Best Use: High-pressure boilers and vessels requiring clear night-time monitoring[cite: 647].
Performance: Uses high-purity quartz tubes with bi-color (Red/Green) technology. Liquid shows green, and gas shows red[cite: 648].
Benefit: Superior Visibility through distinct color contrast for low-light environments[cite: 649].

Best Use: Standard industrial tanks, towers, and troughs[cite: 651].
Performance: Robust metal body with toughened glass. Includes safety steel balls that automatically seal flow if glass breaks[cite: 652, 653].
Benefit: Safety First design prevents hazardous leaks during accidental damage.

Best Use: Steam boilers and high-temperature pressure containers[cite: 656].
Performance: Available in single-color or bi-color versions with a simplified structure for reliable sealing[cite: 657, 658].
Benefit: Reliable Steam Monitoring built for rapid temperature shifts in boiler operations[cite: 659].

Best Use: High-pressure steam drums (up to 32MPa) and critical power plant boilers.
Performance: Mica-protected window with advanced optical paths. Available in “No Blind Zone” versions[cite: 662].
Benefit: Extreme Pressure Rating. Mica sheets prevent steam corrosion, significantly extending service life.