Product Category

LPG Gas Flow meter

What is LPG Gas ?

LPG gas (Liquefied petroleum gas) is a kind of hydrocarbon with propane and butane as its main components; it is obtained as a by-product in the process of oil and natural gas exploitation and refining. It is a gas state at normal temperature and pressure, and it becomes a liquid only under conditions of pressure or temperature drop, so it is called liquefied petroleum gas. At room temperature, ethane, ethylene, propane, butene, butane in LPG Gas are all colorless and odorless gases, they are lighter than water and insoluble in water. The pungent smell in liquefied petroleum gas is produced by components such as mercaptans and ethers that are intentionally added during transportation and storage, which is convenient for the user to detect when the LPG gas leaks. The lpg gas is immediately volatilized into a gas under the normal temperature and normal pressure, and the volume suddenly expands by about 250 to 300 times, and spreads rapidly.

Composition of LPG Gas

Main ingredients: propane (C3H8), butane (C4H10)

Others: methane, ethane, propylene, butane


1. Flammable, explosive

Liquefied petroleum gas has a low flash point of –140°C~–40°C, which is dangerous. Liquefied petroleum gas can be ignited by tiny Mars after it is in contact with air. Its combustion value is high, 2.10×104~2.90×104Kcal. / m3, higher than the combustion value of natural gas. The burning speed of liquefied petroleum gas is 0.38~0.5m/s. The low calorific value of the gas is 22,000~26000kcal/m3, which is a good fuel. However, in the event of a fire and explosion accident, it will cause serious damage. Because it is heavier than air, it is easy to stagnate and accumulate in the low space such as the space, pits, ditch, sewer and corner of the ground. It is not easy to be blown away by the wind, and it is mixed with air to form explosive substances, which can cause explosion when it is in flame. Therefore, liquefied petroleum gas should be stored in a well-ventilated place. All LPG Gas flow meters should with Explosion proof.

2.  Low corrosive

Liquefied petroleum gas has low sulfur content and is generally non-corrosive, but softens the rubber and dissolves the paint and grease of those greases. Therefore, the liquefied petroleum gas uses a special high-pressure hose. And LPG gas flow meters we often use stainless steel 304 as wet parts material.

3.  Micro toxicity

When the concentration of LPG gas in the air is less than 1%, there is no danger to human health. However, prolonged exposure to a higher concentration of liquefied petroleum gas may adversely affect the nervous system; the concentration of liquefied petroleum gas in the air exceeds 10%. When it makes people suffocate. So we have high demand for the LPG Gas flow meters, it cannot leak.

LPG Gas Usage

1. Civil gas: cooking, boiling water, heating, etc.
2. industrial: drying, shaping, foaming, melting metal, baking and so on.
3. Agricultural production: baking, heating, ripening, etc.

LPG gas is so important, and the flowmeter for measuring liquefied petroleum is also purchased in large quantities. Common LPG gas flow meters include: gas turbine flowmeter, thermal mass flowmeter, vortex flowmeter, and these gas flowmeters all need explosion-proof function.

According to different pipe sizes, process connection requirement,we may choose wafer type , flange connection type, thread connection or insertion type gas flow sensors.

Silver Automation Instruments supply digital LPG gas flow meters with 4-20Ma outputs, alarm outputs, pulse outputs or RS 485 Communication.

LPG Gas flow meter Inquiry sample

Please send budget for supply of 20 flowmeters, for LPG gas flow measurement, diameter 1.1/2 " (40mm), maximum flow rate 82,0 kg / h. Mounting type integral. Process Pressure 2,0 bar, Process Temperature 25ºC.

After checking the specifications ,we choose thermal mass flow meter for this application.

Thermal mass flow meter


SRK-100 Series Thermal Mass Flow meter

40-DN40 mass flow sensor

I-Compact type display

PLF-Flange connection mass flow sensor

19-Probe Diameter: Ø19

6-Probe Material:316

A0-Explosive Proof

T0-Temperatur: -20~60 ℃

P3-Pressure: 0-2.0Mpa

D-Power Supply: 24VDC

1-Output: 4-20Ma

A0-No alarm

E-Digital display Thermal mass gas flow meter

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