The Esco Oil Sight Glass

The original Esco Oil Sight Glass handles most applications

The Esco Oil Sight Glass (OSG) is the model that started the product line over 30 years ago. Water wreaks havoc on lubrication systems, causing premature wear. With the OSG, users have an immediate visual inspection of the oil and the ability to drain any accumulated water. The OSG is installed directly to a drain port located at the bottom of a reservoir or with an elbow for drain ports located on the side of the equipment. The spring loaded drain valve is utilized to drain off any water contamination. Any sediment or particles in the lubricating fluid will matriculate to the OSG where, upon inspection, the user can determine the appropriate action. Available in 1 ounce or 3 ounce capacity with fitting sizes of 1/4”, 3/8” or 1/2” NPT, the Esco Oil Sight glass is made of strong, impact and stain resistant acrylic and brass hardware*. The pressure and temperature ratings handle most operating environments.

Part No.	NPT SIZE	Bottle Size	OD	Length	Max Temp	Max PSI
OSG1X250	1/4”	1 oz.	1.75”	4”	230° F	265#
OSG1X375	3/8”	1 oz.	1.75”	4”	230° F	265#
OSG1X500	1/2”	1 oz.	1.75”	4”	230° F	265#
OSG3X250	1/4”	3 oz.	2.50”	4”	230° F	265#
OSG3X375	3/8”	3 oz.	2.50”	4”	230° F	265#
OSG3X500	1/2”	3 oz.	2.50”	4”	230° F	265#