Testing and Measurement Equipment

VTH3ph and VTHR3ph 3-Phase Voltage Transducers for Voltage Sensing, Instantaneous or RMS Conversion

The VTH3ph and VTHR3ph voltage transducers are designed for converting AC or DC voltage to an isolated voltage or current loop output. These transducers are available in a wide input range from 0.333V to 600Vrms, making them suitable for a variety of voltage sensing applications. The VTH3ph models are optimized for instantaneous conversion, while the VTHR3ph models provide true RMS conversion up to 50kHz, along with comprehensive voltage analysis capabilities.

The VTH and VTHR voltage transducers convert DC or AC voltage to an isolated voltage or current loop output. The VTH models cover a range from 50mV to 500Vrms, with fast response capabilities, while the VTHR models offer true RMS conversion across a frequency range of DC to 10kHz. The sensors are available in AC only or AC + DC configurations, making them versatile for various industrial applications.

These transducers are ideal for voltage monitoring in systems such as DC drives, process control, rail transportation, and circuit breaker trip coils. The input voltage is isolated and converted to a DC output, ensuring high accuracy and safety in monitoring tasks.

For all models, NIST/NPL/UKAS traceable calibration certificates and certificates of conformance are available.

IRFrms RMS Converting AC Transducer

RMS Converter Transducers for AC to DC or AC+DC to DC Proportional Output

The IRFrms is an instantaneous to true RMS converter, offering high precision in converting AC or AC+DC signals into an isolated DC signal that represents the true RMS value. It matches the performance of high-end true RMS voltmeters, providing scalable outputs for voltage or 4-20mA current loops, with options for isolated or non-isolated configurations.

The VT7 and VT8 series voltage transducers are designed for measuring AC+DC and AC voltages in single-phase, split-phase, and three-phase systems. These models allow isolation, conditioning, and conversion of AC and DC voltages to a proportional RMS, mean, or instantaneous output.

With true RMS sensing, the VT8 series enables precise measurement of distorted waveforms up to the 9th harmonic with a crest factor of 5. Both the VT7 and VT8 transducers can handle distorted waveforms, making them ideal for environments like VFD controllers, UPS systems, and thyristor drives. Additionally, these voltage transducers offer 2.5kV isolation between the input and output, making them perfect for use in systems such as PLC computer systems, analog meters, and energy management systems.

The ATHiso current loop isolator is designed for converting and isolating current loop signals, such as 4-20mA or 4-12-20mA, to an isolated voltage or current loop output. This versatile device is ideal for eliminating ground loops, signal noise, and common mode voltage errors, making it a critical tool for ensuring high accuracy in process control and industrial applications.

The RCTi sensors are designed to convert AC current to an isolated 0-5V voltage or 4-20mA current loop output. They offer compatibility with existing 1A or 5A CT metering circuits using the TA5V-5A module. The RCTi sensors are available in proportional (RMS) or instantaneous output configurations. With current ranges from 0-100A to 0-300,000A peak, the sensors ensure accurate measurement over a wide bandwidth. Both single-phase and three-phase models are available.

For Fast Clip-Around Installation with True RMS Output

The RCTrms is an AC Rope CT (Current Transducer) designed for permanent installations. It combines the benefits of a thin, flexible, clip-around Rogowski coil with a signal conditioner, providing accurate true RMS measurement of AC current. Simple to install and retrofit, it is ideal for process control, system monitoring, and status alarming in various applications.

The LFR AC Current Probes are designed for fast and easy installation in confined spaces. Offering market-leading low-frequency performance, these probes ensure high accuracy, low phase shift, and low noise. They are optimized for precise measurement across a wide range of frequencies from 45Hz to 20kHz, with minimal phase error. The compact, low-cost, flexible, clip-around probe is dual-range and provides accurate current measurements, even for harmonically distorted waveforms.

IRF Clip-on Flexible Coil Current Sensing Probe

IP65 Rated | Current Transformer Replacement | Interface with Existing Metering Circuits

The IRF current probes offer robust, flexible clip-on sensing coils, allowing for fast and safe installation. Ideal for current monitoring and retrospective fitting, these probes are designed to replace conventional current transformers (CTs) with optional 1A or 5A output, making them fully compatible with installed CT circuits. This innovative technology eliminates many CT-related safety concerns by generating safe low-level signals, even with no secondary burden or loading.

With frequency bandwidths ranging from 1Hz to 1MHz, the IRF probes are perfect for single and three-phase power systems, handling harmonics, distorted waveforms, and even PWM motor drive signals. For added functionality, the optional IRF-rms converter can provide a DC output, making the IRF probes ideal for control and system monitoring. Common applications include SCADA systems, PLCs, digital storage oscilloscopes, data loggers, power meters, and power analyzers.

CTV Current Sensors: Flexible Rogowski Coil with Voltage Outputs

The CTV Current Sensors are innovative, flexible ‘rope-type’ Rogowski coil current transformers designed to provide voltage outputs compatible with most transducers. These sensors are ideal for both single-phase and three-phase systems, offering a wide range of current measurement from 100A to 10,000A. The CTV sensors convert alternating current (AC) into an isolated 0-0.333V, 0-5V, or 0-10V output, making them compatible with existing metering circuits. Unlike conventional CTs, CTV sensors have no open-circuit hazards, making them perfect for retrospective metering projects, confined spaces, or installations that require minimal downtime.