating unit
Basic flow meter
II 2G Ex ib IIB T4 Gb**
II 2G Ex h IIB T4 Gb
Protection type IP 55
Weight 4.5 kg
* Seal FFPM resp. EPDM on request
** Type of protection II 2G Ex ib IIC T4 Gb on request.