Mallard – 3520 Liquid Level Gauge (Sight Glass)
The Mallard Model 3520 glass liquid level gauge is a rugged flat glass gauge. Standard construction includes a solid one-piece chamber, steel covers, alloy steel bolts and nuts, and tempered glass.
Mallard – 3520 Liquid Level Gauge – Data Sheet
DownloadTechnical specifications
Connections:
1/2″ Top-bottom (standard); 3/4″ Top-bottom (optional)
Gauge length:
Gauge sections are available in nine standard glass sizes.