What is the AWO2 hydraulic oil level sight glass's maximum operating pressure and temperature range?

The AWO2 hydraulic oil level sight glass has a maximum operating pressure of 5 bar and an operating temperature range from â20Â°C to +100Â°C.

How do I install the AWO2 hydraulic oil level sight glass on the tank side wall?

To install the AWO2 hydraulic oil level sight glass on the tank side wall: 1. Drill or prepare a circular inspection opening in the tank side wall with diameter D (match D to the AWO2 model). 2. Clean the cut edge and surrounding area; ensure no burrs and the surface is flat. 3. Place the guarnital (fiber) washer onto the AWO2 body so the washer seals against the tank wall. 4. Insert the AWO2 body through the tank opening from the outside (or as specified by manufacturer orientation) so the polycarbonate inspection window faces outward and the aluminum body aligns flush with the wall. 5. Secure and tighten the mounting hardware evenly to compress the fiber washer, ensuring a uniform seal. Do not overtighten to avoid damaging the polycarbonate window. 6. Verify installation is pressure-capable (max 5 bar) and rated for -20Â°C to +100Â°C. Inspect for leaks before returning the tank to service.

Can the AWO2 hydraulic oil level sight glass be used with fluids other than hydraulic oil (e.g., glycol or water-glycol)?

The AWO2 hydraulic oil level sight glass is specifically described as an inspection gauge designed for monitoring hydraulic oil level. Its constructionâaluminum body, polycarbonate viewing element, and guarnital (fiber) washerâand specified limits (maximum operating pressure 5 bar; temperature range â20 Â°C to +100 Â°C) reflect materials and ratings chosen for typical hydraulic oils. Using the AWO2 with fluids other than hydraulic oil (for example glycol or waterâglycol) is not recommended unless the compatibility of all materials with the alternative fluid is confirmed. Key considerations: - Chemical compatibility: Polycarbonate can be attacked, crazed or swollen by some glycol formulations, additives or solvents; the fiber washer may absorb or degrade with water-containing fluids; aluminum can corrode in water/glycol mixtures without proper inhibitors. - Temperature and pressure: The stated operating temperature and 5 bar pressure limit must not be exceeded by the alternative fluidâs application. - Safety and longevity: Water-containing fluids promote corrosion and microbial growth, which can compromise sealing and visibility over time. If you must use a different fluid, verify chemical compatibility of polycarbonate, aluminum and the washer material with the specific glycol or waterâglycol formulation (including additives and corrosion inhibitors) and ensure operating conditions stay within the stated limits. When in doubt, consult the AWO2 manufacturer or select a sight glass explicitly rated and specified for the intended fluid.

AWO2 hydraulic oil level sight glass

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Additional information

Material	AL – aluminum

Inspection gauge designed for monitoring hydraulic oil level, mounted on the side wall of the tank. Diameter D [mm] – size of the inspection opening. Material: aluminum (body), polycarbonate (inspection opening), guarnital (fiber washer). Maximum operating pressure: 5 bar. Operating temperature: from -20°C to +100°C.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
AH-AWO2-04G	Oil gauge, GZ 1/4" BSP	-	-	In stock	Enquiry
AH-AWO2-06G	Oil gauge, GZ 3/8" BSP	-	-	In stock	Enquiry
AH-AWO2-08G	Oil gauge, GZ 1/2" BSP	-	-	In stock	Enquiry
AH-AWO2-12G	Oil gauge, GZ 3/4" BSP	-	-	In stock	Enquiry
AH-AWO2-16G	Oil gauge, GZ 1" BSP	-	-	In stock	Enquiry
AH-AWO2-20G	Oil gauge, GZ 1.1/4" BSP	-	-	In stock	Enquiry
AH-AWO2-24G	Oil gauge, GZ 1.1/2" BSP	-	-	In stock	Enquiry
AH-AWO2-32G	Oil gauge, GZ 2" BSP	-	-	In stock	Enquiry
AH-AWO2-M14	Oil gauge, M14x1.5	-	-	In stock	Enquiry
AH-AWO2-M16	Oil gauge, M16x1.5	-	-	In stock	Enquiry
AH-AWO2-M18	Oil gauge, M18x1.5	-	-	In stock	Enquiry
AH-AWO2-M20	Oil gauge, M20x1.5	-	-	In stock	Enquiry
AH-AWO2-M22	Oil gauge, M22x1.5	-	-	In stock	Enquiry
AH-AWO2-M24	Oil gauge, M24x1.5	-	-	In stock	Enquiry
AH-AWO2-M27	Oil gauge, M27x1.5	-	-	In stock	Enquiry
AH-AWO2-M30	Oil gauge, M30x1.5	-	-	In stock	Enquiry
AH-AWO2-M33	Oil gauge, M33x1.5	-	-	In stock	Enquiry

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Inspection gauge designed for monitoring hydraulic oil level, mounted on the side wall of the tank. Diameter D [mm] – size of the inspection opening. Material: aluminum (body), polycarbonate (inspection opening), guarnital (fiber washer). Maximum operating pressure: 5 bar. Operating temperature: from -20°C to +100°C.