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Clamp-on AC Current Transducer - 10 - 25 - 50 Amps (CT-153)
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Clamp-on AC Current Transducer - 10 - 25 - 50 Amps (CT-153)

The CT153 is a compact, split-core current transducer designed for use with the ACR SRX3 Current Logger in long-term monitoring applications. It supports field-selectable current ranges, allowing installers to right-size measurements and leave sensors in place for days, weeks, or months without disconnecting conductors or disrupting service.

Key Features

  • Split-Core, Clamp-On Installation - Installs around energized conductors without disconnecting cables or shutting down equipment.
  • No External Power Required - Designed for straightforward installation without additional power supplies or signal conditioning.
  • Designed for SRX3 Current Logging - Optimized for use with the ACR SRX3 in long-term monitoring applications.
  • Field-Selectable Current Ranges - Allows a single CT to support multiple current levels, making it easier to right-size measurements in the field.
  • Clamp-and-Leave Deployment - Intended to remain installed for extended periods—days, weeks, or months—during load studies or monitoring campaigns.

This probe is intended for use with the SRX3 AC Current Data Logger

SKU: 35-0047
$139.00 USD

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Description Specifications Software Documentation Q&A

The CT153 is a split-core current transducer designed to support long-term current logging when used with the ACR SRX3 Current Data Logger. It is intended for applications where current needs to be measured over extended periods—such as load studies, energy audits, and utility or industrial monitoring—without interrupting service or disconnecting conductors.

Unlike handle-style clamp probes commonly used for spot checking, the CT153 is designed for clamp-and-leave installations. Once installed, it can remain in place inside a closed electrical panel for days, weeks, or months, making it well suited for multi-phase monitoring and deployments where panel space and clearance are limited.

The CT153 offers field-selectable current ranges, allowing installers to right-size the measurement based on the expected load. This flexibility reduces the need to carry multiple CT models while still supporting accurate current logging across a range of applications.

When paired with the SRX3, the CT153 provides a practical balance of flexibility, compact size, and ease of installation, well suited to long-term current monitoring applications.

Specifications

Physical Dimensions

Current Measurement

  • Measured quantity: AC current
  • Field-selectable current ranges:
    Low, medium, and higher current ranges (10, 25, and 50 Amps AC) suitable for load profiling and long-term monitoring
  • Accuracy: Specified as a percentage of full scale (see datasheet)

Compatibility

  • Designed for use with: ACR SRX3 Current Logger
  • Integration: Direct connection; no external signal conditioning required
  • Power: Self-powered from the measured conductor

Installation & Mechanical

  • Sensor type: Split-core, clamp-on current transducer
  • Installation method: Installs around energized conductors without disconnecting wiring
  • Form factor: Compact, low-profile design suitable for crowded panels
  • Deployment: Intended for long-term, clamp-and-leave installations
  • Cable: Pre-attached lead with terminal connection

Environmental

  • Operating temperature: Suitable for industrial electrical enclosures
  • Humidity: Designed for use in non-condensing environments
  • Maximum conductor voltage: Rated for use on typical low- and medium-voltage electrical systems

Compliance

  • Certifications: UL, CE

Software

ACR software tools are intuitive and flexible, allowing you to easily configure ACR data loggers to collect the data you need. Once downloaded, your data is displayed in presentation-quality graphs and can be converted into popular formats for use with spreadsheet programs, document editors, and other third-party applications.

Documentation

For a product sheet, please click below for a pdf version.

Product Sheet

Q&A

What does “field-selectable current ranges” mean?

Field-selectable ranges allow the installer to choose the most appropriate current range during installation. This helps right-size the measurement to the expected load and allows a single CT153 to be used across different applications. The ranges are set through the use of dip switches on the current probe.

Which current range should I select?

In general, select the lowest range that safely covers the expected current. Choosing a range that closely matches the load typically provides better measurement quality than using a higher-than-necessary range.

Can the CT153 be installed without shutting down equipment?

Yes. The CT153 is a split-core, clamp-on transducer and can be installed around energized conductors without disconnecting wiring or interrupting service.

Does the CT153 require an external power supply?

No. The CT153 is self-powered from the measured conductor and does not require an external power source.

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