Steam/ Water Quartz Tube Two-color Water Level Meter

Steam/ Water Quartz Tube Two-color Water Level Meter is a liquid level meter developed by our company for the measurement of liquid level under normal temperature and pressure environment.This kind of liquid level meter can divide gas and liquid into red and green, and can observe the liquid level directly. It is widely used in chemical industry, water treatment, environmental protection and other industries.The cock of this level gauge is made of stainless steel, which has good anti-corrosion and anti-rust functions. Quartz glass tube can also be measured normally at high temperature, and has good anti-corrosion performance.

Working principle:
GZS-S stainless steel two-color quartz glass tube water level meter is the use of natural light in the liquid refraction of the optical principle, with the use of quartz glass tube under the red and green glass, the measurement of the liquid phase display green, gas phase display red.The level gauge is connected to the measured container by the upper and lower cock flanges at both ends. The position of the liquid level can be directly observed due to the different colors of gas and liquid.

Glass tube water level meter, simple structure, small volume, light weight, material consumption, small installation size, and easy to operate, fast.Suitable for urban construction, chemical, metallurgy, petroleum, pharmaceutical, food, beverage, environmental protection and other industries.

Measure ranges	300~3200mm
Working temperature	-20~600ºC
Nominal pressure	PN0~10Mpa
Quartz tube test pressure	≤13MPa
Meter material	carbon steel or SS304
Display	Green for liquid, red for air (don’t need electric power supply for the double color display)
flange standard	DIN，ANSI，JIS
Back light is optional	a, light Emitting Diode: electric power supply: 24VDC. b, fluorescent light tube: power supply: 220VAC

Model selection of Sight Glass Tubular Level Gauge
GZS		Pressure	temperature	Body material	Glass material	C-C distance
Type	C	Natural Color
	X	Bi-color Indicator with Lamp
	A	Bi-color Indicator without Lamp
Pressure		P1	1.0MPa
		P2	2.0MPa
		P4	4.0MPa
		P6	6.0MPa
		P10	10.0MPa
Temperature			T1	<60 ºC
			T2	<100 ºC
			T3	<180 ºC
			T4	<450 ºC
			T5	<600 ºC
Body material				CS	Carbon Steel
				304	Stainless steel 304
				316	Stainless steel 316
				PVC	PVC anticorrosive plastic
				PP	valve, flange PP anticorrosive plastic
				PTFE	Stainless steel lining PTFE
Glass tube material					Ordinary Glass Tube <100ºC
					Transparent Hart PVC anticorrosive plastic tube <60ºC
					Transparent Soft PTFE anticorrosive tube <180ºC
					Quartz glass tube a. <450ºC; b.<600ºC
Center to Center Distance						(mm)

Steam/ Water Quartz Tube Two-color Water Level Meter

Applications of Bi-Color Glass Tube Level Gauge with Light

1. Dark & enclosed equipment rooms

Basement water tanks, closed boiler rooms, underground oil stations, unlit workshop areas. Built-in LED light eliminates poor visibility; red/green two-color interface clearly marks liquid-gas boundary.

2. Boiler & thermal energy equipment

Low-pressure steam boilers, condensate tanks, heat transfer oil expansion vessels. Bi-color design distinguishes steam (red) and liquid water/oil (green), accurate liquid level reading even with steam fogging.

3. Small chemical normal-pressure storage tanks

Neutral solvent, light oil, cooling water containers. The lighting assembly solves blurred glass caused by steam and medium vapor.

4. Machinery hydraulic & lubricating stations

Gearbox oil tanks, circulating thin oil stations, generator fuel tanks. Night shift inspection does not require extra flashlights.

5. Food and beverage low-temperature mixing tanks

Normal temperature syrup, clean water temporary tanks. Waterproof LED lamp meets clean production environment.

6. Outdoor unattended equipment

Outdoor small water buffer tanks, standby diesel fuel tanks. IP protected lamp adapts dusk, rainy days for round-the-clock observation.

Core advantages matching the above working conditions

Dual-color principle: gas area shows red, liquid area shows green, obvious boundary compared to ordinary single-color glass tube gauges.
Integrated lighting removes the trouble of auxiliary lighting; clearly visible in dark environments.
Low voltage explosion-proof lamp optional for flammable oil and solvent medium.

Short Summary

Bi-color glass tube level gauges with lights are widely used in dim boiler houses, enclosed hydraulic stations, small steam equipment and dark chemical tanks. The built-in lamp and red-green dual-color display realize clear liquid/gas separation observation without extra lighting.