2 Hole & Channel vs. Full Slot
![fig7_5](https://www.infernomfg.com/wp-content/uploads/2020/07/fig7_5.gif)
Full Slot
![fig7_6](https://www.infernomfg.com/wp-content/uploads/2020/07/fig7_6.gif)
The FULL SLOT style welding pad allows maximum communication of the liquidbetween the Vessel and the Weld Pad Gage.
Full Slot style with transparent glass is recommended to see a liquid-liquid interface.
Back lighting is possible when a pair of Full Slot Gages are set 180° apart on thevessel using transparent (plain) glass.
Transparent glass is usually specified with Full Slot style but Reflex glass may alsobe used.
Specify TWA for transparent glass; RWA for reflex glass.
2 Hole & Channel
![fig7_7](https://www.infernomfg.com/wp-content/uploads/2020/07/fig7_7.gif)
![fig7_8](https://www.infernomfg.com/wp-content/uploads/2020/07/fig7_8.gif)
The Vessel is frequently not slotted to match the windows in the Pad but only drilled.In such cases a 2-HOLE & CHANNEL pad can be used with no loss of fluid flow.
Advantages are a stronger installation with more reinforcement.
Commonly used with Reflex style glass.