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Coating thickness gauge by BRK with digital display, multiple buttons, and corded metal probe.
Coating thickness gauge by BRK with a black metal casing and digital display reading "150.0".
Coating thickness gauge by BRK showing a blue screen with several control buttons.
Gray coating thickness gauge by BRK, showing digital display, button functions, and dimensions.
Coating thickness gauge by BRK with a silver metallic housing showing several ports and screws.
Coating thickness gauge by BRK with digital display and probe attachment on a white geometric platform.
Coating thickness gauge by BRK displaying three measurement modes: standard, statistical, and g/m² weight.
CTN-300 Kit with case


BRK

CTN-300

CTN-300 Coating Thickness Gauge

Regular price $540.00 Sale price $600.00 Unit price per
Shipping calculated at checkout.

The BRK CTN-300 Coating Thickness Gauge is designed for versatile, high-precision measurement of coating layers on a wide range of substrates.

Ordering Notes:

  • BRK CTN-300 meter and probes are sold separately. Please select the desired probe for your specific application when purchasing this meter.
  • All BRK meters and probes ship direct from the manufacturer and require 5-10 days for shipping.

It combines both magnetic induction and eddy current measurement principles with intelligent calibration algorithms to deliver accurate, consistent results from ultra-thin decorative coatings to industrial-grade protection layers.

Compatible with an array of specialized probes, the CTN-300 handles ferrous, non-ferrous and aluminum substrates as well as complex curved surfaces such as pipes, screws and small components. Its broad measurement range and robust feature set make it suitable for manufacturing quality control, metal processing inspection, plating and anodizing verification, and corrosion protection checks in demanding industrial environments.

  • Extensive Measurement Range
    Supports coating thickness measurement from 0.003 mm (3 µm) up to 13 mm (13,000 µm), covering a wide spectrum of coating types and thicknesses.
  • Multi-Probe Compatibility
    Works with up to 13 dedicated probes including magnetic, non-magnetic, high-temperature and right-angle variants for maximum versatility.
  • Magnetic Induction & Eddy Current Technologies
    Automatically detects substrate type (ferrous or non-ferrous) and applies the correct measurement principle for accurate results.
  • High Precision & Intelligent Calibration
    Advanced sensing algorithms and automatic calibration routines provide reliable, repeatable measurements with minimal user setup.
  • Versatile Measurement Modes
    Supports single measurement, continuous scan and statistical functions (average, max, min, count, standard deviation) for flexible inspection workflows.
  • Robust Data Handling
    Built-in data storage with export capability and high/low limit alarms for quality control and reporting.
  • Portable & Field Rated
    Durable metal housing and rechargeable lithium-ion battery support extended use in workshop and field environments.

Typical Applications

  • Industrial painting and powder coating inspection
  • Plating, anodizing and surface treatment verification
  • Automotive and aerospace coating quality control
  • Marine and shipbuilding corrosion protection monitoring
  • Manufacturing and fabrication process inspection
  • General laboratory and materials research

What’s Included

  • CTN-300 gauge main unit
  • Calibration foil set
  • Carrying case
  • Charging cable
  • User manual
Measurement Principle Magnetic induction and eddy current (automatic substrate detection)
Measurement Range Up to 13 mm (13,000 µm) depending on probe configuration
Resolution 0.1 µm (all probes):contentReference[oaicite:9]{index=9}
Display Mode Numerical readout with high contrast LCD
Statistical Functions Average, Maximum, Minimum, Count, Standard Deviation:contentReference[oaicite:10]{index=10}
Operational Modes Direct measurement, Continuous scan:contentReference[oaicite:11]{index=11}
Data Storage 10 groups, 1000 readings total:contentReference[oaicite:12]{index=12}
Power Supply Rechargeable lithium-ion battery:contentReference[oaicite:13]{index=13}
Probe Connection Detachable cable (interchangeable probes):contentReference[oaicite:14]{index=14}

 

Fe Magnetic Probe Part Number: Fe Magnetic induction probe for measuring coating thickness on ferrous substrates such as steel and iron. Ideal for paint, plating and corrosion protection coatings. Fe High Temperature Probe Fe High-Temperature Probe Part Number: Fe-HT Designed for coating measurements on hot ferrous surfaces during production processes such as galvanizing and powder coating. NFe Probe NFe Eddy Current Probe Part Number: NFe Eddy current probe for coating thickness measurement on non-ferrous metals including aluminum, copper and brass. NFe High Temperature Probe NFe High-Temperature Probe Part Number: NFe-HT High-temperature eddy current probe for coating inspection on heated non-ferrous metals such as aluminum components. N400 Probe for CTN-300 Coating Thickness Gauge by BRK, featuring a silver metal finish and knurled texture. N400 Probe Part Number: N400 Precision eddy current probe designed for accurate measurement of thin coatings on non-ferrous substrates. N3 Probe N3 Probe Part Number: N3 Extended-range probe for measuring thicker coatings on aluminum and other non-magnetic substrates. F3 Magnetic Probe Part Number: F3 Magnetic probe designed for measuring thicker protective coatings on steel including epoxy and powder coatings. High-temperature probe for CTN-300 coating thickness gauge by BRK with a black head and metal ribbed cylindrical body. F3 High-Temperature Probe Part Number: F3-HT High-temperature version of the F3 probe for measuring thick coatings on heated steel components. F5 Magnetic Probe Part Number: F5 Wide-range probe designed for heavy protective coatings and thick industrial paint layers on steel. F10 Magnetic Probe Part Number: F10 Extra-wide range probe capable of measuring extremely thick coatings and insulation layers. F400 Magnetic Probe Part Number: F400

Compact magnetic probe designed for precise measurement of thin coatings on ferrous substrates such as steel and iron.

Magnetic probe for CTN-300 Coating Thickness Gauge by BRK, featuring a ribbed metal barrel and black cable. F500 Probe Part Number: F500 High-precision probe optimized for measuring thin coatings on small steel components.

 

Coating Thickness Gauges CTN-210B CTN-210C CTN-230 CTN-300 BT-T7 BT-T7A
Type / Principle Magnetic induction & eddy current coating gauge Magnetic induction & eddy current coating gauge

Magnetic induction & eddy current coating gauge.               

Magnetic induction & eddy current coating gauge, multi-probe system Through-coating ultrasonic thickness gauge Through-coating ultrasonic thickness gauge
Measurement Range Probe dependent, up to 0–10,000 μm Probe dependent, micron to millimeter range ypically up to ~1250 µm Probe dependent, up to 13 mm (13,000 μm) depending on probe 0.7–500 mm (standard mode, steel) 0.7–350 mm (standard mode, steel)
Through-Coating Capability Measures coating thickness only Measures coating thickness only Measures coating thickness only Measures coating thickness only Measures substrate thickness through coatings up to 5 mm Measures substrate thickness through coatings up to 3 mm
Resolution 0.1–1 μm depending on probe 0.1–1 μm depending on probe Up to 0.1 µm depending on probe Up to 0.1 μm depending on probe 0.01 mm 0.01 mm
Accuracy Typically ±(2%H + 1 μm) after calibration Typically ±(1%H + 1 μm) after calibration Approx. ±(1–3%) after calibration Probe dependent, industrial QC grade ±(0.6%H + 0.05) mm ±(0.6%H + 0.1) mm
Probe Support Multiple interchangeable probes Multiple interchangeable probes Multiple interchangeable probes Multiple interchangeable probes Standard, micro, coarse and high-temp probes Standard, micro, coarse and high-temp probes
Data Handling Group storage with PC export Internal memory with USB/RS232 export Group storage with PC export Data storage with statistical functions Standard thickness readout Standard thickness readout
Power Supply Rechargeable lithium battery Rechargeable battery AA Batteries Rechargeable lithium-ion battery Rechargeable Li-ion battery, 160+ hrs typical AA batteries, 50+ hrs typical
Primary Use Case Industrial coating thickness measurement Advanced coating inspection with data functions Industrial coating thickness measurement High-end multi-probe coating inspection Substrate thickness through coatings Substrate thickness through coatings, mid-range


Shipping Weight: 5.0 lb

Product Type: Coating Thickness Gauge

Product Category: Measuring Tools & Sensors


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