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Clamp-on AC Current Transducer - 250 Amps 50/60Hz - (CT-253)
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The CT-253 is a 250 A AC clamp-on current transducer designed for safe, accurate measurement of electrical current in power distribution systems. It connects directly to the SRX3 AC Current Data Logger, SmartReader Plus 3, or the CAL Compressed Air Logger to convert live AC current into a proportional signal the logger can record. With its split-core design, the CT-253 installs easily without disconnecting wires or interrupting power — perfect for energy audits, load studies, HVAC system testing, and long-term performance monitoring.

Key Features

  • Clamp-on design – Non-intrusive installation without breaking the circuit.
  • 250 A AC range – Ideal for branch circuits, motors, and equipment loads.
  • Output: 0–5 V DC proportional to measured current.
  • Safe and durable – Molded housing with insulated jaws for dependable field use.
  • Compact form factor – Fits easily in panels or tight enclosures.
SKU: 35-0048
$291.00 USD

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Description Specifications Software Documentation Q&A

Typical Applications

  • Measuring three-phase motor loads and verifying balance.

  • Conducting energy audits and 30-day load studies.

  • Monitoring compressors, pumps, lighting, and HVAC equipment.

  • Supporting LEED and energy-management documentation.



*A $40 USD shipping fee will be applied to this product.

Specifications

Range 5A to 250A
Size 1.5m (5ft), 1.9cm (0.78in) clamp inside diameter

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

Calibration

Data loggers are often used in highly regulated environments such as food and pharmaceutical production and storage where strict safety regulations apply. Regulatory agencies generally require proof of calibration.

ACR calibrations are performed using reference standards that have been calibrated and are traceable to the US National Institute of Standards & Technology (NIST). This ensures that all ACR data loggers meet, and perform to, their published specifications, allowing you to be confident that they will assist you in achieving your compliance requirements.

Calibration certificates are provided with every calibration we perform. ACR Systems is an ISO 9001:2015 registered company and calibration records are kept as part of our quality system and can be made available for customer audits.

Calibration Service

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Translation missing: en.general.search.loading
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