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Sight glass Product List and Ranking from 23 Manufacturers, Suppliers and Companies | IPROS GMS

Last Updated： Aggregation Period:Feb 18, 2026～Mar 17, 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:Feb 18, 2026～Mar 17, 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. サワダ製作所 Hyogo//Other manufacturing
  3. 三広アステック Tokyo//Industrial Machinery
  4. 4 BBKテクノロジーズ ​計装部門 Tokyo//Testing, Analysis and Measurement
  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:Feb 18, 2026～Mar 17, 2026
This ranking is based on the number of page views on our site.

  1. Round Glass Tube Water Level Gauge (Tubular Type) KGV-N Model サワダ製作所
  2. Direct-reading liquid level gauge (glass liquid level gauge) BBKテクノロジーズ ​計装部門
  3. Heuristic sight glass with protective cover [NM-P] MONOVATE(旧：日東金属工業) 八潮工場
  4. 4 Sight glass (peephole) SG 三広アステック
  5. 5 Metal Fusion Sight Glass Clinport(R) 日本クリンゲージ 東京営業所

Sight glass Product List

31～60 item / All 65 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
  • Sight glass

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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
  • Sight glass

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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
  • Sight glass

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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
  • Sight glass

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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
  • Sight glass

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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
  • Sight glass

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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
  • Sight glass

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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
  • Sight 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
  • Sight glass

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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
  • Sight glass

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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
  • NMB_04-1.jpg
  • Stainless steel utensils and containers
  • Sight glass

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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
  • Sight glass

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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
  • Sight glass

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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
  • Sight glass

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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
  • Sight glass

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Sanitary application site glass, site glass window

Sanitary application site glass, site glass window

Compatible with both CIP and SIP processes. Compact design. Hygienic design. Complies with extensive applications of ASME BPE.

The inline sight glass provided by Steriflow complies with the extensive applications of ASME BPE and is particularly suitable for high-purity piping systems in the pharmaceutical and biopharmaceutical industries. The structure features a transparent window design that offers a wide field of view and does not require backlighting. The inner diameter of the glass tube and connection matches the pipe diameter, ensuring no fluid residue occurs even when installed horizontally. Additionally, the sight glass window is suitable for various applications, especially for high-purity containers and piping systems in the pharmaceutical and biopharmaceutical industries. The large-diameter borosilicate window guarantees an appropriate field of view for the process. The SGW series combines borosilicate glass with stainless steel Tri-clamp™ rings using advanced technical methods. The two components form a continuous single unit with sufficient strength, free of gaps or cracks, and there are no joining materials between the glass and the ring. For more details, please contact us or download the catalog!

  • SGW.png
  • others
  • Sight glass

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Sight glass, flange type

Sight glass, flange type

Functional beauty and economy in "form". [Sight Glass Flanged Type]

A sight glass is a product used to check the presence of fluid in a pipeline, the mixing state of the fluid, or to visually confirm flow rate changes using flappers or balls. We introduce the flange-type sight glass. 【Features】 ○ Extensive lineup ○ Available with protective cover 【Standard Specifications】 ○ Connection: Flange type JIS 10k RF ○ Maximum operating pressure: 1.0 MPa ○ Maximum operating temperature: 150℃ (* Flange-type sight glass with ball: 85℃) ○ Gasket: T#9007-G20 ↓↓↓ For more details, please contact us. ↓↓↓

  • valve
  • Sight glass

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Site glass lantern type

Site glass lantern type

Functional beauty and economy in "form". [Site Glass Lantern Type]

A sight glass is a product used to check the presence of fluid in a pipeline, the mixing state of the fluid, or to visually confirm changes in flow using devices like flappers or balls. We would like to introduce the lantern-type sight glass. 【Features】 ○ Extensive lineup ○ Protective cover available (only for lantern-type sight glass with flange) 【Standard Specifications】 ○ Connection: Flange type JIS 10k RF ○ Maximum operating pressure: Size 15-100A: 0.5MPa (lantern-type sight glass with flange) Size 125×150A: 0.3MPa (lantern-type sight glass with flange) 0.5MPa (lantern-type sight glass with wafer) ○ Maximum operating temperature: Room temperature ○ Gasket: FPM (Viton rubber) ↓↓↓ For more details, please contact us. ↓↓↓

  • valve
  • Sight glass

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Sight glass made of steel plate

Sight glass made of steel plate

Functional beauty and economy in "form". [Site glass made of steel plate]

A sight glass is a product used to check the presence of fluid and the mixing state of fluid in pipelines, as well as to visually confirm flow rate changes with flappers or balls. We introduce steel plate sight glasses. 【Features】 ○ Extensive lineup ○ Custom production with protective covers available 【Standard Specifications】 ○ Connection: Flange type JIS 10k RF ○ Maximum operating pressure: Size 15-150: 1.0 MPa Size 200-150: 0.5 MPa ○ Maximum operating temperature: 150℃ ○ Gasket: T#9007-G20 ↓↓↓ For more details, please contact us. ↓↓↓

  • valve
  • Sight glass

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Sunny Techno Sight Glass GL-70

Sunny Techno Sight Glass GL-70

Confident / Uniquely different / Gentle products

We will create products that are useful to society, with the development concept of confident, uniquely different, and gentle products.

  • others
  • Sight glass

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Sight glass "Type C (standard type, high pressure type) - Type L (lantern)"

Sight glass "Type C (standard type, high pressure type) - Type L (lantern)"

A sight glass is a liquid level gauge used to check the flow inside pipes.

A sight glass is a liquid level gauge used to check the flow inside pipes. There are lantern-shaped types that are easy to check from all sides, and cross-shaped types used in stringent operating conditions. 【Product Lineup】 ○ C/Cross (Standard Type) ○ CB/Cross (High Pressure Type) ○ L/Lantern For more details, please contact us or download the catalog.

  • Other measurement, recording and measuring instruments
  • Liquid level control/level switch
  • Sight glass

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Flanged sight glass 2055

Flanged sight glass 2055

In terms of price and quality, of course, we are particularly satisfied with the delivery time of Taiwanese valves.

The Taiwan-made sight glass is a device installed in the middle of a piping system that allows for visual inspection of the flow conditions of fluids inside pipes and tanks through a glass window from the outside of the piping.

  • Company：YTK
  • Price：Other
  • valve
  • Sight glass

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Wiper-equipped sight glass 'FC-FO-Nf'

Wiper-equipped sight glass 'FC-FO-Nf'

The definitive version of the sight glass with a wiper! Equipped with an optional protector to adapt to harsh working environments.

The "FC-FO-Nf" is a product that is focused on having a sight glass that is clearly visible with wipers. In addition to powerful wipers on both sides, it is lightweight and durable. With the optional protector, it can adapt to harsh working environments. 【Features】 ■ Sight glass that is clearly visible with wipers ■ Powerful wipers on both sides ■ Lightweight and durable ■ Optional protector for adaptation to harsh working environments *For more details, please refer to the PDF document or feel free to contact us.

  • Liquid level control/level switch
  • Other process controls
  • Sight glass

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Wiper-equipped sight glass 'SU4W-SBM'

Wiper-equipped sight glass 'SU4W-SBM'

With SUS+ super cute wipes, there's no enemy! If you can't see the sight glass, it doesn't mean anything.

The "SU4W-SBM" features a body equipped with a flapper surrounded by a sight glass (cylindrical glass). When fluid flows, one end of the flapper is pushed, causing it to tilt. The greater the flow rate, the larger the tilt, making it a flapper-type sight glass. It has a built-in wiper brush. By simply gripping and rotating the sight glass during use, you can remove water stains and dirt from the inner surface of the sight glass, allowing for a clear view of the fluid. It has reference scale lines, making flow monitoring easy. 【Features】 ■ Guarantees visibility at all times with simple wiper operation ■ Stainless steel body achieves improved performance and low cost ■ Removes dirt just by gripping and rotating the sight glass during use ■ Compact size requires less installation space ■ Simple structure, robust, compact, and lightweight *For more details, please refer to the PDF document or feel free to contact us.

  • Liquid level control/level switch
  • Flow Meter
  • others
  • Sight glass

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Type 101 Cross Sight Glass (Without Nozzle)

Type 101 Cross Sight Glass (Without Nozzle)

You can see the flow very clearly! (There is also a ball float type)

The "Model 101 Cross Type Sight Glass (Without Nozzle)" features circular transparent glass plates on both the front and back sides, positioned perpendicular to the flow of liquid, allowing for monitoring of the liquid flow state through a circular viewing window. The circular glass plates are sealed with gaskets between the main body and the cover flange. Additionally, while the standard specification for the glass is tempered glass, custom options are available including Pyrex glass, transparent PVC, and transparent acrylic. 【Specifications】 ■ Connection & Size - PVC/PP Flanged: 15–200A Threaded: 15–50A ■ Gaskets - Custom options available including FKM and PTFE *For more details, please download the PDF or feel free to contact us.

  • Other work tools
  • Other measurement, recording and measuring instruments
  • Sight glass

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Yoshitake sight glass

Yoshitake sight glass

Can be used for both horizontal and vertical piping.

This is an introduction to the "Yoshitake Sight Glass" handled by our company. 【Features】 The flow rate changes can be easily checked with the flap and indicator board. It can be applied to both horizontal and vertical piping. For steam drainage, it is equipped with a mica plate. 【Model Numbers】 SF-1S15 SF-1S20 SF-1S25 SF-1S32 SF-1S40 SF-1S50 *Currently available for sale on "Plant Navi," a wholesale and procurement site exclusively for business operators dealing with plant piping materials and residential equipment, operated by Hasegawa Kizai Co., Ltd.

  • valve
  • Sight glass

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Yoshitake sight glass

Yoshitake sight glass

Applicable to both horizontal and vertical piping.

This is an introduction to the "Yoshitake Sight Glass" handled by our company. 【Features】 Flow changes can be easily confirmed with the flap and indicator board. It has an extremely small pressure loss and has little effect on the fluid's pressure. It can be applied to both horizontal and vertical piping. 【Product Numbers】 150F-13S15 150F-13S20 150F-13S25 150F-13S32 150F-13S40 150F-13S50 *Currently available for sale 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
  • Sight glass

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T-L-B site glass screw-in

T-L-B site glass screw-in

Ensure a reliable check of the flow of fluids such as water, warm water, air, and steam!

This is an introduction to the "TLV Sight Glass Screw-In" that we handle. 【Features】 This product allows for reliable checking of the flow of fluids such as water, hot water, air, and steam through the oscillation of the ball. 【Product Numbers】 TLV T5N15 TLV T5N20 TLV T5N25 *Available for sale on "Plant Navi," a wholesale and purchasing site exclusively for businesses dealing in plant piping materials and residential equipment operated by Hasegawa Kizai Co., Ltd.

  • valve
  • Sight glass

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Direct-reading liquid level gauge (glass liquid level gauge)

Direct-reading liquid level gauge (glass liquid level gauge)

With technology cultivated from the long-standing experience and achievements of Japan's first level gauge manufacturer, we support safe liquid level monitoring by preventing leakage and turbidity.

Through the special glass window, the liquid level is directly observed and confirmed. We accommodate all industrial fields from low temperature and low pressure to high temperature and high pressure. Tubular, reflective, and sight glass level gauges are suitable for on-site liquid level monitoring, while two-color level gauges can also be used for remote monitoring with a camera. High-quality mica prevents corrosion. Compatible with high-pressure gas certified products.

  • Other measurement, recording and measuring instruments
  • Sight glass

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Sight glass (sight flow meter)

Sight glass (sight flow meter)

A sight glass for piping that incorporates special technology developed in the manufacturing of liquid level gauges. It is suitable for critical piping such as corrosive fluids, chemicals, and high-temperature high-pressure piping.

You can monitor the flow of fluids. From basic options such as flow type, ball type, flapper type, and paddle wheel type, to lantern-shaped devices used in chemical and food-related applications, as well as various other uses including double-tube structures and coating applications. We also have numerous overseas delivery achievements.

  • Flow Meter
  • Sight glass

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