Differential pressure flow measurement for gas, steam and liquids

At systec Controls, deltaflow stands for flow measurement using the differential pressure (dp) method - highly accurate, reliable and robust.

The deltaflow series has been under constant development for many years. We not only draw on our own expertise, but also cooperate with renowned institutes such as the Chair of Fluid Mechanics at the University of Erlangen, the Physikalisch-Technische Bundesanstalt, the Institute of Thermodynamics in Munich and the Fraunhofer Institute.

The deltaflow dynamic pressure probe represents a revolution in differential pressure flow measurement: The flow measurement is as robust and reliable as with classical primary elements and has a very wide range of applications. Numerous patents protect the deltaflow dynamic pressure probe.

Differential pressure measurement for your application - the deltaflow series

The deltaflow differential pressure sensor for gas, steam and liquids

Low pressure loss, therefore high energy saving potential
Simple installation, without disconnecting the pipework
Lower weight, even with large diameters
Very accurate (deltaflow from 0.4%)
High measuring dynamics, up to 1:30 depending on application
Insensitive to contamination, condensate, etc.
Low acquisition costs, even with large diameters

Find out more about the deltaflow dynamic pressure probe!

deltaflowC: 3 measurements in one device - especially for gases

3 in 1: Differential pressure flow measurement of mass and volume as well as pressure and temperature measurement in one meter

Compensates for the effects of pressure and temperature on flow measurement
Specially designed for measuring and controlling ventilation systems and other gases in pipes and ducts
One fitting length for most pipework and ducts
Virtually maintenance free and drift free
Convertible to any gas without additional calibration effort

Find out more about deltaflowC!

deltaflow pitot: mobile dp gas flow measurement with maximum measurement linearity

Mobile gas flow measurement with deltaflow pitot: measures the performance of air conditioning and ventilation systems, as well as exhaust and combustion air volumes.

As accurate as our stationary alternative deltaflow
Accurately measures even low flow velocities
Tolerates flow at angles of up to 10º.
Resists condensation and dirt
Virtually indestructible and calibration free for decades
Accurate measurements even at temperatures >1,000°C (depending on material)
Available with accessories in user-friendly travel case

Learn more about portable dp measurement with deltaflow pitot!

deltaflowB: Rethinking dp measurement - especially for engine test bench measurement

Mass airflow sensor reference system for engine test benches

Combination of low pressure loss venturi and airfoil probe. This combination reduces the permanent pressure loss to well below 10% of the measured differential pressure, i.e. even at design flow the pressure loss is <20mbar.
CAN-based sensors measure up to 2kHz
Calculates accurate air mass flows thanks to sophisticated filter strategies that separate pressure and flow pulsations
Insensitive to dirt and condensation
Insensitive to fouling and contamination
Wide temperature and pressure range
Highly accurate

Learn more about deltaflowB airflow sensor for engine test benches!

deltafit: Airflow monitoring and control - especially for wastewater treatment and power plants

Precise air volume control for wastewater treatment plants and power stations with our deltafit air volume regulator

Designed and optimised for use in large and small wastewater treatment plants and for combustion air control, for example in steam boilers in waste-to-energy plants
Built-in rectifier function
No inlet section required
Easy to parameterise using Windows software
Insensitive to fouling and condensation
No drift
Virtually maintenance free
Highly accurate results

Find out more about deltafit - the precise air volume regulator!

SYS-MMF: easy to parameterise - the multivariable transmitter

Multivariable mass flow transmitter using the differential pressure method - for gases, saturated and superheated steam and liquids

Measures static pressure p1 internally
Has a 3 wire PT100 input to compensate for fluid temperature
A 2-wire 4..20mA transmitter as standard (HART capable)
Optional additional Modbus interface
Easy to parameterise
Saves time and money

Find out more about the easy to use, low-cost multivariable transmitter SYS-MMF!

The deltaflowC gas flow meter from systec Controls also uses the differential pressure principle. It is the world's smallest and fastest multivariable transmitter for measuring the mass flow of gases and enables precise real-time flow measurement. Highly sensitive sensors for differential pressure, static pressure and temperature as well as a powerful processor are integrated in the smallest possible space. The deltaflowC can measure mass flow up to 2000 times per second, providing accurate measurements even in highly dynamic processes such as pulsating compressed air at the compressor or exhaust gases from combustion engines.

deltaflowC is available in two versions:

As an insertion probe for pipes from DN32 and as a screw-in venturi for smaller pipes with a diameter of 3/4 to 1.5 inches. The diameter of the screw-in venturi can be flexibly adjusted to cover a wide measuring range.

Both versions are easy to install: The probe version requires only a fitting on the pipe, while the venturi version is simply screwed into a piece of pipe.

The microcontroller determines the physical quantities dp, pabs and T ultra-fast, filters the values using patented methods and provides the user with the mass flow signal as well as the pressure and temperature signals.

As a result, deltaflowC is not only suitable for measuring stationary flows, but also copes with high measurement dynamics and pulsations where other mass flow measurement methods fail.