Nagano, Japan, 12^th February 2025 – Hioki E.E. Corporation proudly announces the launch of the AC/DC Current Probes CT6833 and CT6834, next-generation clamp-type sensors designed to set a new benchmark in precision and usability for automotive power testing. These probes are 50% smaller than Hioki’s existing CT6843A and CT6844A models, offering superior usability and flexibility for even the most space-constrained environments. Designed to support Worldwide Harmonized Light Vehicles Test Procedure (WLTP) and SAE J1634 standards, the CT6833 and CT6834 empower automotive manufacturers and testing laboratories with unparalleled accuracy and improved ease of installation.

The WLTP and SAE J1634 standards ensure globally harmonized protocols for measuring fuel and electricity consumption, emissions, and energy efficiency. These regulations require precise current (Ah) or power (Wh) integration for recharging and discharging vehicle batteries. The compact, refined design of the CT6833 and CT6834 enhances installation workflows, reduces setup times, and ensures reliable results, even in the crowded engine bays of modern vehicles.
 

Development Background

The automotive industry is undergoing a global transition toward electrification, driven by advancements in technology and environmental regulations. By 2030, electric vehicles (EVs) are projected to make up 45% of global passenger vehicle sales, increasing to 73% by 2040, according to BloombergNEF¹. Despite this long-term growth, there has been a recent slowdown in EV production in certain regions, due to challenges such as high costs, supply chain disruptions, and shifting market conditions.²
However, this short-term slowdown has not deterred the overall global shift toward electrification, as manufacturers and governments remain committed to sustainable transportation goals. This commitment underscores the continued need for precise and reliable tools to support energy efficiency and regulatory compliance testing.
The growing adoption of electrified vehicles (xEVs) and the increasing complexity of automotive systems driven by Advanced Driver Assistance Systems (ADAS) have placed significant demands on vehicle testing procedures. ADAS encompasses technologies like adaptive cruise control, lane-keeping assistance, and automatic emergency braking, all of which require increased energy consumption and precision in power management.
Additionally, modern vehicles incorporate a growing number of Electronic Control Units (ECUs) and auxiliary systems, significantly increasing energy demand and necessitating advanced measurement tools to monitor and optimize both main and auxiliary power usage. WLTP and Real Driving Emissions (RDE) standards emphasize the need for accurate, real-world measurements of energy consumption. As vehicles become more densely wired, test engineers face challenges in making connections, underscoring the need for compact and versatile solutions. Hioki developed the AC/DC Current Probes CT6833 and CT6834 in response to these industry needs, integrating feedback from global automotive manufacturers, testing facilities, and extensive field trials to create a product that excels in real-world applications.
The result is a sensor that not only achieves DC accuracy of ±0.07%, rivalling pass-through sensors, but also features a 50% smaller form factor compared to previous models, for ease of installation in confined spaces, reducing setup time and the risk of damage during forced attachment. These improvements make the AC/DC Current Probes CT6833 and CT6834 indispensable tools for meeting modern regulatory standards and optimizing vehicle energy efficiency.
 

• 1: BloombergNEF Electric Vehicle Outlook 2024
• 2: Goldman Sachs: Why Are EV Sales Slowing?

Key Features

Unmatched Accuracy

The CT6833 and CT6834 offer industry-leading DC accuracy of ±0.07%, making them ideal for meeting stringent standards like WLTP and SAE J1634. These sensors minimize the influence of conductor positioning, ensuring consistent and reliable data across various testing scenarios.

Compact and Versatile Design

With a 50% smaller form factor compared to previous models, these probes are designed for effortless installation in tight spaces, such as crowded engine compartments. This compact size reduces setup time and minimizes the risk of sensor damage during forced attachment, enhancing usability in demanding environments.

Wide Current Range and Durability

Capable of measuring up to 200 A rms or 600 A peak (CT6833/CT6833-01) and 500 A rms or 800 A peak (CT6834/CT6834-01), these probes cater to a broad spectrum of power consumption needs. They are built to perform reliably in extreme conditions, with an operating temperature range from -40°C to 85°C, ensuring durability in diverse environments.

Expanded Cable Options

Hioki has introduced 5 m (CT6833/CT6834) and 10 m cable (CT6833-01/CT6834-01) options, providing greater flexibility for testing setups. These longer cables address the limitations of previous models and enhance the sensors' adaptability for various use cases.

User-Friendly Lock Mechanism

The lock can be easily engaged and disengaged with a single finger, simplifying installation and removal. This feature streamlines operations and improves efficiency during setup.

Symmetrical Design for Improved Workability

The symmetrical design allows the sensors to be used effectively regardless of the current direction, offering enhanced flexibility and ease of use during testing.

Multi-System Compatibility

The CT6833 and CT6834 are fully compatible with Hioki’s Power Analyzers (PW3390, PW6001, PW8001), Power Measurement Module M7103, and sensor units such as CT9555, CT9556, CT9557, and U8977. This ensures seamless integration into existing testing environments and a versatile solution for a variety of applications.

Main applications

Fuel and Electricity Consumption Testing

The CT6833 and CT6834 are designed to support WLTP and SAE J1634 testing environments, enabling precise current (Ah) and power (Wh) integration during battery recharging and discharging cycles. These measurements are critical for determining energy efficiency and compliance.

Auxiliary Battery Load Measurement

These probes are ideal for monitoring auxiliary systems such as ADAS, infotainment, and lighting, helping manufacturers optimize energy distribution and reduce power losses caused by the increasing number of ECUs in modern vehicles.

R&D and Compliance Testing

For automotive research teams and testing laboratories, the CT6833 and CT6834 enable precise, reliable data collection to ensure compliance with global energy and emissions standards.

Link

For more information, please refer to AC/DC CURRENT PROBE CT6833/CT6833-01, AC/DC CURRENT PROBE CT6834/CT6834-01 Product website.

Contact us

For inquiries such as quotes, demonstrations, and trial usage, please use Hioki’s contact form for a personalized reply from your closest or most appropriate Hioki representative.

• The information provided is current as of the date of publishing.
• Please note that prices, specifications, and other information contained in this texts are subject to change without notice.
• The company names and product names used in this text are registered trademarks or trademarks of their respective companies.

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