High-accuracy sensors for AC/DC current measurement and power analysis. From current clamps to high-precision zero flux current transducers and Rogowsky coils.
Our current transducers are a perfect fit for our data acquisition systems and can precisely measure AC/DC current with up to 0.03% accuracy. TEDS is equipped for automatic detection and setup.
 
DC-CT® current transducers
Dewesoft DC-CT® current transducers are designed for precise current measurement applications. It is based on current-controlled variable reluctance (CCVR). It offers all the benefits of a zero-flux current transducer but with lower power consumption and in a smaller form factor.
 
The DC-CT® transducers can be seen as an AC current transformer, where primary and secondary windings are coupled by a common high permeability core. Just as with other closed-loop techniques our technology continuously measures residual magnetic flux in the core resulting from the difference between the primary and secondary currents. The detected difference drives the feedback control mechanism that adjusts the current in the compensation winding to achieve the optimal zero-flux balance in the core. 
DC-CT® technology with the Platiše Flux Sensor (PFS) represents the latest current sensing technology suitable for accurate current measurements. The device offers:
 
A wide measurement range.
High bandwidth.
Excellent linearity.
Very high accuracy.
Very low-temperature drift.
Low power consumption compared to other zero-flux type current transducers. Lower power consumption also enables a more compact form factor.
 
Zero-Flux Transducers High-Precision Current Sensors
Dewesoft IT series of zero-flux transducers offer highly precise current measurements with linearity below 0.002% ranging from 100 A to 2000 A RMS, featuring up to 2 MHz bandwidth which makes them perfect for E-Mobility and inverter motor measurements.
 
Iron-Core Current Transformers
The iron-core current clamp works on the principle of a transformer. Depending on the number of windings on the primary side compared to the secondary side (turns ratio), a certain current will be induced on the secondary side. Like any transformer, this only works for measuring AC current.
 
The DS-CLAMP-xxAC offers measurement ranges from 5 ACRMS up to 1000 ACRMS, with a bandwidth up to 10kHz. Measurement accuracy is from 0,3% to 3,5% depending on the measurement range.
 
Hall-Compensated Current Clamps
The Hall Effect is conveniently used to measure both the AC and DC current. The advantages of hall-compensated AC/DC current clamps are high accuracy, a high bandwidth, the measurement of AC and DC currents and the circuit doesn't need to be opened.
 
The DS-CLAMP-xxDC offers measurement ranges up to 1800 A DC and ACrms, with a bandwidth of up to 100 kHz depending on the model.
 
Fluxgate Current Clamps
Fluxgate current sensors make use of a high permeability magnetic core in order to ascertain the magnetic field that is produced as the current flows through a conductor. Fluxgate technology depends on a negative feedback circuit, including a magnetic circuit. This is done by reverting a current back through the feedback coil so that the magnetic flux can be canceled out. The magnetic flux is caused in the coil by the current that is measured. This decreases the effect of the material’s magnetic nonlinearity, as it is compensated and can be kept low.
 
The DS-CLAMP-xxDC offers measurement ranges up to 1000 A DC and ACrms, with a bandwidth up to 500 kHz depending on the model.
 
They offer excellent accuracy of 0,3% depending on the measurement range. Operating temperatures from -40°C to 85°C, and the ability to measure coil diameters of up to 50 mm depending on the model.
 
Rogowsky Coil Current Probes
Rogowsky coils are easy to install and therefore perfect for field measurements.
A wide variety of ranges are available from 3 A to 30.000 A ACrms with accuracies down to 0.1 %. The bandwidth is starting from 10 Hz and is ending at 1 MHz.
Please see the full technical specification for more details.
 
Current Shunt DSI Current Adapters
While some amplifiers offer direct measurements of small range current inputs. Dewesoft offers external shunt adapters for direct current measurement. The DSI adapters are compatible with all Dewesoft data acquisition systems that have DSUB9 input connectors. The following DSI shunt current adapters are available:
 
DSI-20mA - 20 mA current input adapter with 50 Ohm internal shunt, 0.05% accuracy for sensors with 4 to 20 mA output.
DSIw-20mA - Waterproof version of the DSI-20mA adapter. It uses a 50 Ω shunt resistor with 0.01 % accuracy and 0.2 ppm/K temperature drift (0.05 ppm/K in the temperature range 0 °C to 60 °C). It is designed for sensing current from industrial sensors with 4-20 mA output in harsh environments. It is designed with a double DSUB9 adapter hood with IP67 protection.
DSI-5A - The new 5A current input adapter. Contains a 10 mΩ shunt resistor with 0.1% accuracy when calibrated. The new DSI-5A adapter has significant improvement is in temperature stability. The new shunt resistor has two times better temperature coefficient (now 15 ppm/K over the range -55 °C to +125 °C, before 30 ppm/K over the range -20 °C to +60 °C).
DSIi-10A - isolated current transducer with 10 A FS and < 0.5% accuracy with banana connector inputs.
DSIi-20A - isolated current transducer with 20 A FS and < 0.5% accuracy with banana connector inputs.
 
SIRIUS PWR-MCTS2 An Integrated Power Supply
Most of the Dewesoft current sensors are powered directly from the host-connected amplifier. For the current sensors that require an additional power supply, we offer an integrated power supply slice - SIRIUS PWR-MCTS2. 
 
SIRIUS PWR-MCTS2 is a power supply unit for powering these current transducers directly from the Dewesoft DAQ system without any external power supply. SIRIUS PWR-MCTS2 is available as a slide-in module for SIRIUS rack mainframe chassis  (R1DB/R2DB, R4, R8) or as a standalone slice in the form of SIRIUS modular chassis.
 
SIRIUS® XHS-PWR - Voltage and current measurement device with integrated DC-CT current transducer
The SIRIUS® XHS-PWR is a power measurement device designed for direct in-vehicle measurement of current, voltage, and power. It features an integrated and patented DC-CT current transducer for very precise current measurements in the most demanding applications such as high current peaks as well as leakage current measurement.