Trusted Rotameters Manufacturer,
Built for Global
B2B Buyers
China's trusted rotameter manufacturer supplying glass tube, plastic tube, and metal tube flow meters -- CE & RoHS certified, with full OEM/ODM customization and USD 3.2M+ annual export volume.
10+
Years of Manufacturing
$3.2M+
Annual Export Volume
6
Dedicated Production Lines
50+
Countries Served
Are You Facing These Problems?
Unstable & Inaccurate Readings
Easy to Break, Costly to Repair
Failed Display & No Flow Data
Would you really want to see this happen to your project?
Quality Verified: e.g. Glass Tube Rotameter
Clear Scale & Transparent Housing
Transparent PVC cover with high-definition scale marks enables quick and intuitive reading, solving unclear display issues.
Heavy-Duty Industrial Fittings
Premium reinforced connectors deliver high sturdiness and long-lasting durability, effectively reducing breakdowns and maintenance frequency.
Stainless Steel Guide Rod
Built-in stainless steel guide rod keeps the float running smoothly, ensuring precise measurement and stable long-term operation.
Rotameter Series for Every Application
Glass tube, plastic tube, and metal tube rotameters engineered for industrial, environmental, and petrochemical applications.
Glass Tube Rotameter
Ideal for water, air, and non-corrosive media. Direct visual reading with borosilicate glass. Stainless steel or PTFE float options.
- Accuracy: ±2.5% FS
- Pressure: up to 1.0 MPa
- Temp: -20°C to 120°C
Metal Tube Rotameter
Suitable for high-temperature, high-pressure, and corrosive media. 304/316L stainless steel body with optional 4-20mA or RS485 output.
- Accuracy: ±1.0%-±1.5% FS
- Pressure: up to 25 MPa
- Temp: -40°C to 300°C
Plastic Tube Rotameter
PP and PTFE construction for aggressive chemical environments. Lightweight, corrosion-resistant, and cost-effective for water treatment applications.
- Accuracy: ±2.5% FS
- Pressure: up to 0.6 MPa
- Temp: 0°C to 80°C
Need a Custom Rotameter?
We support full OEM/ODM customization -- connection types, materials, signal output, and private labeling. Our engineering team responds within 24 hours with a feasibility assessment.
Connection Types
Thread · Flange · Clamp
Signal Output
4-20mA · RS485 · Pulse
Float Materials
SS · Aluminum · PTFE
Mold Lead Time
10-15 days standard
Why Global Buyers Trust Mellax Instruments
We're a China-based manufacturer with 6 dedicated production lines, in-house QC, and a decade of export experience.
Our End-to-End Quality Control Process
IQC -- Incoming Materials
RoHS compliant raw material inspection with full traceability documentation before production begins.
Precision Machining
Automated CNC machining with ±0.02 mm tolerance for all critical flow measurement components.
Performance Testing
Accuracy, pressure resistance, temperature cycling, and corrosion tests. Every batch verified per ISO 2859 sampling protocol.
100% Final Inspection
Every unit inspected before shipment. Calibration certificate, test report, and compliance documentation included in every order.
Global Export Markets
USD 3.2M+ annual export volume across 50+ countries.
50+
Countries
500+
Active Clients
10yr
Export Track Record
What Our Buyers Say
"We've been sourcing metal tube rotameters from Mellax for 3 years. Accuracy is consistently within spec, and their OEM labeling process is seamless. Delivery has never been late."
Become our next satisfied buyer"The CE and ISO documentation they provide is complete and audit-ready. Saved us significant time in our supplier qualification process. Highly recommend for European market compliance."
Ready to Place Your Order?
Tell us your requirements -- product type, quantity, application, and any customization needs. Our team will respond with a detailed quote and technical proposal.
24-Hour Quote Turnaround
Our sales engineers respond within one business day with pricing, lead times, and technical recommendations.
Full Compliance Documentation
CE, RoHS, REACH, ISO 9001 certificates and test reports included with every order -- ready for your procurement audit.
OEM/ODM Fully Supported
Custom branding, connection types, output signals, and special media compatibility -- all handled by our in-house engineering team.
Serving 50+ Countries
Experienced with international freight, customs documentation, and export compliance for all major global markets.