Welding glass level gauge

This Welding glass level gauge unit is designed to be welded directly onto a tank or other liquid-containing vessel. Standard Liquid Level Gauge units are furnished with a flat bottom. Upon request, the unit can be machined with a cylindrical radius to match the contour of the vessel. The Liquid Level Gauges are available in single or multiple section types.

Characteristics:
Can be used to show directly liquid level of tower, tank, groove and cases
Directly reading, can assure reading accuracy and reliable
Simple structure and convenient maintenance
Safety in use and long time in service

Working principle:
Lead fluid in tank to outer to sight glass level gauge based on communicator theory Show actual liquid level directly through transparent glass

Sight glass type level gauges select flexible graphite plunger ring as gasket to assure seal ability

Main technique parameters:

Materials	carbon steel strainless steel
Measure range	300, 500, 800, 1100 and 1400mm or customized
Working temperature	-20 to +250° C
Tank openingdimensions	71X length or 68X length

Welding glass level gauge

Application Scenarios of Welding glass level gauge

Welding glass level gauge (also called welded strip sight glasses) are directly welded to tank and vessel walls as integrated observation windows. Featuring a long continuous viewing area, leakproof welded connection and high pressure resistance, they are widely used across multiple industries for liquid level tracking and internal process monitoring.

1. Chemical & Petrochemical Industry

Vertical/horizontal storage tanks for acid, alkali, solvent, crude oil and refined oil
Batch reactors, blending kettles, sedimentation separators and distillation tanks
High-temperature medium buffer tanks, waste liquid treatment vessels
Working advantages: 304/316L/Hastelloy anti-corrosion frames; reflex/transparent glass optional to observe liquid layering, precipitation, foaming and real-time liquid height continuously over a large range

2. Thermal Power & Industrial Boiler Auxiliary Equipment

Deaerators, high/low pressure feedwater heaters, condensate recovery tanks
Waste heat boilers, steam flash tanks and heating station expansion tanks
Replace segmented glass plate level gauges to achieve full-range continuous water level observation without blind zones; withstand saturated steam temperature and medium pressure, stable for long-term continuous operation

3. Food, Beverage & Pharmaceutical Sanitary Production

Fermentation tanks, syrup mixing tanks, edible oil storage vessels, beverage brewing tanks
Pharmaceutical reaction tanks, liquid medicine preparation tanks, sterile buffer tanks
Polished stainless steel welded frames with sanitary PTFE gaskets, no dead corners for residue accumulation; easy CIP online cleaning, comply with food & pharmaceutical hygiene standardsAlibaba.co...

4. Environmental Protection & Water Treatment Equipment

Sewage reaction tanks, sedimentation tanks, filter tanks, desulfurization/denitrification absorption towers
Pure water tanks, circulating water buffer tanks, underground integrated wastewater equipment
Low-cost carbon steel welded versions for normal-temperature water media; operators observe turbidity, suspended solids and liquid level changes directly without extra sensors

5. Metallurgy, Cement & Waste Heat Recovery Equipment

Kiln waste heat recovery tanks, cooling water circulation tanks, pickling tanks
High-dust, slight vibration industrial vessels; borosilicate tempered glass resists thermal shock, avoids cracking under frequent temperature fluctuation

6. Special Low/Medium Pressure Pressure Vessels

Refrigeration liquid ammonia storage tanks, heat conduction oil storage tanks
Small pressure vessels without space for side-mounted glass plate level gauges
Welded integrated base eliminates flange leakage risk, high structural strength, meets ASME and domestic pressure vessel manufacturing codes

7. Pipeline & Large-diameter Process Pipe Inspection

Long horizontal process pipelines requiring continuous flow observation
Used to check medium flow rate, bubble generation and impurity clogging inside pipes

Core Matching Working Condition Features

Welded integral base, permanent connection with tank wall, fewer leakage points than flanged sight glasses
Customizable long viewing length (250–1000mm), full liquid level range monitoring without blind spots
Dual options: transparent glass for colored/turbid media; reflex glass for clean colorless liquid with high-contrast black-white interface
Multiple material combinations: carbon steel for water/oil, stainless steel for corrosive/hygienic media, alloy for strong acid & alkali
Simple disassembly for glass replacement without cutting the vessel body, low maintenance cost

Short Brochure Summary

Welded rectangular sight windows adopt direct welding installation with continuous long viewing slots. They are widely applied on chemical reactors, boiler deaerators, food fermentation tanks, environmental sewage tanks and various pressure storage vessels for full-range liquid level reading and real-time internal process observation, with excellent leakproof performance and wide temperature-pressure adaptability.