DDM Sensors provides a comprehensive selection of flow meters designed specifically for industrial applications. Our flow meters stand out for their exceptional quality and long-lasting durability. Thanks to our customized solutions, we can adapt the flow meters perfectly to your application.
Efficient measuring principles for oil flow measurement
DDM Sensors provides multiple measurement technologies for oil flow applications. These include oval gear meters, turbine meters, and ultrasonic flow meters. Each of these systems has specific advantages for certain applications.
Oval gear meter for applications with oil
Oval gear meters excel in oil flow measurement, delivering precise results regardless of viscosity changes. They are ideal for highly viscous media and have excellent pressure resistance.
The OG series from DDM Sensors features the following specifications:
- Connection: 1/4″ to 2″ BSP F or NPT F
- Measuring range: 0.01 l/min to 500 l/min (with 30 cst oil); 0.1 l/min to 500 l/min (with water)
- Repeatability: ±0.1% of the measured value
- Output: pulse NPN; voltage
- Pressure ranges: <10 bar, <50 bar, <400 bar, <700 bar (depending on model)
- Temperature range: -20 to 80°C, -40 to 100°C, -40 to 150°C (depending on model)
Special features:
- Suitable for high viscosities
- Excellent pressure resistance
- No inlet/outlet section required
- Ideal for tight installation spaces
The OG model series is suitable for a wide range of measuring media such as oils, alkalis, acids, alcohols, greases, paints and varnishes. Special versions are available for highly viscous, abrasive or corrosive media.
excl. 19% VAT plus shipping costs
Connection: 1/2″ BSP F or NPT F
Measurement range: 0,05 … 10,0l/min at 30cst oil; 0,5 … 10,0l/min with water
Repeatability: ±0,1%
Output: Impuls NPN; voltage
Pressure Ranges: <10bar, <50bar, <400bar, <700bar
Temperature range: -20 – 80°C, -40 – 100°C, -40 – 150°C
Data sheet: pdf | 1,009 KB
excl. 19% VAT plus shipping costs
DDM Oval Gear Meter – Long service and small space requirement
OG series oval gear meters are positive displacement meters designed to measure liquids such as water, coolant, oil, and fuel with flow rates from 0.01 to 500 liters. The liquid flow drives two oval-shaped gears, whose rotation is detected by a Hall sensor to determine the displaced volume. Their special tooth geometry minimizes pressure loss and enables accurate measurement even at low flow rates, independent of viscosity or temperature changes. The compact design allows easy installation without the need for flow straighteners.
Turbine flow meter for applications with oil
Turbine flow meters offer rapid and precise measurement. They are particularly suitable for applications where high repeatability is required. Flow-optimized impellers minimize pressure loss.
The VCT-AN and VCT-HB measuring turbines from DDM Sensors are characterized by the following values:
- Connection: AN8, AN10, AN12 (VCT-AN)
- Hose connection Ø: 9.8 to 32 mm (VCT-HB)
- Measuring range: 0.1 to 350 l/min (depending on model)
- Repeatability: ± 0.025 % of the measured value
- Wetted temperature measuring point: Thermocouple type T
Special features:
- Fast and accurate measurement
- High repeatability
- Compact design
- Suitable for flammable and aggressive substances
The turbine measuring systems are particularly suitable for small installation spaces, flow measurement in road tests and for testing complex thermal management in vehicles with electric motors.
excl. 19% VAT plus shipping costs
Hose connection Ø: 9,8 to 32mm
Measurement range: 0,1 to 350l/min
Repeatability: ± 0,025 % of reading
Temperature probe media exposed: Type T thermocouple
Datasheet : pdf | 314 KB
excl. 19% VAT plus shipping costs
DDM Flow Turbines – innovative and miniaturized
The VCT series flow turbines measure flow rates from 0.05 to 350 liters per minute, with stainless steel housing and rotor designed for temperatures up to 125°C and pressures up to 25 bar. The optimized rotor geometry and hybrid ball bearing ensure excellent repeatability, while a contactless sensor detects turbine speed for TTL frequency output. An integrated data memory stores calibration data, and when paired with a VCA flow computer, the system achieves high accuracy, independent of fluid viscosity.
Ultrasonic flow meter for applications with oil
Ultrasonic flow meters offer non-contact measurement, making them virtually maintenance-free. They are suitable for all viscosities, densities, and conductivity levels.
The Atrato, MetraFlow and Process Atrato ultrasonic flow meters cover a wide range of applications:
- Connection: 3/8″ John Guest, 1/2″ BSP, 1/2″ NPT, 1/8″ & 1/4″ hose, ¼” BSP (depending on model)
- Measuring range: 0.002 to 20 l/min (depending on model)
- Repeatability: ±0.1% ; ±0.5% (< 25 v.MB), ±0.1% plus ±0.02% FSD , ±0.1% +0.005% FSD (depending on model)
- Wetted material: PEEK / 316 ; PEEK / borosilicate glass, PFA tubing with FDA approval, 316 and PEEK (depending on model)
- Output: Pulse (NPN or PNP); 4 – 20mA; 0 – 10V; 0 -5V; display (depending on model)
- Temperature range: -10 to 60°C, -10 to 110°C, -10 – 60°C (depending on model)
Special features:
- Non-contact measurement
- Low maintenance
- High precision
- Simple installation
The ultrasonic flow meters are ideal for precise inline flow measurement, especially for small quantities. They work without contact and can measure media of any viscosity, density and conductivity.
excl. 19% VAT plus shipping costs
Connection: 3/8” John Guest, 1/2” BSP, 1/2” NPT
Measurement range: 2 … 500ml/min to 0,1 … 20l/min
Repeatability: ±0.1% (25 to 100% v.MB); ±0.5% (< 25 v.MB)
Material of wetted parts: PEEK / 316 ; PEEK / Borosilikatglas
Output: Impuls (NPN or PNP); 4 – 20mA; 0 – 10V; 0 -5V; Display
Temperature range: -10 – 60°C, -10 – 110°C
Data sheet: pdf | 1 MB
excl. 19% VAT plus shipping costs
DDM Ultrasonic-Flowmeters – accurate and fully flexible
Ultrasonic flow meters provide precise, non-contact flow measurement for liquids with flow rates from 0.002 to 20 L/min. The Atrato series features a smooth, obstruction-free flow tube, while the MetraFlow series offers an FDA-approved PFA tube for high-purity applications. These meters measure flow velocity via ultrasonic transit times, ensuring accuracy regardless of pressure, temperature, or viscosity. They require minimal maintenance, have a long service life, and provide output via analog signals or an LCD display, making them ideal for oil applications.
Further components for an efficient measuring system
DDM Sensors provides additional components such as displays and flow computers for optimal measurement visualization and data processing. These components enable optimum visualization and further processing of the measurement data.
These include, for example
- Flow computer VCA: For linearization and viscosity correction, analogue output signal and CAN bus 2.0B available
- Pulsit Solo display: LCD display for current flow rate & total flow rate
- Pulsit Link converter: Linearization of measured values, programmable alarm outputs
excl. 19% VAT plus shipping costs
Input signal: max. 2,5 kHz (TTL)
Accuracy: ± 0,1%
Operating temperature range: -40 to +110°C
Output: 0 to 20mA or 4 to 20mA
Datasheet : pdf | 293 KB
excl. 19% VAT plus shipping costs
excl. 19% VAT plus shipping costs
LCD display: current flow rate & total flow rate
Possible units: Gal – cc – kg – gms – Ltr & sec – min – Hr
Power supply: 5 to 24Vdc or AA battery
Protection class: IP64
Data sheet Pulsit solo: pdf | 1,005 KB
excl. 19% VAT plus shipping costs
excl. 19% VAT plus shipping costs
Linearisation: Calibration points of the flow meter can be stored
Signal input: Pulse or Reed switch
Response time: from 100ms
Flow alarm outputs: programmable high and low alarms
Operating temperature range: 0 – 65°C
Protection class: IP64
Data sheet Pulsit Link: pdf | 490 KB
excl. 19% VAT plus shipping costs
Advantages of flow meters from DDM Sensors
High measuring accuracy and repeatability
Low-wear and durable design
High temperature and pressure resistance
Our flow meters ensure outstanding measurement accuracy and repeatability. This is ensured by a low measurement deviation and a high repeatability of the measured values. Turbine flow meters, for example, achieve a repeatability of up to ±0.025 %.
DDM Sensors’ flow meters are built for longevity with minimal wear and tear. This is achieved by using robust materials that are highly resistant to corrosion. In addition, the devices are characterized by low pressure losses and minimal maintenance requirements. The impeller flow meters, for example, have sapphire bearings, which ensure a particularly high level of robustness and durability.
Most models withstand temperatures up to 150°C and pressures of 10, 25, 500, and 700 bar. Special high-temperature and high-pressure versions are available for particularly demanding applications.
Flexible flow measurement of different oils
The flow meters from DDM Sensors can measure a wide range of oils. All DDM Sensors flow meters are either viscosity-independent or viscosity-compensated. The flow meters can measure oils regardless of their density and detect oils with suspended solids and impurities down to 80 microns, regardless of flow direction.
High precision in oil flow measurement
The flow meters from DDM Sensors are characterized by high measuring accuracy and repeatability. For example, the repeatability of turbine flow meters is up to ±0.025 % of the measured value. The linearity of the measured values ranges from ±1.0 % of the measured value to ±0.5 % of the measured value. The devices offer a high resolution, with the smallest measurable unit being in the milliliter range. Oval gear meters achieve a repeatability of ±0.1%. Ultrasonic flow meters achieve a repeatability of ±0.1% (25 to 100% v.MB); ±0.5% (< 25 v.MB).
Possible applications for the flow meters
The flow meters from DDM Sensors are suitable for a wide range of applications in the field of oil flow measurement:
Hydraulic systems & hydraulic oil monitoring
In hydraulic systems, flow meters precisely monitor hydraulic oil flow, ensuring optimal system performance. They enable the monitoring of flow rates, help diagnose system problems such as leaks or blockages and contribute to increasing efficiency. In hydraulic oil monitoring, they are used to detect changes in the oil flow at an early stage, which can indicate wear or contamination. This allows maintenance intervals to be optimized, failures to be avoided and the service life of hydraulic components to be extended.
Fuel consumption measurement (diesel, heating oil, biodiesel)
Flow meters are used for the precise measurement of fuel consumption in diesel engines, heating systems and biodiesel applications. They record the volume or mass flow of fuel in real time and enable precise consumption analysis. In vehicles, generators and industrial plants in particular, they help to increase efficiency by monitoring actual fuel consumption and identifying potential savings. Modern sensors often work with ultrasonic, turbine or Coriolis technology to deliver highly accurate measured values and compensate for external influences such as temperature or pressure fluctuations.
High compatibility for existing systems
DiThe flow meters offer various connection options and output signals to ensure easy integration into existing systems:
- Process connections: Threaded connection (BSP connections, NPT connections, AN connections), hose connection, quick connector (John Guest)
- Output: Pulse (NPN or PNP); 4 – 20mA; 0 – 10V; 0 -5V; CAN bus; display
The sensors are already calibrated on delivery and can be used immediately.
Durable and robust flow meters
DDM Sensors attaches great importance to high-quality materials and a robust design. The majority of models are designed for temperatures up to 150 °C and different pressure ranges (10, 25, 500 and 700 bar). Special high-temperature and high-pressure versions are available for demanding applications. The flow meters have protection classes up to IP67. In addition, measuring turbines from DDM Sensors with Pickoff can be supplemented with ATEX II 1 G Ex ia IIC approval.
Customized solutions for oil flow measurement
DDM Sensors offers customized solutions for oil flow measurement that are tailored to individual and industry-specific requirements. Our team develops innovative products for precise flow measurement in various industries. We attach great importance to the reliability, precision and optimum integration capability of the sensors and measuring systems. Thanks to our calibration laboratory, it is also possible to carry out high-precision calibrations for a wide range of customer-specific measuring media.
Get advice on flow meters for oil now
Contact our team at DDM Sensors for advice on flow meters for oil and to find a customized solution for your individual requirements.
