Product Introduction:
The Hollysys AFM 2000 Series Metal Tube Rotameter is a reliable, easy-to-use instrument designed for precise measurement of liquid and gas flow rates in industrial processes. Featuring a robust metal tube construction and a float-type sensor, it offers stable performance in harsh environments, including high-pressure, high-temperature, or corrosive conditions. The series includes multiple models for diverse applications, from chemical dosing to pipeline monitoring.
Product Principle:
The AFM 2000 operates on the variable area principle: as the fluid flows upward through the tapered metal tube, the float rises to a position where the upward force from the flow equals the float's weight. The float's position corresponds to the flow rate, which is visually indicated on the graduated tube. For industrial automation, optional electrical transmitters convert the float position into 4-20mA analog signals or digital outputs.
- Dual-Medium Support: Accurately measures both liquids and gases with a single instrument.
- Robust Construction: Stainless steel tube and corrosion-resistant wetted parts ensure long service life in aggressive environments.
- Flexible Installation: Available with flanged or threaded connections, compatible with international standards.
- Multi-Point Calibration: Factory-calibrated for specific media (density, viscosity) to ensure high accuracy.
- Safety Compliance: Explosion-proof models (ATEX certified) suitable for Zone 1/21 hazardous areas.
Instrument Diameter |
DN15~DN150 |
Measuring Range |
Water (20'ºC)16~150000L/h; Air (20'C 0.1013MPa) 0.5~5000m3/h |
Range Ratio |
Standard: 10:1; Particular: 20:1 |
Accuracy |
1.0 level; 1.5 level |
Wetted Materials |
SS316,SS304,SS316L,PTFE lining, Hastelloy C, Ti titanium lining |
Pressure Level |
Standard 1.6MPa~4.0MPa, Particular 5~42MPa |
Connection |
Flange Standard: HG/T20592-2009; Or any other standards specified by users |
Ambient Temperature |
-40ºCºC~120ºCºC,Flameproof: -20'ºC ~+40'ºC, Intrinsically Safe: -20°ºC ~+40°C |
Medium Temperature |
Standard -40°C ~+120°ºC; Particular -80'ºC ~+350°ºC; PTFE lining ≤ 80°C |
Signal Output |
Two-wire 4~20mA output; Hart communication; Two-wire prefabricated switch sensor, 8V DC powersupply |
Power Supply |
Standard: 24V Dc (10.8V DC~28V DC); AC type: 220V AC(85~265V AC); Battery type: 3.6V-9Ahlithium battery |
Explosion-proof Levels |
Intrinsically Safe: Exia ll CT6 Ga; Flameproof: Exd ll CT6 Gb |
Protection Class |
IP65 |
Way of Display |
On-site pointer display; LCD display(selectable) |
Electrical Connections |
1/2"NPT; M20x1.5 |

Kexiang Automation(Shandong) Co., LTD is committed to becoming a first-class industrial Internet of things visual monitoring system solution integrator.
Kexiang Automation is located in the scenic coastal city of Yantai. Since its establishment, the company has been adhering to the "Customer first, Integrity-based" business philosophy, always adhere to the "Base on products, Build quality" business policy. Our IoT visual monitoring system is based on "Industry 4.0" and was born under the background of "Made in China 2025". It is a 5S industrial IoT control system integrating production process technology, equipment technology, automation technology, Internet operation technology and IT technology.
Our IoT visual monitoring system mainly uses the Cyber-Physical System technology(CPS) to digitize and intelligently optimize the supply, manufacturing and sales information in industrial production, and finally achieve a fast, effective, personalized and visual display monitoring effect.


Q: Are you a manufacturer or trader?
A: We are manufacturer which focuses on sensor and IoT solution provider for 10 years.
Q: How long is your delivery time?
A: It depends on the quantity. Normally it's about a week to two weeks.
Q: How to get quotation?
A: Please tell us the pipe diameter, measuring medium, flow rate, temperature, pressure, connection type and accuracy of the product you need, we will choose the most suitable product for you.
Q:Can I design our own logo or color ?
A:Sure ! we can laser mark your logo on products; OEM and ODM customization are welcomed.
Q:Can I place a small order for the first time?
A:Yes. We have no MOQ limit. Any order means your recognition of us, we believe we will have long-term cooperation.
Q: What is the warranty of your products?
A: Our warranty time is 12 months after shipment.
Q: What's the transport?
A: Express such as DHL, FedEx, TNT, UPS for freight prepaid and we can also use your own courier account to do the freight collect. For more goods we can arrange by air or by Sea.
Q: What are your terms of payment?
A: We could accept T/T, PayPal, Western Union, etc.