Tubular gauge glass provides a direct visual indication of liquid level in boilers, tanks, and other vessels. Made from high-quality borosilicate glass, it is designed to resist thermal shock, chemical exposure, and typical boiler room conditions. Selecting the proper gauge glass type is critical for accurate readings, safe operation, and service life.

Clear tubular gauge glass is the most common option for standard applications, offering an unobstructed view of the liquid level and fluid condition. Redline tubular gauge glass features permanent red reference lines fused into the glass to improve level visibility, especially in low-light environments or from a distance.

Heavy wall tubular gauge glass is manufactured with increased wall thickness to provide added durability and resistance to mechanical stress, making it suitable for applications where vibration or longer service life is a concern. High-pressure tubular gauge glass is engineered specifically for elevated pressure and temperature service and should be selected carefully based on system conditions and applicable codes.