glass tubular level indicator level gauge

Bi-color water gauge consists of upper valve, lower valve, and gauge body, blow off valve, balancing tube and lamp house. The upper valve and lower valve can be fully opened and closed by Hand. Inside the valve body. There is a safety steel ball and safety valve seat. When the quartz glass rube is broken suddenly, the steel ball will remove to the safety valve seat in high speed pushed by high pressure steam to shut off the channel of the gauge automatically until the upper and lower valves is closed by hand. The ball will be reset by the pressure from the balancing tube and by its gravity.

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

Glass tube level indicator is a simple & reliable device for direct reading in atmospheric or pressurized tank ap - plication . Mounted side of the tank through flange or threaded connection . Liquid inside the tank passes through a transparent glass tube & liquid can be viewed through the glass tube and mea - sured by a scale mounted on the gauge . Glass Tube (A. Borosilicate glass; B. Quartz glass tube; C. Transparent Teflon tube; D. Acrylic plastic) fully Protected by C-cut frame.
These gauges are custom manufactured accord - ing to the C-C distance reuired. It is avail - able in single length of 2000 mm C-C Distance.We can extend the CC length by PVC tube.
We are providing Air Vent Plug at top & drain plug at bottom for taking sample. We can also provide Inbuilt Isolation Valve on request. PP construction is made with all PP isolation valves & internals

Measure ranges	300~5000mm
Working temperature	≤180ºC
Nominal pressure	PN0~16Bar
Meter material	carbon steel or SS304, SS316
flange standard	DIN，ANSI，JIS
Tube material	A. Borosilicate glass; B. Quartz glass tube; C. Transparent Teflon tube; D. Acrylic plastic

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)

Advantages of Glass Tube Level Gauge

Intuitive direct reading Liquid level can be seen directly through transparent glass tube without any conversion or electronic signal conversion.
Simple mechanical structure No electronic parts, no power supply required, works normally under power failure.
Low cost and economical Raw materials and processing cost are cheap; replacement glass tubes and spare parts are affordable.
Easy installation & maintenance Simple threaded/flange connection; convenient disassembly, cleaning and part replacement on site.
Wide compatibility for normal medium Suitable for water, lubricating oil, diesel, hydraulic oil and other low-corrosion normal-temperature liquids.
Small footprint Compact overall size, fits small oil tanks, gearboxes and narrow installation spaces.
Stable and reliable daily use Few vulnerable components, low failure rate for low-pressure, room-temperature working conditions.
Observe medium status simultaneously Not only liquid height, but also impurities, bubbles, oil-water stratification inside the medium can be checked at a glance.

Application Scenarios of Glass Tube Level Gauge

Hydraulic equipment oil tanks Injection molding machines, punching machines, hydraulic stations, gear boxes, thin oil lubrication stations to monitor lubricating oil and hydraulic oil volume.
Diesel & fuel storage tanks Generator fuel tanks, agricultural machinery fuel boxes, small oil storage barrels, auxiliary fuel tanks for boilers.
General industrial water tanks Cooling water circulation tanks, clean water storage tanks, small water supply buffer tanks.
Light industry & food small vessels Edible oil barrels, syrup temporary storage tanks, small mixing tanks with normal temperature and low pressure.
Small boiler auxiliary equipment Boiler expansion water tank, light oil ignition tank, condensed water small buffer tank.
Agricultural & construction machinery Excavator auxiliary oil tanks, diesel power machine oil boxes, watering equipment water tanks.
Sewage & waste water small pools Low-pressure normal temperature sewage intermediate barrels, circulating wastewater tanks without corrosion.
Small chemical normal-temperature containers Non-corrosive solvent temporary storage tanks, alcohol dilution barrels, low-concentration neutral liquid tanks.