Flow meter HDO 250 Alu/PPS

for non-flammable liquids

Order number: US-0231-209
Price: upon request
is not suitable for hazardous areas

SKU: Flow meter HDO 250 Alu/PPS Categories: , , ,


Product information “Flow meter HDO 250 Alu/PPS”

Version: with explosion protection
Viscosity: up to 500,000 mPas
Note: The nominal diameter of the flow meter is DN 25 .


The first flowmeter with touchscreen display and backlight impresses with its simple, on-demand display and operability, multilingual interface and compact design. Due to the rotating Oval gear meter and the magnets placed on the measuring wheels, it enables the precise measurement of the volume flow and measures non-flammable liquids such as lyes, mineral oils, hydrocarbons and solvents as well as highly flammable liquids precisely, quickly and, above all, efficiently.

  • Optionally available in explosion-proof design
  • Media examples: Paints, lacquers, mineral oils, acids, alkalis, Mineral oils,  Solvents

Features & Advantages

  • Measurement according to the oval wheel principle
  • High measuring accuracy due to overrun correction
  • Low pressure losses in the system
  • Touchscreen display with self-explanatory, multilingual user interface
  • Relay module for volume preselection can be retrofitted at any time
  • Approved according to ATEX Directive 2014/34/EU, Category 2
Technical data
Housing Material: Aluminum
Seals (material): FPM (fluorinated rubber)
Measuring wheels (material): PPS (Polyphenylensulfid)
Axis (material): Edelstahl (1.4404)
Flow volumes (up to max. GPM): 45
Temperature of medium (max °F): 176
Operating pressure (max. psi): 232
Viscosity (up to max. cps)*: 500000
Messprinzip: Ovalrad
Connection: Gewinde
Connection thread inside : 1″
Hose connection – nominal diameter (DN): 25
Messgenauigkeit kalibriert**: ± 2
Wiederholgenauigkeit (%): ± 0,03
Explosion Protection: Yes
Connection: Gewinde
Protection type: IP55
Version: ohne Mengenvorwahl
Certification: ATEX Richtlinie (ATEX Richtlinie 2014/34/EU)
Type: HDO 250 Alu/PPS Ex

* The maximum flow rate is a value determined by means of a test bench and measured with water at a medium temperature of approx. 20 °C. The measurement is carried out at the pressure joint of the pump, without hose, nozzle or flow meter. The achievable flow rate in use is lower and depends on the individual application, the liquid properties and the configuration of the pump. The max. delivery head also depends on the pump design, motor and fluid. The viscosity values are determined with oil.

** Test assembly: Medium water / diesel, flow in preferred direction, settling section 0.2 m upstream and downstream of flow meter

Additional information


"without explosion protection", "With explosion protection"


"up to max. 1,000 mPas", "up to max. 500,000 mPas"