1/4 inch Copper Sight Window 3/8 brass Sight Glass Gauge 1/2 inch Oil Liquid Level Gauge 3/4 Sight Glass window 1 inch Sight plug with contrast reflector

OEM-Ready Specifications & Customization
As a dedicated oil brass sight glass supplier, we offer full adaptability to meet your specific engineering requirements.

Body Material: Solid Brass with an integrated Steel Contrast Screen
Window: High-Strength Tempered Glass
Sealing Options: FKM (Viton®) Seal, HNBR, or Copper Sealing Ring for wide chemical compatibility
Pressure Rating: Up to 1500 PSI (100 Bar), dependent on type
Temperature Range: -10°C to +350°C (+14°F to +662°F)
Thread Standards: NPT, BSP, and Metric (M thread) available upon request.
Exclusive Contrast Reflector for All-scene Visibility: Built-in contrast reflector delivers instant remote oil level reading, cutting inspection time for compressors, gearboxes and bearing housings.
Extreme High Pressure & Temperature Resistance: H59 brass body + fused tempered glass withstands 100 Bar / 1500 PSI & -10°C to 350°C, preventing leakage and glass breakage under harsh operating conditions.
Full OEM Customization Support: Custom threads, multiple sealing gaskets and laser branding available for OEM mass orders & MRO aftermarket supply.

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The innovative brass sight glass design made the strong tightening torque by hexagonal. Additionally, the field of view is increased by 10 %. And the safety is also increased by using a thicker glass.

Copper Sight Glass Print

Articledi(mm)D(mm)s(mm)I(mm)p max(bar)Cs max(Nm)Weight(g)
FSG140BG 1/47181516.5101411
FSG140BG 3/87221917101917
FSG140BG 1/29262220102729
FSG140BG 3/49322720104340
FSG140BG 111393424106972
FSG140BG 1-1/41149412510125100

REMARKS: NPT and BSP ON REQUEST. 

 

The Brass H59-1 Sight Window are suitable for use on pressurized oil tanks, air compressor, auto water tank and piping system, automotive industries, lab equipments, bearing housing and mixers, heating systems pumps and turbines.These sight glass have a body made of copper, natural or tempered  glass sight window, and an optional reflector of heat resistant techno polymer plastic or metal. The inline bronze sight glasses are highly stable and scratch proof. The fluid H59 Brass sight glass are sealed with an O-ring on the periphery and not on the face edge of the glass, so leak tightness is therefore not affected by axial pressures.

 

HOT SELLING RECOMMENDATIONS

FSG037-2 3/4” NPT Stainless Steel Oil Sight Glass with Ball Indicator for Water and Oil Hydraulic Tank Sight Glass

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

FGM-HDN12 1/2″ NPT Thread Brass Domed Hexagon Oil Level Sight Glass Natural Glass Sight Window

 

Articledi(mm)D(mm)s(mm)I(mm)p max(bar)Cs max(Nm)Weight(g)
FSG140BG 1/47181516.5101411
FSG140BG 3/87221917101917
FSG140BG 1/29262220102729
FSG140BG 3/49322720104340
FSG140BG 111393424106972
FSG140BG 1-1/41149412510125100

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

  • Design/Prototyping
  • Manufacturing & Assembly
  • Custom Labeling & Packaging
  • Inventory Management
  • Continuous Improvement & Refinement

If you’re looking for an established, financially secure partner who offers robust quality systems, validated processes, continuous improvement strategies, and a proven track record, you’ve come to the right place. Contact us and we will show you the major breakthroughs OEMs have experienced with us.

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