We have compiled a list of manufacturers, distributors, product information, reference prices, and rankings for Sight glass.
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Sight glass Product List and Ranking from 22 Manufacturers, Suppliers and Companies

Last Updated： Aggregation Period:Dec 17, 2025～Jan 13, 2026
This ranking is based on the number of page views on our site.

Sight glass Manufacturer, Suppliers and Company Rankings

Last Updated： Aggregation Period:Dec 17, 2025～Jan 13, 2026
This ranking is based on the number of page views on our site.

  1. 日本クリンゲージ 東京営業所 Tokyo//Industrial Machinery
  2. 三広アステック Tokyo//Industrial Machinery
  3. サワダ製作所 Hyogo//Other manufacturing
  4. 4 スリーエム工業 本社、東京営業所 Osaka//Manufacturing and processing contract
  5. 5 MONOVATE(旧：日東金属工業) 八潮工場 Saitama//Industrial Machinery
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Sight glass Product ranking

Last Updated： Aggregation Period:Dec 17, 2025～Jan 13, 2026
This ranking is based on the number of page views on our site.

  1. Site glass lantern type スリーエム工業 本社、東京営業所
  2. Integrated sight glass (peephole) SGP 三広アステック
  3. Type 101 Cross Sight Glass (Without Nozzle) ヴイ・アイ・シー
  4. Reflective liquid level gauge (water level gauge) 日本クリンゲージ 東京営業所
  5. 5 Round Glass Tube Water Level Gauge (Tubular Type) KGV-N Model サワダ製作所

Sight glass Product List

31～45 item / All 64 items

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Yoshitake sight glass

Yoshitake sight glass

Can be mounted horizontally or vertically.

Introducing our "Yoshitake Sight Glass." 【Features】 The interior of the dome is self-cleaning due to the rotation of the spinner, eliminating the need for dome cleaning. You can check the flow rate changes based on the spinner's rotation speed. Installation can be done either horizontally or vertically. 【Product Numbers】 400-10 400-15 400-20 400-25 *Available for purchase on "Plant Navi," a wholesale and procurement site exclusively for businesses dealing with plant piping materials and residential equipment operated by Hasegawa Kizai Co., Ltd.

  • valve

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Electrode-type liquid level gauge (SRV - Stepload Vision)

Electrode-type liquid level gauge (SRV - Stepload Vision)

The only domestic electrode-type liquid level gauge manufacturer in Japan.

It is the only domestic electrode-type liquid level gauge made by a domestic manufacturer. The electrode plug sensor detects the electrical resistance values of water and water vapor, measures the liquid level, and displays it remotely. It has a 4-20 mA output, providing signal output to alarm devices and control systems. It is mainly used for boiler drums in thermal power plants.

  • Other measurement, recording and measuring instruments

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Integrated sight glass (peephole) SGP

Integrated sight glass (peephole) SGP

A built-in peephole that safely secures glass between the window frame and the upper lid with bolts for installation and removal on a stainless steel container.

It is an integrated peephole that is fixed with bolts between the glass and the window frame and upper cover. It is easy to handle and there is no risk of glass breakage due to falling off. The body material is made of SUS316L as standard.

  • Stainless steel container

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Wiper-equipped sight glass (peephole) SG-W

Wiper-equipped sight glass (peephole) SG-W

Wiper-equipped sight glass (peephole) with a wiper for removing fog on the inside of the window glass.

This is a peephole with a wiper installed on the inner side of the site glass SG window to remove fog. The window glass comes standard with Tempax reinforcement, and Tempax can also be selected. Additionally, if the wiper is installed eccentrically, Tempax will be used. By using it in conjunction with a tank light or flashlight holder, visibility inside the container is improved.

  • Stainless steel container

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Wiper-equipped integrated sight glass (peephole) SGP-W

Wiper-equipped integrated sight glass (peephole) SGP-W

Wiper-equipped integrated sight glass (peephole) with a wiper for removing fog from the inside of the window glass.

This is a peephole with a wiper attached to the inside of the SG site glass to remove fog from the window glass. The window glass is standard tempered glass, but tempered options are also available. Additionally, if the wiper is installed eccentrically, tempered glass will be used. Using it in conjunction with a tank light or flashlight holder improves visibility inside the container.

  • Stainless steel container

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Transparent liquid level gauge (water level gauge)

Transparent liquid level gauge (water level gauge)

Armored type level gauge (water level gauge)

Direct measurement of the liquid level with glass allows for reliable liquid level management. We can manufacture the installation length and shape (flange, threaded, etc.) according to your specifications.

  • Electrical Instruments/Electrometers
  • Instrumentation and Control Systems
  • Piping Materials

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Glass - Metal Ring Fusion Site Glass Clinport

Glass - Metal Ring Fusion Site Glass Clinport

Metal ring fused sight glass Cleanport

Unlike regular tempered glass, it is reinforced by a unique fusion technology, allowing for safer monitoring of tanks and piping.

  • Other process controls
  • Other machine elements
  • Piping Materials

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Fluororesin PFA Coated Glass Clear Coat Glass(R)

Fluororesin PFA Coated Glass Clear Coat Glass(R)

It has excellent non-stick properties, water repellency, chemical resistance, heat resistance, and safety.

Clear Coat Glass® is a coating that has been firmly bonded to the surface of glass using advanced technology from Nihon Clingage Co., Ltd., with a fluororesin (PFA). Since it is coated with fluororesin (PFA), it possesses the chemical resistance of fluororesin (PFA). The PFA film has slight permeability, so if chemical resistance is the goal, it is necessary to coat it with a thicker film. Additionally, the surface coated with fluororesin (PFA) repels water and is not stained by oil. It has properties that prevent most substances from adhering, so the surface remains mostly clean. Even if it does get dirty, it can be easily cleaned. For more details, please contact us or refer to the catalog.

  • Glassware and containers
  • Glass

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Round Glass Tube Water Level Gauge (Tubular Type) KGV-N Model

Round Glass Tube Water Level Gauge (Tubular Type) KGV-N Model

Limited to SCS13 manufactured flange connections! A versatile liquid level gauge with comprehensive accident prevention measures!

The "Round Glass Tube Type Water and Liquid Level Gauge (Tubular Type) KGV-N Model" is a low-cost liquid level gauge with a simple structure using a gauge tube, limited to flange connections made of SCS13. It is a versatile liquid level gauge with comprehensive accident prevention measures (compliant with fire safety regulations). All models are compatible with protective tubes. 【Features】 ■ Check balls are installed at the top and bottom to prevent fluid leakage in case of gauge tube breakage. ■ The gauge tube is available in hard glass, Pyrex glass, and resin tube options. ■ Flange connection types can be selected from various standards and diameters. *For more details, please refer to the PDF materials or feel free to contact us.

  • Other measurement, recording and measuring instruments

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Round Type Welded Liquid Level Gauge

Round Type Welded Liquid Level Gauge

Direct monitoring of the inside of tanks and containers! High reliability against liquid and fluid leaks!

The "Round Welded Liquid Level Gauge" is a circular liquid level gauge that can be welded to various tanks and pressure vessels, allowing for direct monitoring of the interior. Additionally, due to its design, the only packing connection point is at the gauge glass section, making it a highly reliable liquid level gauge against liquid or fluid leaks. 【Features】 ■ Direct monitoring of liquid and fluid levels in the tank without time delay ■ Extremely high reliability and safety against liquid and fluid leaks ■ Compatible with solidifying liquids and high-viscosity fluids ■ Easy cleaning with flange connection ■ Wide visibility allows for monitoring inside the tank and can also be used as a light inlet ■ Contact surfaces can be processed to R shape according to the mounting part *For more details, please refer to the PDF document or feel free to contact us.

  • Other measurement, recording and measuring instruments

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LED light-equipped sight glass with adjustable irradiation angle [NMB-LA]

LED light-equipped sight glass with adjustable irradiation angle [NMB-LA]

A stainless steel peephole that prevents the glass from falling out when removed from the door, now made even easier to see with an added flashlight.

- By attaching it to the container's rules, you can check the internal condition of the container. - The low-heat, high-brightness LED light brightly illuminates the inside of the container. - The light is battery-operated and can be attached to the window, eliminating the need to carry it around or use a power cord. - The angle of the light can be adjusted to direct it to the desired position. - It is safe because the glass does not fall off when removing the window from the rules. - The liquid contact parts are made of SUS316L, which has excellent corrosion resistance. - The inner surface is tapered to maximize the field of view.

  • NMB-LA_02-1.jpg
  • NMB-LA_03-1.jpg
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  • Stainless steel utensils and containers

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[UNIBLOC Corporation] Sanitary Sight Glass_Catalog

[UNIBLOC Corporation] Sanitary Sight Glass_Catalog

Pharmaceutical-grade sanitary sight glass! Perfect for observing the flow of fluids in piping for pharmaceuticals, biotechnology, chemicals, and food lines!

The "sanitary sight glass manufactured by UNIBLOC" is sold in the United States and Europe. Due to its pharmaceutical-grade high durability, it is ideal for processes ranging from low pressure to high pressure. It can be used in pharmaceutical, biotechnology, chemical, and food and beverage processes. 【Features】 - SUS316L - O-ring: EPDM, silicone, or Viton (USP Class VI) - Polishing and electropolishing up to 15 Ra - Hastelloy C material (optional) - Standard: borosilicate glass (Pyrex) Acrylic glass (optional) For more details, please refer to the catalog or feel free to contact us.

  • bulls-eye-1.png
  • in-line-1.png
  • Pipe Fittings

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Glass liquid level gauge

Glass liquid level gauge

It is possible to directly check the liquid level in the tank from the glass!

Semco Co., Ltd. offers "glass-type level gauges." You can directly check the liquid level inside the tank through the glass. Additionally, our company has been involved in liquid level detection and control for many years. With the technology and know-how cultivated through experience, we would like to assist various customers in solving their challenges. *For more details, please refer to the external link page or feel free to contact us.

  • Other measurement, recording and measuring instruments

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Sight Glass Technical Guidebook

Sight Glass Technical Guidebook

A technical guidebook for optimal use of the sight glass!

The "Sight Glass Technical Guidebook" is a product catalog from Yoshitake Co., Ltd., which manufactures valves that control fluids flowing through pipes. It includes products such as "SL-1S, SL-1F," which allow for the confirmation of the mixing state and color of two-component fluids, as well as "SF-1S, SF-1F" and "SB-1S, SB-1F." [Contents (Excerpt)] ■ Types of sight glasses and their main applications ■ Guidelines for installing sight glasses ■ SL-1S, SL-1F ■ SF-1S, SF-1F ■ SB-1S, SB-1F *For more details, please refer to the catalog or feel free to contact us.

  • valve
  • Other machine elements

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Tubular Tank Gauge "TUG Type" *No power supply required

Tubular Tank Gauge "TUG Type" *No power supply required

Ideal for small tanks! A transparent tube type liquid level gauge that allows visual inspection of the liquid level at a low price.

In the event of an accidental incident (damage), a check ball is built into the valve to minimize liquid leakage. A transparent tube is installed between the upper and lower valves, allowing for visual inspection of the liquid levels. The operating temperature is a maximum of 150°C for glass and 50°C for PVC. 【Features】 ■ No power supply required ■ Suitable for small tanks ■ Built-in check balls in the upper and lower valves to minimize liquid leakage in the event of an accidental incident (damage) *For more details, please refer to the related links or feel free to contact us.

  • Level gauges and level switches

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