The CAL Compressed Air Logger offers a compact, battery-powered solution for comprehensive pneumatic system analysis. It simultaneously records air pressure (up to 150 PSI), temperature, relative humidity, and 3-phase AC current via clamp-on probes. With a high-speed 1 s sampling rate, 6 MB memory (typical 7-day cycle), quick-release pressure fitting, and compatibility with external transducers, it’s perfect for efficiency audits, leak detection, and system troubleshooting. Includes easy-to-use TrendReader software and NIST calibration option.

Key Features

  • Multi-Parameter Monitoring – Tracks pressure (up to 150 PSI), temperature, RH, and AC current all in one logger.
  • High-Speed Sampling – 1-second intervals with enough memory for a full 7-day logging cycle.
  • Fast Setup – Quick-release pressure fitting supports rapid installation and system testing.
  • Expandable Connectivity – Supports external sensors (flow, high-pressure, process transducers) for added insight.
  • Portable & Durable – Lightweight (120 g), battery-powered, and rugged (Noryl® plastic, –40 to 70 °C)
  • Easy Analysis – Comes with TrendReader software for seamless data visualization and export.
  • Accurate & Certified – Pressure accuracy: ±0.7 PSI; optionally calibrated to NIST standards.
SKU: 01-0138
$1,885.00 USD

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The CAL Compressed Air Logger goes beyond simple pressure monitoring. By combining pressure measurement (up to 150 PSI) with three-phase current logging, it allows you to directly correlate compressor load with system demand. This makes it an invaluable tool for:

  • Energy Audits & Load Studies – Track compressor cycling and current draw to identify opportunities for energy savings.

  • Leak Detection – Compare pressure profiles against expected current loads to uncover inefficiencies and wasted air.

  • System Troubleshooting – Diagnose issues in pneumatic control systems by monitoring both supply pressure and electrical behavior.

  • Performance Benchmarking – Establish baseline data for predictive maintenance and long-term system optimization.

Its compact, portable design makes it ideal for service technicians, plant engineers, and energy consultants who need a reliable way to analyze compressed air systems in the field. With the included TrendReader software, data can be quickly visualized, exported, and shared to support corrective action or long-term planning.

Accessories & Related Products
The CAL Compressed Air Logger is designed to work seamlessly with AC current transducers for three-phase load studies. Clamp-on probes make it easy to capture current flow without disconnecting wiring, ensuring quick and safe installation. By pairing the logger with the right transducers, you can:

  • Measure compressor energy consumption across all three legs.

  • Identify imbalances between phases that may signal equipment wear or wiring issues.

  • Correlate pressure drops with electrical load to pinpoint leaks or system inefficiencies.

Additional accessories such as high-pressure and flow transducers expand the CAL’s capabilities even further, giving you a complete toolkit for auditing compressed air systems and improving overall efficiency.

    Specifications

    Battery 1.6 AH 3.6V Lithium
    Baud Rate 460K800 (<2.5 min Backup)
    Case Material Noryl® Plastic
    Channel Accuracy - Current AEMC CT: ±5A over 0-250A up to 500A
    Channel Accuracy - Pressure ±0.7 PSI (±0.5 Pa)
    Channel Accuracy - Process ±0.5% FS + Transducer
    Channel Accuracy - RH ±3% RH over 10 to 90% RH
    Channel Accuracy - Temperature ±0.3°C over 0 to 70°C (±0.5°F over 32 to 158 to 158°F)
    Clock Accuracy ±1 sec over 7 days
    Dimensions 110 x 70 x 20 mm (4.3 x 2.6 x 0.8 in)
    Input Impedance CH3: I:125Ώ, V:> 100KΏ
    Input Mode Dependent CH4-7: I:400Ώ, V:> 100kΏ
    interface Cable IC-102 USB to Logger
    Memory Size 6MB (5 channels at 1 second for 7 days)
    Operating Limits -40 to 70°C (-40 to 158°F)
    Recording Mode Stop on Full or First-In-First-Out
    Resolution 12 bit Converter 1 part in 4096
    Sampling Method Average or Spot Reading
    Software Version TrendReader 3.09 or Later
    Weight 120g (4 oz)

    Accessories

    Software & Interface Cable are required for full functionality of the product.

    35-0050 - 1000A CT-153 - 50A CT-253 - 250A CT-353 - 500A

    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.

    TrendReader Full License TrendReader Interface Pkg TrendReader on USB Full

    Documentation

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

    Product Sheet

    Q&A

    Click here to visit our NEW Q&A pages.

    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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This makes it an invaluable tool for:\u003c\/p\u003e\n\u003cul data-start=\"531\" data-end=\"1040\"\u003e\n\u003cli data-start=\"531\" data-end=\"657\"\u003e\n\u003cp data-start=\"533\" data-end=\"657\"\u003e\u003cstrong data-start=\"533\" data-end=\"565\"\u003eEnergy Audits \u0026amp; Load Studies\u003c\/strong\u003e – Track compressor cycling and current draw to identify opportunities for energy savings.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"658\" data-end=\"781\"\u003e\n\u003cp data-start=\"660\" data-end=\"781\"\u003e\u003cstrong data-start=\"660\" data-end=\"678\"\u003eLeak Detection\u003c\/strong\u003e – Compare pressure profiles against expected current loads to uncover inefficiencies and wasted air.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"782\" data-end=\"919\"\u003e\n\u003cp data-start=\"784\" data-end=\"919\"\u003e\u003cstrong data-start=\"784\" data-end=\"810\"\u003eSystem Troubleshooting\u003c\/strong\u003e – Diagnose issues in pneumatic control systems by monitoring both supply pressure and electrical behavior.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"920\" data-end=\"1040\"\u003e\n\u003cp data-start=\"922\" data-end=\"1040\"\u003e\u003cstrong data-start=\"922\" data-end=\"950\"\u003ePerformance Benchmarking\u003c\/strong\u003e – Establish baseline data for predictive maintenance and long-term system optimization.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1042\" data-end=\"1369\"\u003eIts compact, portable design makes it ideal for service technicians, plant engineers, and energy consultants who need a reliable way to analyze compressed air systems in the field. 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By combining pressure measurement (up to 150 PSI) with three-phase current logging, it allows you to directly correlate compressor load with system demand. This makes it an invaluable tool for:\u003c\/p\u003e\n\u003cul data-start=\"531\" data-end=\"1040\"\u003e\n\u003cli data-start=\"531\" data-end=\"657\"\u003e\n\u003cp data-start=\"533\" data-end=\"657\"\u003e\u003cstrong data-start=\"533\" data-end=\"565\"\u003eEnergy Audits \u0026amp; Load Studies\u003c\/strong\u003e – Track compressor cycling and current draw to identify opportunities for energy savings.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"658\" data-end=\"781\"\u003e\n\u003cp data-start=\"660\" data-end=\"781\"\u003e\u003cstrong data-start=\"660\" data-end=\"678\"\u003eLeak Detection\u003c\/strong\u003e – Compare pressure profiles against expected current loads to uncover inefficiencies and wasted air.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"782\" data-end=\"919\"\u003e\n\u003cp data-start=\"784\" data-end=\"919\"\u003e\u003cstrong data-start=\"784\" data-end=\"810\"\u003eSystem Troubleshooting\u003c\/strong\u003e – Diagnose issues in pneumatic control systems by monitoring both supply pressure and electrical behavior.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"920\" data-end=\"1040\"\u003e\n\u003cp data-start=\"922\" data-end=\"1040\"\u003e\u003cstrong data-start=\"922\" data-end=\"950\"\u003ePerformance Benchmarking\u003c\/strong\u003e – Establish baseline data for predictive maintenance and long-term system optimization.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1042\" data-end=\"1369\"\u003eIts compact, portable design makes it ideal for service technicians, plant engineers, and energy consultants who need a reliable way to analyze compressed air systems in the field. With the included TrendReader software, data can be quickly visualized, exported, and shared to support corrective action or long-term planning.\u003c\/p\u003e\n\u003cp data-start=\"1371\" data-end=\"1712\"\u003e\u003cstrong data-start=\"1371\" data-end=\"1405\"\u003eAccessories \u0026amp; Related Products\u003c\/strong\u003e\u003cbr data-start=\"1405\" data-end=\"1408\"\u003eThe CAL Compressed Air Logger is designed to work seamlessly with AC current transducers for three-phase load studies. Clamp-on probes make it easy to capture current flow without disconnecting wiring, ensuring quick and safe installation. By pairing the logger with the right transducers, you can:\u003c\/p\u003e\n\u003cul data-start=\"1714\" data-end=\"1960\"\u003e\n\u003cli data-start=\"1714\" data-end=\"1778\"\u003e\n\u003cp data-start=\"1716\" data-end=\"1778\"\u003eMeasure compressor energy consumption across all three legs.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1779\" data-end=\"1866\"\u003e\n\u003cp data-start=\"1781\" data-end=\"1866\"\u003eIdentify imbalances between phases that may signal equipment wear or wiring issues.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1867\" data-end=\"1960\"\u003e\n\u003cp data-start=\"1869\" data-end=\"1960\"\u003eCorrelate pressure drops with electrical load to pinpoint leaks or system inefficiencies.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1962\" data-end=\"2177\"\u003eAdditional accessories such as high-pressure and flow transducers expand the CAL’s capabilities even further, giving you a complete toolkit for auditing compressed air systems and improving overall efficiency.\u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e"}
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    {"id":7344353902763,"title":"CAL Compressed Air Data Logger – 150 PSI with AC Current Monitoring","handle":"cal-compressed-air-logger","description":"\u003cp data-start=\"264\" data-end=\"529\"\u003eThe CAL Compressed Air Logger goes beyond simple pressure monitoring. By combining pressure measurement (up to 150 PSI) with three-phase current logging, it allows you to directly correlate compressor load with system demand. This makes it an invaluable tool for:\u003c\/p\u003e\n\u003cul data-start=\"531\" data-end=\"1040\"\u003e\n\u003cli data-start=\"531\" data-end=\"657\"\u003e\n\u003cp data-start=\"533\" data-end=\"657\"\u003e\u003cstrong data-start=\"533\" data-end=\"565\"\u003eEnergy Audits \u0026amp; Load Studies\u003c\/strong\u003e – Track compressor cycling and current draw to identify opportunities for energy savings.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"658\" data-end=\"781\"\u003e\n\u003cp data-start=\"660\" data-end=\"781\"\u003e\u003cstrong data-start=\"660\" data-end=\"678\"\u003eLeak Detection\u003c\/strong\u003e – Compare pressure profiles against expected current loads to uncover inefficiencies and wasted air.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"782\" data-end=\"919\"\u003e\n\u003cp data-start=\"784\" data-end=\"919\"\u003e\u003cstrong data-start=\"784\" data-end=\"810\"\u003eSystem Troubleshooting\u003c\/strong\u003e – Diagnose issues in pneumatic control systems by monitoring both supply pressure and electrical behavior.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"920\" data-end=\"1040\"\u003e\n\u003cp data-start=\"922\" data-end=\"1040\"\u003e\u003cstrong data-start=\"922\" data-end=\"950\"\u003ePerformance Benchmarking\u003c\/strong\u003e – Establish baseline data for predictive maintenance and long-term system optimization.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1042\" data-end=\"1369\"\u003eIts compact, portable design makes it ideal for service technicians, plant engineers, and energy consultants who need a reliable way to analyze compressed air systems in the field. With the included TrendReader software, data can be quickly visualized, exported, and shared to support corrective action or long-term planning.\u003c\/p\u003e\n\u003cp data-start=\"1371\" data-end=\"1712\"\u003e\u003cstrong data-start=\"1371\" data-end=\"1405\"\u003eAccessories \u0026amp; Related Products\u003c\/strong\u003e\u003cbr data-start=\"1405\" data-end=\"1408\"\u003eThe CAL Compressed Air Logger is designed to work seamlessly with AC current transducers for three-phase load studies. Clamp-on probes make it easy to capture current flow without disconnecting wiring, ensuring quick and safe installation. By pairing the logger with the right transducers, you can:\u003c\/p\u003e\n\u003cul data-start=\"1714\" data-end=\"1960\"\u003e\n\u003cli data-start=\"1714\" data-end=\"1778\"\u003e\n\u003cp data-start=\"1716\" data-end=\"1778\"\u003eMeasure compressor energy consumption across all three legs.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1779\" data-end=\"1866\"\u003e\n\u003cp data-start=\"1781\" data-end=\"1866\"\u003eIdentify imbalances between phases that may signal equipment wear or wiring issues.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1867\" data-end=\"1960\"\u003e\n\u003cp data-start=\"1869\" data-end=\"1960\"\u003eCorrelate pressure drops with electrical load to pinpoint leaks or system inefficiencies.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1962\" data-end=\"2177\"\u003eAdditional accessories such as high-pressure and flow transducers expand the CAL’s capabilities even further, giving you a complete toolkit for auditing compressed air systems and improving overall efficiency.\u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e","published_at":"2022-06-23T13:46:41-07:00","created_at":"2022-06-06T13:49:11-07:00","vendor":"ACR Systems","type":"","tags":["CAL Family"],"price":188500,"price_min":188500,"price_max":188500,"available":true,"price_varies":false,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":41851838529707,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"01-0138","requires_shipping":true,"taxable":true,"featured_image":{"id":32297203761323,"product_id":7344353902763,"position":1,"created_at":"2022-06-10T10:18:34-07:00","updated_at":"2022-06-10T10:18:35-07:00","alt":null,"width":1200,"height":851,"src":"\/\/www.acrdatasolutions.com\/cdn\/shop\/products\/CAL-Logger_Picture.jpg?v=1654881515","variant_ids":[41851838529707]},"available":true,"name":"CAL Compressed Air Data Logger – 150 PSI with AC Current Monitoring","public_title":null,"options":["Default Title"],"price":188500,"weight":0,"compare_at_price":null,"inventory_management":null,"barcode":"","featured_media":{"alt":null,"id":24665505530027,"position":1,"preview_image":{"aspect_ratio":1.41,"height":851,"width":1200,"src":"\/\/www.acrdatasolutions.com\/cdn\/shop\/products\/CAL-Logger_Picture.jpg?v=1654881515"}},"requires_selling_plan":false,"selling_plan_allocations":[]}],"images":["\/\/www.acrdatasolutions.com\/cdn\/shop\/products\/CAL-Logger_Picture.jpg?v=1654881515","\/\/www.acrdatasolutions.com\/cdn\/shop\/products\/3344_400_300_300x300_2a2c8f8d-7738-4436-ad96-899322ca0c54.jpg?v=1654881661","\/\/www.acrdatasolutions.com\/cdn\/shop\/products\/3342_400_300_300x300_842fe7b4-4d26-4806-ad43-37fd880dbcbd.jpg?v=1654881698"],"featured_image":"\/\/www.acrdatasolutions.com\/cdn\/shop\/products\/CAL-Logger_Picture.jpg?v=1654881515","options":["Title"],"media":[{"alt":null,"id":24665505530027,"position":1,"preview_image":{"aspect_ratio":1.41,"height":851,"width":1200,"src":"\/\/www.acrdatasolutions.com\/cdn\/shop\/products\/CAL-Logger_Picture.jpg?v=1654881515"},"aspect_ratio":1.41,"height":851,"media_type":"image","src":"\/\/www.acrdatasolutions.com\/cdn\/shop\/products\/CAL-Logger_Picture.jpg?v=1654881515","width":1200},{"alt":null,"id":24665508217003,"position":2,"preview_image":{"aspect_ratio":1.415,"height":212,"width":300,"src":"\/\/www.acrdatasolutions.com\/cdn\/shop\/products\/3344_400_300_300x300_2a2c8f8d-7738-4436-ad96-899322ca0c54.jpg?v=1654881661"},"aspect_ratio":1.415,"height":212,"media_type":"image","src":"\/\/www.acrdatasolutions.com\/cdn\/shop\/products\/3344_400_300_300x300_2a2c8f8d-7738-4436-ad96-899322ca0c54.jpg?v=1654881661","width":300},{"alt":null,"id":24665509494955,"position":3,"preview_image":{"aspect_ratio":3.061,"height":98,"width":300,"src":"\/\/www.acrdatasolutions.com\/cdn\/shop\/products\/3342_400_300_300x300_842fe7b4-4d26-4806-ad43-37fd880dbcbd.jpg?v=1654881698"},"aspect_ratio":3.061,"height":98,"media_type":"image","src":"\/\/www.acrdatasolutions.com\/cdn\/shop\/products\/3342_400_300_300x300_842fe7b4-4d26-4806-ad43-37fd880dbcbd.jpg?v=1654881698","width":300}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003cp data-start=\"264\" data-end=\"529\"\u003eThe CAL Compressed Air Logger goes beyond simple pressure monitoring. By combining pressure measurement (up to 150 PSI) with three-phase current logging, it allows you to directly correlate compressor load with system demand. This makes it an invaluable tool for:\u003c\/p\u003e\n\u003cul data-start=\"531\" data-end=\"1040\"\u003e\n\u003cli data-start=\"531\" data-end=\"657\"\u003e\n\u003cp data-start=\"533\" data-end=\"657\"\u003e\u003cstrong data-start=\"533\" data-end=\"565\"\u003eEnergy Audits \u0026amp; Load Studies\u003c\/strong\u003e – Track compressor cycling and current draw to identify opportunities for energy savings.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"658\" data-end=\"781\"\u003e\n\u003cp data-start=\"660\" data-end=\"781\"\u003e\u003cstrong data-start=\"660\" data-end=\"678\"\u003eLeak Detection\u003c\/strong\u003e – Compare pressure profiles against expected current loads to uncover inefficiencies and wasted air.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"782\" data-end=\"919\"\u003e\n\u003cp data-start=\"784\" data-end=\"919\"\u003e\u003cstrong data-start=\"784\" data-end=\"810\"\u003eSystem Troubleshooting\u003c\/strong\u003e – Diagnose issues in pneumatic control systems by monitoring both supply pressure and electrical behavior.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"920\" data-end=\"1040\"\u003e\n\u003cp data-start=\"922\" data-end=\"1040\"\u003e\u003cstrong data-start=\"922\" data-end=\"950\"\u003ePerformance Benchmarking\u003c\/strong\u003e – Establish baseline data for predictive maintenance and long-term system optimization.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1042\" data-end=\"1369\"\u003eIts compact, portable design makes it ideal for service technicians, plant engineers, and energy consultants who need a reliable way to analyze compressed air systems in the field. With the included TrendReader software, data can be quickly visualized, exported, and shared to support corrective action or long-term planning.\u003c\/p\u003e\n\u003cp data-start=\"1371\" data-end=\"1712\"\u003e\u003cstrong data-start=\"1371\" data-end=\"1405\"\u003eAccessories \u0026amp; Related Products\u003c\/strong\u003e\u003cbr data-start=\"1405\" data-end=\"1408\"\u003eThe CAL Compressed Air Logger is designed to work seamlessly with AC current transducers for three-phase load studies. Clamp-on probes make it easy to capture current flow without disconnecting wiring, ensuring quick and safe installation. By pairing the logger with the right transducers, you can:\u003c\/p\u003e\n\u003cul data-start=\"1714\" data-end=\"1960\"\u003e\n\u003cli data-start=\"1714\" data-end=\"1778\"\u003e\n\u003cp data-start=\"1716\" data-end=\"1778\"\u003eMeasure compressor energy consumption across all three legs.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1779\" data-end=\"1866\"\u003e\n\u003cp data-start=\"1781\" data-end=\"1866\"\u003eIdentify imbalances between phases that may signal equipment wear or wiring issues.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1867\" data-end=\"1960\"\u003e\n\u003cp data-start=\"1869\" data-end=\"1960\"\u003eCorrelate pressure drops with electrical load to pinpoint leaks or system inefficiencies.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1962\" data-end=\"2177\"\u003eAdditional accessories such as high-pressure and flow transducers expand the CAL’s capabilities even further, giving you a complete toolkit for auditing compressed air systems and improving overall efficiency.\u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e"}