Product
Tubular Level Vials
Tubular level vials in glass and acrylic, available in straight, curved, cylindrical and rectangular block designs for tools, instruments and OEM applications.
Technical Specifications
| Product Type | Spirit Level Vial |
|---|---|
| Material | Glass or Acrylic (PMMA) |
| Shape | Straight, Curved, Cylindrical or Rectangular |
| Liquid Color | Yellow-green, Green, Blue, Red or Custom |
| Customization | Size, sensitivity, bubble length, markings, liquid color and mounting features |
- Glass and acrylic level vials are available.
- Multiple shapes, sizes and sensitivities are available.
- Liquid color, markings and packaging can be customized.
Level Vials
Product Description
Tubular level vials are compact bubble-level components used to determine whether a surface, tool or piece of equipment is horizontal, vertical or positioned at a specified angle.
Each vial has a calibrated internal curved surface and is partially filled with liquid, leaving a visible bubble. When the vial is level, the bubble moves to the highest point and rests between the reference lines. The internal curvature and graduation spacing determine the sensitivity of the vial.
KUNYO supplies glass and acrylic level vials in straight tubular, arc-bent, cylindrical and rectangular block configurations. Typical applications include spirit levels, measuring tools, laser instruments, surveying equipment, camera tripods, machine tools, electronic balances, household equipment and OEM leveling devices.
Available Types
Glass tubular level vials offer high transparency, stable dimensions and smooth bubble movement. They are available in straight or arc-bent forms, with or without end tips.
Acrylic cylindrical level vials are manufactured from transparent PMMA. They are lightweight, impact-resistant and economical, making them suitable for spirit levels, hand tools, appliances and high-volume OEM production.
The straight cylindrical exterior allows the vial to be easily embedded, bonded or press-fitted into a tool body or mounting base.
Curved tubular level vials, also called arc-bent level vials, have a visibly curved or banana-shaped body. The bubble naturally moves toward the highest point of the curve, providing clear and responsive level indication.
They are commonly used in precision levels, surveying instruments, machine tools and equipment requiring a defined measuring direction.
Acrylic block level vials have a rectangular or square-section body with an internal barrel-shaped chamber. Their flat exterior surfaces provide a stable mounting base and make alignment and assembly easier.
Block vials can be used for horizontal or vertical indication and are suitable for measuring tools, household products, picture-hanging tools and OEM equipment.
Keychain Block Level Vials
Keychain block level vials combine a compact acrylic rectangular vial with a key ring or hanging hole. They are lightweight, portable and suitable for quick level checks, tool accessories, promotional gifts and branded products.
Logo printing, customized body colors, liquid colors and individual packaging are available upon request. Keychain models are intended for convenient general checks rather than high-precision measurement.
Sizes
Standard and custom sizes are available for cylindrical tubular vials and rectangular block vials. Dimensions, sensitivity, bubble length, reference lines and liquid color can be customized.
Cylindrical Tubular Vials
| Outside Diameter ØD | Available Lengths L |
| 4.5 mm | 12 mm |
| 5 mm | 12, 13 mm |
| 6 mm | 15, 20, 24 mm |
| 6.3 mm | 29 mm |
| 6.5 mm | 18, 25.5 mm |
| 7 mm | 16, 18, 26, 35 mm |
| 8 mm | 20, 22, 22.5 mm |
| 9 mm | 25, 30, 35 mm |
| 10 mm | 30, 35, 40 mm |
| 12 mm | 30, 40, 50 mm |
| 15–16 mm | Custom lengths |
Typical size range:
Outside diameter: 4.5–16 mm
Overall length: 12–50 mm
Longer glass tubular vials up to approximately 100 mm are available upon request.
These dimensions apply mainly to straight acrylic and glass tubular vials. Arc-bent glass vials can be manufactured according to the required length, diameter, curvature and sensitivity.
Rectangular Block Vials
| Body Width W | Body Height H | Overall Length L | Typical Design |
|---|---|---|---|
| 8 mm | 8 mm | 25 mm | Mini block vial |
| 10 mm | 10 mm | 29 mm | Standard block vial |
| 10 mm | 10 mm | 39 mm | Extended block vial |
| 12 mm | 12 mm | 30 mm | General-purpose block vial |
| 15 mm | 15 mm | 40 mm | Large block vial |
| 15 mm | 15 mm | 40 mm | Keychain block vial |
| Custom | Custom | Custom | OEM block vial |
Rectangular block vials are available with flat ends, mounting holes, screw holes, adhesive backing, key rings or customized mounting features.
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KUNYO Industrial Components Co.,Ltd.
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No. 555 Longxing Road, High-tech Zone, Hengshui City, Hebei Province, China 053000
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