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Digital LPG Gas Flow Meter: High Pressure Propane Fuel Delivery Sensors
Quick Answer: A digital LPG gas flow meter for high pressure propane fuel delivery measures mass or volume flow at pressures up to 100 bar and temperatures from -40 °C to +80 °C. Silver Automation Instruments supplies Coriolis and turbine LPG flow meters with 4-20 mA HART, pulse, RS485 Modbus, and ATEX Zone 1 options. Send your pressure, temperature, pipe size, and flow range for a specific model and budget price within 12 hours.
Most engineers ask for a digital LPG gas flow meter when they need reliable data from truck loading, cylinder filling, vaporizer lines, or burner fuel skids. High pressure propane fuel delivery sensors are not all the same. Liquid propane at 15 to 25 bar behaves like a light solvent and a low viscosity fluid. Vapor propane behaves like a gas with variable density. The sensor must match the phase.
Silver Automation Instruments is an industrial flow meter manufacturer and supplier based in Australia. We ship to oil and gas users in Southeast Asia, the Middle East, Africa, and Latin America. Our factory has supplied digital LPG gas flow meters to LPG distributors, industrial burner OEMs, and propane fueling stations.
Recommended Flow Meter Technologies for LPG
For high pressure liquid propane, Coriolis mass flow meters are the preferred choice. They measure kg/h directly, read density, and do not require a separate flow computer for temperature compensation. Silver Instruments offers Coriolis LPG flow meters from DN15 to DN80 with accuracy of 0.2 percent. Outputs include 4-20 mA HART, pulse, and RS485 Modbus.
For lower budgets, a turbine flow meter with a PT100 temperature sensor works well in clean liquid propane lines. We have supplied turbine meters for DN25 and DN40 LPG truck loading in Vietnam and Malaysia. One customer ran a DN40 line at 18 bar with a flow range of 200 to 3000 kg/h. The turbine meter plus PT100 gave a stable 4-20 mA signal to a PLC.
For vapor return lines and low flow propane gas, thermal mass flow meters are practical. They handle 0.5 to 1000 kg/h in gas service and provide direct mass flow output. Do not use a turbine meter on wet propane vapor. Condensate damages the bearing and ruins the pulse signal.
Key Parameters for High Pressure Propane Fuel Delivery Sensors
Send us four data points when you request a quote. Pressure in bar, temperature in °C, pipe size in DN, and flow range in kg/h or liters per minute. This is the fastest way to get a correct model. For example, a typical cylinder filling line runs 12 to 18 bar, 5 to 35 °C, DN25, and 300 to 2000 kg/h. This application uses a Coriolis meter with PN63 flanges.
Pressure rating matters. A standard PN25 meter is not enough for high pressure propane fuel delivery above 20 bar. For 20 to 40 bar liquid propane, specify PN63 or PN100. Silver Instruments uses stainless steel 316L wetted parts on LPG Coriolis meters. The sensor body accepts process connections like ANSI 150, ANSI 300, PN40, PN63, or PN100 flanges.
Temperature is another field issue. LPG expands quickly with temperature rise. If the line temperature exceeds 80 °C, use a meter with a high temperature transmitter option. Our standard digital LPG gas flow meter operates from -40 °C to +80 °C. High temperature versions extend up to 150 °C. We have seen this on customer sites many times: a meter sized correctly for flow but not for pressure loses accuracy after a few months.
Digital Outputs and ATEX Certification
High pressure propane fuel deli
Digital outputs reduce wiring and improve data quality. A 4-20 mA HART signal sends flow rate and diagnostic data on the same loop. RS485 Modbus RTU connects directly to a PLC or remote terminal unit. Pulse output works for totalizing in batch filling. In practice, most engineers specify 4-20 mA HART plus pulse for truck loading and cylinder filling.
Local display helps operators view total flow in kg or liters. Silver Instruments LPG flow meters include a backlit display with totalizer, flow rate, and alarm status. The display can be rotated 90 degrees for panel mounting.
Installation and Field Notes
Here is the thing. Installation decides accuracy more than the sensor itself. Install the digital LPG gas flow meter downstream of a strainer. Liquid propane should fill the meter completely. Keep the sensor away from pumps, control valves, and elbows. Use 5 DN of straight pipe upstream and 3 DN downstream. We have seen unstable readings on a customer site in Indonesia because the meter was mounted directly after a globe valve. Moving the meter solved the problem.
For truck loading, mount the meter after the pump and after the air eliminator. Trapped vapor causes the meter to read high and the truck to receive less liquid propane than invoiced. For vapor lines, mount the sensor vertically with flow downward to prevent liquid accumulation.
Price and Supplier Information
Digital LPG gas flow meter price depends on line size, accuracy class, and certification. A DN25 Coriolis LPG meter for high pressure propane fuel delivery starts around 2400 USD. A DN25 turbine LPG meter starts around 800 USD. A DN50 Coriolis meter with PN100 flanges and ATEX Zone 1 starts around 5200 USD. These are reference prices for budget planning, not final offers.
Send us your pressure in bar, temperature in °C, pipe size in DN, and flow range. We will reply with a datasheet, dimensional drawing, and price list. Tel: +86-135-1213-1526. WhatsApp: 86-135-12131526. WeChat: +86 13512131526.
FAQ: Digital LPG Gas Flow Meter for High Pressure Propane Fuel Delivery
Can one meter measure both liquid propane and propane vapor? No. Liquid and vapor phases have different density and signal behavior. Use a separate Coriolis or turbine meter for liquid, and a thermal mass meter for vapor return.
What pressure rating do I need for high pressure propane? For 10 to 20 bar liquid propane, PN40 is common. For 20 to 40 bar fuel delivery, select PN63 or PN100. We always ask for the maximum operating pressure, not the normal pressure.
Do I need ATEX certification for an LPG flow meter? Yes if the meter is installed in a hazardous area. Liquid propane leaks can create flammable vapor. Silver Instruments offers ATEX Zone 1 and Zone 2 versions with Ex d or Ex ia transmitters.
Which output signal is best for a PLC? RS485 Modbus RTU gives the most data. 4-20 mA HART is easier for existing analog loops. Pulse output is good for batch totalizing. Many customers use 4-20 mA HART plus pulse.
How do I get a quote from Silver Automation Instruments? Send us your pressure in bar, temperature in °C, pipe size in DN, and flow range. Contact Tel: +86-135-1213-1526, WhatsApp: 86-135-12131526, WeChat: +86 13512131526.