FSG038-4 Sight Glass | 3/4 NPT Male Solid Brass Air Compressor Oil Level Sight Window Gauge

TEMPERATURE & PRESSURE:This high pressure sight glass and corrosion resistant sight glass supports 116.03 PSI (55 bar) max pressure and 120°C working temperature. Our air compressor sight glass as a standard sight glass indicator passes strict pressure & temperature testing before leaving the factory.
APPLICATION:This dedicated air compressor sight glass is a precise liquid level indicator designed to monitor oil level for air compressors. This oil level sight glass also fits storage tanks, pumps, piping systems, bearing housings and industrial mixers, the sight glass gauge provides clear visual inspection for oil, water and gas.
MATERIAL:This brass sight glass body is manufactured from solid brass, matched with impact-resistant tempered glass window. The boiler sight glass and air compressor sight glass both can bear continuous 116.03PSI pressure for long-time industrial operation.
THREAD PROTECTION AND DURABLE:This threaded sight glass features standard 3/4 Inch MNPT male thread. The sight gauge with 3mm thick transparent glass lets operators quickly check oil status on air compressor sight glass.
SERVICE:We carry out 100% full QC inspection on each tank sight glass and air compressor sight glass before delivery, with round-the-clock after-sales support for global buyers.
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Fanovo FSG038 solid brass sight glass is a sight plug with 3/4″ NPT male thread, specially made as air compressor sight glass for real-time visual monitoring of oil, water, and gas levels on industrial equipment. Featuring a tempered glass sight window rated for 116 PSI and 120°C, this oil level sight glass delivers stable, high-pressure resistant performance for storage tanks, air compressors, hydraulic systems, and bearing housings.

High Pressure & Corrosion Resistant Sight Glass Specifications:

Oil Level Sight Glass Application Scenarios:

This air compressor sight glass, also known as oil level sight glass, fits air compressors, hydraulic stations, storage tanks and boiler equipment for real-time liquid level monitoring. These threaded sight glass feature a clear tempered glass window; simply screw them into threaded holes on tanks, gear cases, bearing housings, and mixers to directly observe internal oil liquid status. As a reliable liquid level indicator, this brass sight glass plug passes full visual calibration test before delivery. You can install boiler sight glass on furnace side walls and fix tank sight glass on liquid tank ports for long-term stable liquid observation.
Most competing sight glass on the market use glass clamped between two metal flanges or threaded rings, which are prone to leakage under high pressure. By contrast, our high pressure sight glass avoids the defects of traditional structures, delivering easy maintenance and excellent safety performance. We also support customized safety sight glasses to match your exact equipment specifications, especially for air compressor production and supporting industrial systems.

Solid Brass Sight Glass Material & Advantages:

  • Polypropylene sight glass is lighter than metal brass sight glass, but lacks pressure resistance for air compressor equipment.
  • Bronze sight glass features higher hardness and longer service life, yet our solid brass sight glass offers better cost performance for air compressor sight glass matching.
  • Aluminum sight glass delivers basic corrosion resistance, while our brass sight glass balances corrosion resistance and threading precision for industrial oil level observation.

316 stainless steel sight glass owns top-tier anti-corrosion performance, but solid brass sight glass remains the most cost-effective choice as air compressor sight glass. This corrosion resistant sight glass fits most conventional air compressor, tank and boiler working environments without excessive cost.

How to choose different indicators Inside for custom sight glass?

An indicator moves when flow is present, so it’s easy to visually confirm flow from a distance. For dark liquid, an indication inside will be best choice to check flow from a distance.

  • Flapper indicator provides a subtle indication of flow.
  • Ball indicator shows flow more prominently than a flapper indicator for easier viewing at a distance.
  • Rotor indicator is the most obvious indicator of flow for maximum visibility.
  • Back window can be backlit to increase the visibility of dark liquids.

 

  • Size: 3/4”
  • Material: Brass
  • Medium: Oil / water
  • Connection: Male NPT
  • Max pressure: 116 PSI
  • Max Temperature: 120 degree C
  • Different Type Can be Perfectly Made by Fanovo Industries.
  • In addition to this size, we can also customize other sizes for you according to your needs.
  • If you have any other needs about this product, please feel free to contact us.

Complies with Lead Free Plumbing Laws, NSF/ ANSI 61, UPC/ CE, ISO 9001

For approval information, please refer to the products specification sheet. For any other information on product certification and documentation information, please contact Fanovo.

FANOVO STATEMENT OF WARRANTY & LIMITATION OF WARRANTY

Fanovo warrants, to our all purchasers, that its products which are delivered to its purchasers will be the kind described in the order or price list and will be free of defects in workmanship or material for a period of two year from the date of shipping to you, our purchaser.

Should any failure to conform to this warranty appear within two year after the date of the initial delivery to our purchaser, Fanovo will, upon written notification thereof and substantiation that the goods have been stored, installed, maintained and operated in accordance with Fanovo’s recommendation and standard industry practice, correct such defects by suitable repair or replacement at Fanovo’s own expense. If any valve alleged to be defective, is reported to Fanovo headquarter in China, it will be examined and, if found to be defective under the warranty, it will be replaced at no charge in future order.

THIS WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR OTHER WARRANTY OF QUALITY, WHETHER EXPRESS OR IMPLIED, EXCEPT THE WARRANTY OF TITLE AND AGAINST PATENT INFRINGEMENT Correction of non-conformities, in the manner and for the period of time provided above, shall constitute fulfillment of all liabilities of Fanovo to our purchaser, with respect to the goods, whether based on contract, negligence, strict tort or otherwise, it is the intention of Fanovo that no warranty of any kind, whether express or implied, shall pass through our purchaser to any other person or corporation.

LIMITATION OF LIABILITY: FANOVO SHALL NOT UNDER ANY CIRCUMSTANCES BE LIABLE FOR SPECIAL OR CONSEQUENTIAL DAMAGES SUCH AS, BUT NOT LIMITED TO, DAMAGES OR LOSS OF OTHER PROPERTY OR EQUIPMENT, LOSS OF PROFITS, OR REVENUE, COST OF CAPITAL, COST OF PURCHASED OR REPLACEMENT GOODS, OR CLAIMS OF CUSTOMERS OF OUR INITIAL PURCHASER. THE REMEDIES OF OUR INITIAL PURCHASER, AND ALL OTHERS, SET FORTH HEREIN ARE EXCLUSIVE, AND THE LIABILITY OF FANOVO WITH RESPECT TO SAME SHALL NOT, EXCEPT AS EXPRESSLY PROVIDED HEREIN, EXCEED THE PRICE OF GOODS UPON WHICH SUCH LIABILITY IS BASED.

Fanovo is not just innovative products—we also provide wide-ranging capabilities, including design, manufacturing, and distribution. Each of these capabilities, as well as others, can be scaled to your needs – you can use as much or as little as makes sense for your product development.

Our Strengths

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