Dual Metric & Imperial Capillary Tube Gauge | HVAC Steel Tool

Dual-Marked Capillary Tube Gauge – Metric & Imperial | Stainless Steel

Meet the professional-grade Capillary Tube Gauge built for HVAC technicians, hydraulic engineers, plumbers, and industrial mechanics. This precision stainless steel tool features both metric and imperial scales on a single instrument — so you can measure copper and capillary tube diameters accurately without ever needing a conversion chart.

Key Features

• Quick-Read Double-Jaw Design: Precision scale with a dual-jaw configuration for fast, accurate measurement of copper and capillary tubes during HVAC installation and pipe inspection — saving time and boosting efficiency on every job.
• No Conversion Required: The metric/imperial dual-scale display lets you work seamlessly across global engineering standards. Perfect for international projects and cross-border maintenance work where both measurement systems may be in use.
• Multi-Size Step Drill Fit: Step-drilled slots support a wide variety of tube dimensions, making this gauge compatible with refrigeration systems, plumbing projects, pneumatic lines, and hydraulic applications.
• Dual-Sided Wall Thickness Inspection: Symmetrical groove flange design delivers accurate inner-outer gap readings, minimising cutting errors and ensuring consistent wall thickness checks during metalworking tasks.
• Built to Last: Constructed from heavy-duty stainless steel with long-term scale clarity, this tool is engineered for repeated, reliable use in workshops, construction sites, and demanding industrial environments.

Product Specifications

• Product Name: Capillary Tube Gauge
• Material: Stainless Steel
• Certifications: RoHS, WEEE
• Dimensions: Approx. 14.3 × 3.9 cm / 5.63 × 1.54 inches
• Weight: Approx. 65 g
• Scale: Metric & Imperial (dual-marked)
• Country of Origin: Made in Mainland China

What's in the Box?

• 1 × Capillary Tube Gauge (Stainless Steel)

Who Is This For?

This capillary tube gauge is ideal for HVAC technicians, refrigeration engineers, hydraulic and pneumatic system mechanics, plumbers, and industrial maintenance professionals. Whether you're fitting pipes in a new system or troubleshooting an existing one, the dual-scale design eliminates guesswork and keeps your workflow moving.

Related Tools You May Also Need

• 0.38mm Fine Nib Calligraphy Fountain Pen | Gold Trim Gift — for precision marking and labelling on the job
• 1-Inch Round Dot Label Stickers – 500/Roll, 10 Colors — perfect for colour-coding pipes and fittings

Safety & Standards Reference

For guidelines on safe tool use in industrial and workshop environments, refer to the OSHA Hand & Power Tools Safety Standards.

Note: Due to different lighting and screen settings, the item colour may slightly vary from the picture. Due to manual measurement tolerances, please allow a 1–2 cm difference in stated dimensions.

Frequently Asked Questions

Q: What types of tubes can this capillary tube gauge measure?

A: This gauge is designed to measure capillary and copper tubes commonly used in HVAC systems, refrigeration units, hydraulic lines, and pneumatic systems. The step-drilled design accommodates multiple tube dimensions, making it versatile for a wide range of industrial and professional applications.

Q: Does the gauge support both metric and imperial measurements?

A: Yes. The dual-marked scale displays both metric and imperial units simultaneously, so there is no need for manual conversion. This makes it particularly useful for professionals working on international projects or servicing equipment built to different measurement standards.

Q: Is this tool durable enough for daily workshop use?

A: Absolutely. The gauge is constructed from stainless steel with a sturdy metal body and permanently etched scale markings designed for long-term clarity. It is built to withstand repeated use in demanding environments such as workshops, construction sites, and refrigeration service settings.

Q: What does the dual-sided inspection feature mean?

A: The dual-sided inspection refers to the symmetrical groove flange design, which allows you to measure both the inner and outer diameters (or wall thickness) of a tube in a single tool. This reduces the need for multiple gauges and helps minimise cutting and fitting errors during metalworking tasks.