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Concoa Flow Meter: Ultra-High Purity Gas Chromatography Regulation Systems
Quick Answer
Silver Automation Instruments supplies thermal mass flow meters, pressure transmitters, and PT100 sensors for ultra-high purity gas chromatography regulation systems. These instruments work with helium carrier gas, hydrogen detector fuel, nitrogen makeup gas, and purge lines. Send your gas type, pressure (bar), temperature (°C), pipe size (DN), and flow range for a quote.
Gas chromatography regulation systems are sensitive to small changes in flow and pressure. A Concoa flow meter is common in many gas panel installations. The meter often sits downstream of a pressure regulator and upstream of a GC inlet. If the flow drifts, baseline noise increases and retention times shift. Silver Instruments builds thermal mass flow meters with 316L stainless steel wetted parts for these systems. The output is 4-20 mA HART or RS485 Modbus. This signal goes directly into a GC data system or a PLC.
In practice, one gas line rarely works with a single flow range. Helium carrier gas may run at 0 to 10 sccm. Hydrogen detector fuel may run at 30 to 50 sccm. Nitrogen makeup gas may need 0 to 100 sccm. A Concoa flow meter with a fixed range may not fit all three lines. That is why we ask for the actual gas type and method parameters first. Silver Instruments thermal mass flow meters cover ranges from 0 to 5 sccm up to 0 to 50 slm. Standard accuracy is ±1.0 percent of reading. Repeatability is ±0.25 percent of full scale. Response time is under 2 seconds.
Ultra-high purity means the gas path must stay clean. We use 316L stainless steel bodies and electropolished surfaces. Surface roughness is Ra 0.25 µm or better. The sensor is welded and helium leak tested. Do not use brass or aluminum in hydrogen or helium lines. The wrong material can add particles or moisture to a clean gas stream. Most engineers skip this part during checkout and then chase leaks for hours. We have seen this on customer sites many times.
Pressure control is just as important as flow control. A pressure transmitter with a 4-20 mA HART signal monitors cylinder pressure and regulated pressure. Silver Instruments offers ranges of 0 to 10 bar, 0 to 40 bar, and 0 to 100 bar. Wetted parts come in 316L stainless steel or Hastelloy C276. Accuracy is 0.1 percent of span. Some customers add a PT100 temperature sensor in the gas cabinet. The PT100 measures gas temperature from 0 to 50 °C. That data helps correct the flow signal or trigger an alarm if the enclosure gets too hot.
Connection details matter in ultra-high purity gas chromatography regulation systems. Common tube sizes are 1/8 in and 1/4 in with face seal fittings. Inline flow meters can use DN15 flanges for larger purge headers. Standard process pressure is up to 10 bar. A high pressure option up to 100 bar is available. The elec
Here is a real example. A gas supplier in Vietnam asked us for a thermal mass flow meter replacement on a hydrogen generator skid. The old rotameter was not stable. We supplied a 0 to 50 sccm thermal mass flow meter with 1/4 in face seal fittings. The customer connected it to a 4-20 mA HART input and stabilized the output after a 30 minute purge. A similar request came from a natural gas laboratory in Saudi Arabia. They needed a pressure transmitter for a GC carrier gas panel with 0 to 100 bar range and Hastelloy C276 wetted parts.
If you already have a Concoa flow meter drawing, include it with your inquiry. We check gas type, thread size, flow range, and electrical interface. That reduces the chance of a wrong order. If you do not have a drawing, send us the gas type, pressure (bar), temperature (°C), pipe size (DN), and flow range. For larger gas panel purge headers, we can also quote flow meters in kg/h instead of sccm.
Beyond gas service, Silver Automation Instruments supplies Coriolis mass flow meters for liquid mass flow in kg/h, electromagnetic flow meters for water and wastewater with conductivity above 20 µS/cm, and oval gear flow meters for oils with viscosity from 10 cP to 10000 cP. This helps when a gas chromatography lab also needs utility flow monitoring.
FAQ
Can Silver Instruments thermal mass flow meters replace a Concoa flow meter in a GC gas panel?
Yes in many cases. Check gas type, flow range, pressure, and fitting size first. We commonly match 1/8 in and 1/4 in face seal connections with 316L stainless steel bodies.
What flow range do we need for helium carrier gas?
Most helium carrier gas lines use 0 to 10 sccm or 0 to 50 sccm. Some methods need 0 to 100 sccm. Send your method parameters if you are not sure.
Do you supply pressure transmitters for ultra-high purity gas panels?
Yes. We offer 4-20 mA HART pressure transmitters with 316L or Hastelloy C276 wetted parts. Ranges cover 0 to 10 bar, 0 to 40 bar, and 0 to 100 bar.
Which industries do you serve?
We serve oil and gas refineries, chemical plants, water and wastewater plants, food and beverage gas packaging lines, and marine fuel systems. Main markets include Southeast Asia, Oceania, Latin America, Africa, and the Middle East.
How do I get a price?
Send gas type, pressure (bar), temperature (°C), pipe size (DN), and flow range by phone, WhatsApp, or WeChat. We respond with a quotation and lead time.
Silver Automation Instruments
Tel: +86-135-1213-1526
Whatsapp: 86-135-12131526
WeChat: +86 13512131526
Website: flow-meter.com.au