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Electro Flow Meter Manufacturing: Certified Industrial Instrumentation
Quick Answer: Silver Automation Instruments manufactures electromagnetic flow meters and certified industrial instrumentation for water, wastewater, chemical, food, oil and gas, and marine sites. The standard range covers DN6 to DN2000 with PTFE, PFA, hard rubber, and polyurethane liners. Outputs include 4-20 mA HART, RS485 Modbus, pulse, and frequency. Send your fluid type, flow range, pipe size, pressure, temperature, and conductivity for a quote.
Factory Calibration and Certified Build
We build electromagnetic flow meters in Nanjing, China. Each sensor goes through wiring, assembly, and wet calibration before dispatch. The calibration sheet includes flow rate, totalizer error, and linearity at multiple test points. We keep serial numbers on file for repeat orders.
Most engineers skip this part. We also make pressure transmitters and paperless recorders in the same certified industrial instrumentation range. Outside the electromagnetic line, we support Coriolis mass flow meters, ultrasonic flow meters, vortex flow meters, thermal mass meters, and oval gear meters for applications where electromagnetic sensing does not fit. That option helps when a skid builder wants one vendor for flow, pressure, and recording.
Certifications That Site Engineers Ask For
Our electromagnetic meters can be supplied with CE marking and ISO 9001 production records. Hazardous area versions come with ATEX Zone 1 or Zone 2 and IECEx certificates. A chemical plant in Malaysia ordered DN50 PFA lined meters for hydrochloric acid transfer. The process ran at 65 °C and 3 bar. We supplied Ex d IIC T6 protection and the full test reports.
Here is the thing. Certification is not only the housing. The liner, grounding electrode, and terminal box must match the fluid and the zone. We have seen this on customer sites many times. A site installs a gas zone meter on a liquid batch reactor without checking the liner temperature limit. That causes early failure.
Liner, Electrode and Pipe Sizing
Pipe size matters first. We keep DN6 to DN2000 electromagnetic flow sensors in the production schedule. Pressure ratings cover PN10, PN16, PN40, ANSI 150, JIS 10K, and AS 2129 for Australia. Give us the pipe size and flange standard. We can match it.
A water utility in Australia replaced 12 mechanical meters on bore water lines. They sent us the pipe size, flow range, and pressure. We supplied DN150 and DN200 hard rubber lined sensors with IP68 remote converters because the meter pits flood after heavy rain.
For chemical or food grade lines, PTFE and PFA liners work up to 180 °C. Hard rubber suits drinking water and wastewater below 80 °C. Electrode options include 316L, Hastelloy C, titanium, tantalum, and platinum-iridium. For seawater, titanium is the standard choice. For low concentration sulfuric acid, tantalum works but the price moves up. Do not guess the liner. We ask for fluid type, concentration, temperature, and cleaning protocol. That is how we avoid selling a meter that fails after the first CIP cycle.
Outputs and Minimum Co
Electromagnetic flow meters need liquid conductivity. The standard threshold is 5 µS/cm. Demineralized water and some condensates fall below that. If conductivity is below 5 µS/cm, use a Coriolis mass flow meter. If it is above 5 µS/cm, the electromagnetic meter works and costs less.
Outputs include 4-20 mA HART, RS485 Modbus RTU, pulse, and frequency. A pump station in Nigeria ordered 10 electromagnetic flow meters with battery powered remote converters and pulse output for rural water supply. They had no stable AC supply and no spare signal cable.
Customer Site Examples
Last year a customer in Vietnam asked us for a seawater flow meter for a desalination pilot plant. The pipe was DN65, flow range was 5 to 30 m3/h, and pressure was 4 bar. We supplied a compact electromagnetic flow meter with PTFE liner, titanium electrodes, 4-20 mA HART, and a local display. It left the factory in 10 days.
A paint manufacturer in Southeast Asia uses oval gear flow meters for solvent batching. Flow rates are low, 0.5 to 10 L/min, and viscosity changes by product. That site buys both oval gear and electromagnetic meters from us because they do not want two calibration suppliers.
How to Get a Quote
Send us your pressure (bar), temperature (°C), pipe size (DN), and flow range together with fluid type, conductivity, and power supply. We will recommend the liner, electrode, flange standard, and output. You can reach our engineers through Tel +86-25-68650347, WhatsApp +86-25-52155837, or WeChat +86 15365082610. The website is flow-meter.com.au.
Include your installation location and hazardous area classification. That way we can quote the correct certified industrial instrumentation without long back and forth.
FAQ: Five Questions Engineers Ask Before Buying
What is the lead time for a DN100 electromagnetic flow meter?
Standard DN100 meters with hard rubber liner and 316L electrodes usually leave the factory in 7 to 15 days. Special liners like PFA or PTFE, or Ex proof versions, can add 5 to 10 days.
Can you supply ATEX Zone 1 certified electromagnetic flow meters?
Yes. We supply flameproof or intrinsically safe versions for Zone 1 and Zone 2. Give us the gas group, temperature class, and cable entry size. We will match the certificate to the site.
What liner and electrode materials work for seawater?
For seawater desalination or cooling water, we recommend PTFE or PFA liner with titanium electrodes. For high pressure brine, check the chloride level. Tantalum may be needed if the temperature or concentration is high.
Do electromagnetic flow meters work on demineralized water?
They can work if the conductivity is high enough. The typical minimum is 5 µS/cm. Below that, use a Coriolis mass flow meter. If you are not sure, send us the conductivity value in µS/cm.
What information do you need for a price quote?
Send us your pressure in bar, temperature in °C, pipe size in DN, flow range, fluid type, and power supply. Also tell us the flange standard and whether you need HART, Modbus, or pulse output.