In addition to our extensive and highly specialized product range, we naturally also offer our customers comprehensive know-how in all relevant disciplines relating to modern measurement technology. With competent advice, such as in the safeguarding and conformity assessment of measuring systems in accordance with the Measuring Instruments Directive 2014/32/EU, we create individual solutions for our customers, put devices and systems into operation and offer comprehensive after-sales service.
OVAL WHEEL METER PRODUCTS
Volume measurement of liquids and liquid gases in loading applications of the chemical and petrochemical industry, petroleum industry and of food and beverages:
- In the oil industry for the measurement of crude oil or refined products or in the gas industry for the measurement of liquid gas
- in dosing and loading technology for the measurement of defined quantities of various fuels and additives
- in the petrochemical industry for measuring products such as ethylene or propylene liquid
- in the chemical industry for measuring various acids or alkalis
- in mechanical and apparatus engineering for measuring lubricants or process fluids
- in shipbuilding for measuring fuel consumption
CHARACTERISTICS
high measurement accuracy
Single Case Oval wheel meter:
accuracy: Flowal® Plus up to ±0.25%
accuracy: OI up to ±0.1%
Double Case Oval wheel meter:
accuracy: OP up to ±0.15%
accuracy: OaP up to ±0.05%
SPECIAL FEATURES
- Mechanical or electronic counters available
- No inlet and outlet sections required
- Wide viscosity range
- Simple installation and commissioning
- Maintenance-free
- National and international approvals
- Custody transfer certificates / OIML / MID 2014/32/EU
(old version: 2004/22/EG) - Evaluation Certificate (Welmec 8.8)
- SIL 2 (OaP series)
- Llyods Register (OI, OaP)
- Approved for use in legal metrology
- ATEX
- PED
- NACE
TECHNICAL DATA IN GENERAL
Nominal size | 6 to 400 mm (1“ bis 16“) |
Process connection | Females threading Flange according to DIN or ANSI |
Material | Pressure relevant: cast steel, stainless steel, PVDF Other wetted parts: PEEK, aluminum; brass, ceramics, stainless steel, others |
Flow Range | 0,03 l/min to 24.000 l/min (0.008 gal/min to 6,340 gal/min) |
Accuracy | ±0,05% to ±0,5% |
Repeatability | ±0,02% |
Viscosity | 0,1 to 100.000 mPa·s |
Process temperature | -40°C to 290°C (-40°F to 554°F) |
Process pressure | max. 100 bar bar (1,450 psi) |
Ex-protection | Flame proof or intrinsically safe |
OVAL WHEEL METER SERIES OAP
Application:
Oval Wheel Meters Type OaP / OP are used for measuring liquid raw, intermediate and finished products such as liquefied gases, gasolines, heating oils, lubricating oils, transmission oils, solvents, bitumen, alkaline solutions, acids and other chemical liquids.

TECHNICAL DATA
Nominal size | 25 to 400 mm (1/4“ bis 16“) |
Process connection | Flanges according to DIN or ANSI |
Material | Pressure relevant: cast steel Other wetted parts: aluminum; brass, stainless steel, others |
Flow Range | 5 to 24.000 l/min (1.32 to 6,340 gal/min) |
Accuracy | ±0,05% to ±0,5% |
Repeatability | ±0,02% |
Viscosity | 0,1 to 100.000 mPa·s |
Process temperature | -40°C to 290°C (-40°F to 554°F) |
Process pressure | max. 100 bar (1,450 psi) |
Ex-protection | Flame proof or intrinsically safe |
SPECIAL FEATURES
- double case meter Design
- no straight inlet and outlet pipe sections required
- measuring principle independent of the viscosity
- compact design
- easy start-up
- maintenance-free
- the only SIL 2 oval wheel meter world wide
- broad range of custody transfer approvals
CHARACTERISTICS
- oval wheel meters for low- , mid-, and high viscosity liquids
- high measurement accuracy
- low pressure loss
- high life time
INDUSTRIES
- Oil and Gas
- Chemistry and pharmaceutical
- Mechanical and plant engineering
- Energy and power plants
- Shipbuilding
OVAL WHEEL METER SERIES OP
Application:
Oval wheel meters type OP are used for measuring liquids such as gasolines, heating oils, lubricating oils, diesel oil, bio ethanol and some chemical liquids.

TECHNICAL DATA
Nominal size | 15 to 150 mm (1/2“ bis 6“) |
Process connection | Flange according to DIN or ANSI |
Material | Pressure relevant: cast steel, stainless steel, Wetted parts: aluminum or stainless steel |
Flow Range | 0,08 to 5.000 l/min (1.32 to 1,320 gal/min) |
Accuracy | ±0,2% to ±0,5% |
Repeatability | ±0,02% option special calibration: ±0.15% |
Viscosity | 0,3 to 120 mPa·s |
Process temperature | -10°C to 110°C (14°F to 230°F) |
Process pressure | max. 40 bar (580 psi) |
Ex-protection | Flame proof or intrinsically |
SPECIAL FEATURES
- Double case meter design
- no straight inlet and outlet pipe sections required
- measuring principle independent of the viscosity
- easy start-up
- maintenance-free
CHARACTERISTICS
- oval wheel meter for mid to high viscosity liquids
- low pressure loss
- high life time
INDUSTRIES
- Oil and Gas
- Chemistry and pharmaceutical
- Mechanical and plant engineering
- Energy and power plants
- Shipbuilding
OVAL WHEEL METER SERIES OI
Application:
Oval wheel meters type OI are used for the measurement of liquid products such as liquefied gases, acids, alkaline solutions, fats, alcohols, solvents, dispersions, polymers, poly-condensates, paints, colors and adhesives etc.

TECHNICAL DATA
Nominal size | 25 to 100 mm (1“ bis 4“) |
Process connection | Flanges according to DIN or ANSI |
Material | pressure relevant: cast steel, grey cast iron, stainless steel wetted parts: aluminum; brass, cast iron |
Flow Range | 8 to 1,000 l/min (2 264 gal/min) |
Accuracy | ±0,01% to ±0,3% |
Repeatability | ±0,02% |
Viscosity | 0,3 to 3.000 mPa·s (standard) 1,5 to 60.000 mPa·s (ball bearing) |
Process temperature | -60°C up to 180°C (-76°F to 356°) High temperature design: special clearances / extension 300 mm Low temperature design: special clearences / extension 400 mm + 2 magn. coupling / pmax = 0.5 x PN |
Process pressure | max. 40 bar (580 psi) |
Ex-protection | Flame proof or intrinsically |
SPECIAL FEATURES
- single case meter Design
- no straight inlet and outlet pipe sections required
- measuring principle independent of the viscosity
- compact design
- easy start-up
- maintenance-free
CHARACTERISTICS
- oval wheel meters for mid to high viscosity liquids
- high measurement accuracy
- low pressure loss
- high life time
INDUSTRIES
- Oil and Gas
- Chemistry and pharmaceutical
- Mechanical and plant engineering
- Food and beverage
- Energy and power plants
- Shipbuilding
OVAL WHEEL METER SERIES FLOWAL® PLUS
Application:
Versatile flowmeter for measuring the volume of liquids in mechanical engineering, factory automation and process instrumentation, such as suited for industrial fluids, chemical fluids, mineral oils and fuels. The modular design combines reliable mechanical sensors with modern electronics. The plastic version is suitable for measuring the volume of corrosive liquids, acids, alkalis, solvents, dyes…

CHARACTERISTICS
- oval wheel meters for low to mid viscosity liquids
- battery powered model available
- low pressure loss
SPECIAL FEATURES
- single case meter design
- no straight inlet and outlet pipe sections required
- measuring principle independent of the viscosity
- easy start-up
- maintenance-free
- plastic version: no wetted metal parts and low weight
- built-in temperature sensor
- battery-supplied compact devices
- detection of flow direction
TECHNICAL DATA
Nominal size | G1/4“, G1/2“, G3/4“, G1“, G2“ Flanges DN15, DN25, DN50 Flanges ½“, 1“, 2“ |
Process connection | Inside threads according to ISO 288 Flanges according to DIN or ANSI |
Material | pressure relevant: stainless steel, aluminum, PVDF, PP other wetted parts: PEEK; stainless steel |
Flow Range | 0,03 l/min to 660 l/min |
Accuracy | ±0,25% to ±0,5% |
Repeatability | ±0,02% |
Viscosity | 0,3 to 3.000 mPa·s |
Process temperature | -40°C up to 130°C (-40°F up to 266°F) |
Process pressure | up to 68 bar (986 psi) |
Ex-protection | intrinsically safe (ATEX or IEC-Ex) |

INDUSTRIES
- Oil and Gas
- Chemistry and pharmaceutical
- Mechanical and plant engineering
- Food and beverage
- Shipbuilding
OVAL WHEEL METER SERIES OD
Application:
The focus is on the measurement of non-conductive liquids. This meter is designed for the measurement of e.g. oil or demineralized water. Due to the measuring principle, an inlet or outlet section is not required.

SPECIAL FEATURES
- Fillings from 10 ml possible
- very short dosing times > 250ms
- high resolution (e.g. DN10: 2000 pulses/l)
- large selection of filling quantities with different nominal sizes
- can be combined with the batch controller
CHARACTERISTICS
- direct measurement of volume
- measurement of non-conductive and conductive liquids
- high accuracy / repeatability also for small quantities
- high long-term stability
TECHNICAL DATA
Nominal size | DN10,DN15,DN25 |
Process connection | TriClamp according to DIN 32676 |
Material | Housing: stainless steel Oval wheels: stainless steel, PEEK Seals: EPDM, alternatively Viton |
Flow Range | 0.2 to 5 l/min – 2,000 Pulses/ (0.05 to 1.32 gal/min)l 1 to 30 l/min – 1,000 Pulses/l (0.26 to 7.93 gal/min) 2 to 50 l/min – 400 Pulses/l (0.53 to 13.21 gal/min) 4 to 100 l/min – 200 Pulses/l (1.06 to 24.42 gal/min) |
Accuracy | ±0,25% to ±0,5% |
Repeatability | ±0,1% |
Viscosity | 0,3 to 1.500 mPa·s |
Process temperature | Liquid temperature: -10°C to +130°C (-14°F to 266°F) ambient temperature: -20°C to +70°C (-4°F to 158°F) |
Process pressure | max. 16 bar |
Ex-protection | not available |
INDUSTRIES
- Chemistry and pharmaceutical
- Food and beverage
Coriolis Mass Flow Meter Type FMO
Mass flow meters dedicated to the measurement of liquids and gases.
Application:
- Custody transfer for mineral oils, bitumen and other viscous media
- Process measurement of mechanical and plant engineering

SPECIAL FEATURES
- suitable for high pressure applications
- measurement of corrosive fluids
- various electronic converters available
CHARACTERISTICS
- high accuracy
- easy start-up
- independence on the flow profile
- low sensitivity to air bubbles
TECHNICAL DATA
Nominal size | DN15 up to DN300 (1/2“ bis 12“) |
Process connection | Female threading, flanges DIN or ANSI |
Material | Stainless steel, Hastelloy, Tantalum, Duplex |
Flow Range | 0,004 up to 30.000 kg/min (0.009 up to 66,139 Ib/min) |
Accuracy | ±0,15% |
Repeatability | ±0,05% |
Process temperature | -200°C up to +400°C (-328°F up to +752°F) |
Process pressure | 1,379 bar (20,000 psi) |
Ex-protection | Flame proof or intrinsically safe |
INDUSTRIES
- Oil and Gas
- Chemistry and pharmaceutical
- Mechanical and plant engineering
- Food and beverage
- Energy and power plants
Turbine Meter
The turbine meter is used for flow and volume measurement of liquid.

Application:
Measuring liquids and liquefied gases in the chemical and petrochemical industry, in the mineral oil industry and loading systems, especially for high operating pressures and low viscosities.
The following liquid media can be measured with the turbine meter:
- crude oil
- mineral oil
- acids
- alkaline solutions
- solvents
- water
- liquefied gases
- refined oil products (gasoline, kerosene, jet A1, JP8, diesel)
- vinyl chloride
SPECIAL FEATURES
- high flow capacity
- approved for fiscal metering

TECHNICAL DATA
Nominal size | DN15 to DN300 (1/2“ bis 12“) |
Process connection | Flanges according to DIN or ANSI |
Material | Carbon steel, stainless steel (option: Hastelloy, Duplex) |
Flow Range | 0.15 to 2,400 m³/h (40 to 643,013 gal/h) |
Accuracy | ±0,15% to ±0,5% |
Repeatability | ±0,02% |
Viscosity | 0,2 to 50 mPa·s |
Process temperature | -60°C to +250°C (-76°F to +482°F) |
Process pressure | up to 320 bar (4,641 psi) |
Ex-protection | Flame proof or intrinsically safe |
CHARACTERISTICS
- high measurement accuracy
- high repeatability
- proven and reliable measuring instruments
VORTEX METER VTX 3
Application:
- measurement of saturated steam and superheated steam
- heat quantity measurement of steam and hot water
- consumption measurement of industrial gases
- safety-relevant measurements in SIL applications
- consumption measurement in compressed air networks

SPECIAL FEATURES
- latest modern technology for signal filtering -AVFD (Advanced Vortex Frequency Detection)
- integrated pressure and temperature compensation
- temperature compensation for saturated steam included as standard
- integrated nominal width reduction
- integrated gross and net heat quantity calculation for steam and hot water
- comprehensive communication options
INDUSTRIES
- chemistry
- oil & gas
- power plants
- food & beverages
- pharmaceutical
- paper & pulp
- automobile industry
- iron, steel and metal
VORTEX METER VTX 2
The VTX vortex meter is used for flow and volumetric measurements of conductive and non-conductive fluids, gases and vapours in all industrial branches.
Application:
Applications include volumetric measurements for balancing (compressed air systems, heat carriers, vapours, chemical products, for example), process control and high throughput applications, thermal oil.
TECHNICAL DATA
Nominal size | DN15 to DN300 (1/2“ to 12“) (larger connections on request) |
Process connection | Sandwich, Flanges according to DIN or ANSI |
Material | Stainless steel |
Flow Range | 0.4 to 20,000 m³/h (106 to 5,283 gal/h) |
Accuracy | up to ±0,6% |
Repeatability | -40°C up to +260°C / 450°C (-40°F up to +500°F / 842°F) |
Viscosity | up to PN100 |
Process temperature | current output with HART® or current pulses and scalable pulse output according to NAMUR |
Process pressure | eight digit display up front with operating keys, DTM and AMS drivers are available |
Ex-protection | Flame proof or intrinsically safe |
CHARACTERISTICS
- Extremely rugged and stable measuring instrument
- maintenance-free
SPECIAL FEATURES
- insensitive to pulsations, pressure bursts and temperature shocks
- with auto-adaptive digital signal processing
- with P- and T-correction
- 3 simultaneously and independently usable signals (current output HART®,pulses)
- with an optional shut-off valve, the sensor and the electronics can be replaced under process conditions
- optional with complete measuring section and universal flow computer for pressure and temperature compensation
INDUSTRIES
- Oil and Gas
- Chemistry and pharmaceutical
- Mechanical and plant engineering
- Food and beverage
- Energy and power plants
Compact Orifice

The compact orifice Oriflow is used for flow measurements of conductive and non-conductive fluids, gases and vapours in all industrial branches.
Our strategic business unit (SBU) METRA Energie-Messtechnik has taken over this area. Our team will be happy to answer any questions you may have.
Application:
Applications include flow measurements (volume / Mass) for balancing (compressed air systems, heat carries, process control and high throughput applications, redundant solutions for safety applications
TECHNICAL DATA
Nominal size | DN15 to DN300 (1/2“ to 12“), bigger sizes on request |
Process connection | Sandwich, Flanges according to DIN or ANSI |
Material | Stainless steel, Hastelloy, Tantalum, Titan, PVDF, Monel |
Flow Range | 0.2 to 150,000 m³/h (52.83 to 39,625808 gal/h) |
Accuracy | up to ±0,6% |
Viscosity | -40°C up to +400°C (-40°F up to +752°F) |
Process temperature | up to PN100 (up to 320 bar / 4,641 psi on request) |
Process pressure | current output / Foundation Fieldbus / Profibus A |
Ex-protection | Flame proof or intrinsically safe |

SPECIAL FEATURES
- dry calibration
- high repeatability
- easy installation without pressure lines
CHARACTERISTICS
- highest market acceptance already over 10,000 units in operation worldwide
- extremely rugged and stable measuring instrument
- suitable for extreme applications
INDUSTRIES
- Oil and Gas
- Chemistry and pharmaceutical
- Mechanical and plant engineering
- Energy and power plants
Electromagnetic Flowmeter

General purpose magnetic inductive flowmeter for applications in the water / waste water industry.
Application:
The field of application for all electromagnetic flowmeters of the SpiraMAG® series is the measurement of conductive liquids (>5µS/cm) like water, waste water in continuous flow measurement.
The series comprises the nominal diameters DN 15 to DN 1000 and is available in the pressure stages PN 10/16/40. The standard maximum temperature is 60°C.
Different connections and output signals are available.
SPECIAL FEATURES
- empty pipe detection
- third grounding electrode optional
- bidirectional measurement
- direct output 4-20 mA / HART®, pulse output
- Modbus (RTU & ASCII)
- battery powered solutions available
CHARACTERISTICS
- soft rubber liner, ideal for abrasive liquids
- user friendly converter compact or remote mounted
- communication interface HART® or RS 485
TECHNICAL DATA
Nominal size | DN 15 up to DN 1000 (on request up to DN 2.000) |
Process connection | Flanges DIN or ANSI (others on request) |
Material | Body in painted steel / optionally stainless steel Electrodes in stainless steel / Hastelloy C / Platinum Liner in soft rubber, hard rubber or PTFE / PFA |
Conductivity | >5µS/cm |
Flow range | 0.03 to 12 m/s |
Accuracy | ±0.25 % of reading ±0.1 % fulll scale (for powered devices) |
Process temperature | 0°C to +65°C (compact, rubber liner) 0°C to +65°C (remote, rubber liner) -20°C to +100°C (compact, PTFE liner) -20°C to +150°C (remote, PTFE liner) |
Process pressure | up to 40 bar (others on request) |
INDUSTRIES
- Water / Waste water industry