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ASA Flow Meter: German Industrial Glass Tube Variable Area Sourcing Portal
Quick Answer: Silver Automation Instruments manufactures glass tube variable area flow meters for German ASA style replacements and new builds. We export from Nanjing to industrial buyers in Southeast Asia, Oceania, Latin America, Africa and the Middle East. Send your fluid, pipe size, flow range, pressure in bar and temperature in Celsius for a quotation.
This page is for engineers and procurement teams who need a German industrial glass tube variable area flow meter without long European lead times. We cover DN15 to DN80 sizes and can match many ASA panel cutouts and process threads. Wetted parts include 304 stainless steel, 316L stainless steel, PTFE and Hastelloy C.
What an ASA Flow Meter Means for Sourcing
In practice, ASA often appears in sourcing portals when a plant needs a German made glass tube rotameter. The original meter may be old or damaged, but the process line and panel cutout are still in service. We have seen this on customer sites in Malaysia and Saudi Arabia. The buyer wants a direct fit replacement without changing pipe work.
Most engineers skip the brand issue and check three things. First is the center distance between connections. Second is the scale range in liters per hour or cubic meters per hour. Third is the float and seal material. A clear nameplate photo helps us cross check the model.
Size and Flow Range Coverage
We build DN15, DN20, DN25, DN32, DN40, DN50, DN65 and DN80 glass tube variable area meters. Water ranges start at 2.5 to 25 liters per hour on a small DN15 meter and reach 2.5 to 25 cubic meters per hour on DN80. Air ranges start at 0.03 normal cubic meters per hour and reach 300 normal cubic meters per hour on larger connections.
For a standard DN25 water meter we recommend model GTF25A with G1 female BSPP threads, a 316L float and PTFE seals. A typical range is 100 to 1000 liters per hour. If the fluid has viscosity above 50 centipoise we may change the float or suggest an oval gear meter for better accuracy.
Matching German ASA Connections and Panel Cutouts
Our standard connections are G1/2, G3/4, G1, G1 1/2 and G2 female BSPP. We also provide BSPT male, NPT and DIN flanges on request. The scale backing and glass tube length can be adjusted to fit an existing panel opening. This matters for maintenance teams in Chile, Qatar and the Philippines.
A German style glass tube meter often uses a 304 or 316L stainless steel frame. Our standard frame is 304 stainless with 316L available for seawater and chemical dosing. Needle valves or toggle valves are available. PTFE seals are standard for chemical lines. Hastelloy C floats are an option for strong acids.
Output Options for Remote Monitoring
On many DN25 to DN80 models we can add a magnetic 4-20 mA transmitter. The signal connects to standard PLC input cards. We can also fit one or two limit switches for high and low flow alarms. Some plants use the limit switch for seal water failure on pumps.
Not every DN15 meter can carry a transmitter because the float travel is too short. If you need 4-20 mA HART on a small line, we may recommend a metal tube variable area meter or an electromagnetic flow meter for conductive fluids. The final choice depends on flow velocity, conductivity in microsiemens per c
Industries and Replacement Cases
We sell these meters to water and wastewater plants, food and beverage skids, chemical dosing systems, gas purging panels, marine water treatment and oil circulation lines. A paint manufacturer in Vietnam replaced German ASA meters on solvent dosing with our 316L and PTFE version. A palm oil refinery in Ghana uses our DN50 glass tube meter for cooling water monitoring.
These are simple visual meters. They do not need external power for local indication. The reading is clear when the fluid is clean and pressure is stable. For dirty fluids, solids or pulsating flow we usually recommend a different flow meter because the float can stick or bounce.
What to Include in Your RFQ
Send us the fluid name, density, viscosity in centipoise, operating flow range, pipe size, process connection, pressure in bar and temperature in Celsius. Tell us if you need limit switches or 4-20 mA output. A photo of the existing meter nameplate helps us check the tube diameter and float shape.
Do not send only a long text description with no physical size. We can quote from flow data alone, but the exact DN size and materials affect price and lead time. Standard delivery from Nanjing is 5 to 7 working days after drawing approval. We ship by DHL or FedEx for small meters and by sea freight for larger panels.
FAQ: ASA Flow Meter and German Glass Tube Sourcing
Can you supply an exact ASA model number from an old German meter? We cross reference from the nameplate, scale range and connection size. Send the serial number and a clear photo. We will propose a direct replacement or a close match.
Do you keep spare glass tubes and O ring kits in stock? Yes for standard DN15 to DN80 meters. Spare borosilicate glass tubes and PTFE or Viton O ring kits are available. We can include a spare parts list with the quotation.
What is the accuracy of a glass tube variable area meter? Typical accuracy is plus or minus 2.5 percent of full scale. Class 1.6 accuracy is possible on some ranges with careful calibration. The reading is local unless you add a transmitter.
Can you calibrate the meter for a fluid other than water or air? Yes. We calibrate for diesel, methanol, liquid soap, urea and LPG. The fluid must be clean and compatible with the wetted parts. State viscosity and density before ordering.
Do you offer third party inspection or material certificates? Yes. We can provide material certificates and EN 10204 3.1 test reports for an extra charge. Third party inspection by SGS or BV is possible before shipment.
Contact Silver Automation Instruments
Email your RFQ with fluid, flow range, pipe size, pressure in bar, temperature in Celsius and connection type. You can also send a photo of the existing meter nameplate. Our technical sales team replies within 8 working hours. Tel: +86-25-68650347. Whatsapp: +86-25-52155837. WeChat: +86 15365082610.
We supply industrial flow meters and process instruments from China to customers in Southeast Asia, Oceania, Latin America, Africa and the Middle East. Our product range includes electromagnetic flow meters, Coriolis mass flow meters, ultrasonic flow meters, oval gear meters, thermal mass meters and glass tube variable area meters like the ASA style covered on this page.