Zight
Product category
Borosilicate Tubular Gauge Glass
Manufactured in 3.3 Borosilicate Glass, these level gauge glass tubes are used in several applications where a good chemical resistance and low thermal expansion coefficient are required. Outside diameters range from 1/2" to 1-1/2", with tube lengths from 1" to 144". Ends are cut with diamond equipment to assure sealing and avoid sharp edges.
ZIGHT BOROSILICATE TUBES are available in different wall thicknesses according to customer specifications, in both Red Line and Transparent. The Red Line tube uses a special treatment (two white lines and one red line) that magnifies fluid level for quick, distant inspection. Need additional assistance? Contact us.
Below are the most common O.D. and length variants along with their pressure resistance under low-temperature and high-temperature (steam service) operating conditions.
Dimensions
| Dimension | Minimum | Maximum |
|---|---|---|
| Outside Diameter | 3/16" | 1-1/2" |
| Wall Thickness | 3/64" | 1/2" |
| Length | 1" | 145" |
Operating pressure
| Outside Diameter | Wall Thickness | Length | Low temp. up to 90°C | Steam 100°C–200°C |
|---|---|---|---|---|
| 5/8" | 7/32" | 12" | 600 PSI | 350 PSI |
| 5/8" | 7/32" | 24" | 550 PSI | 300 PSI |
| 5/8" | 7/32" | 36" | 500 PSI | 220 PSI |
| 5/8" | 7/32" | 48" | 350 PSI | 150 PSI |
| 5/8" | 1/8" | 12" | 400 PSI | 300 PSI |
| 5/8" | 1/8" | 24" | 315 PSI | 250 PSI |
| 3/4" | 1/4" | 12" | 600 PSI | 350 PSI |
| 3/4" | 1/4" | 24" | 550 PSI | 350 PSI |
| 3/4" | 1/4" | 36" | 500 PSI | 220 PSI |
| 1" | 1/4" | 12" | 600 PSI | 350 PSI |
Maximum pressure depends on outside diameter, wall thickness (standard, high-pressure, or heavy wall), and tube length. Contact Zight to confirm ratings for your application.
Products
Showing 10 products
Zight
Borosilicate Tubes High Pressure 5/8" Transparent Gauge Glass
Zight
Gauge Glass Standard Wall 5/8" Red Line Tube
Zight
Tubular Level Gauge Glass Heavy Wall, 3/4" Redline Tube
Zight
Tubular Level Gauge Glass Heavy Wall, 3/4" Transparent Tube
Zight
Tubular Level Gauge Glass Heavy Wall, 5/8" Redline Tube
Zight
Tubular Level Gauge Glass Heavy Wall, 5/8" Transparent Tube
Zight
Tubular Level Gauge Glass High Pressure, 3/4" Redline Tube
Zight
Tubular Level Gauge Glass High Pressure 3/4" Transparent Tube
Zight
Level Gauge Standard Wall 5/8" Transparent Glass Tube
Frequently asked questions
What is Borosilicate Tubular Gauge Glass used for?
It is commonly used to monitor liquid levels in tanks, boilers, and pressure vessels. High resistance to thermal shock and chemical corrosion makes it ideal where durability and reliability are crucial.
Is it suitable for high-pressure applications?
Yes. Maximum pressure resistance depends on outside diameter, wall thickness, and tube length. Contact a Zight representative to match glass to your application.
How should it be installed?
Use appropriate gaskets and hardware to prevent uneven stress. Secure firmly without over-tightening. Refer to Zight installation guidance for your valve and gauge configuration.
Can it be used with any fluid?
Borosilicate resists most acids, alkalis, and solvents. It is not suitable for hydrofluoric acid (HF), which attacks the silica structure of the glass.
Need sizing, pressure ratings, or a quote?
Our team can recommend the right glass and hardware for your application.
Contact Zight