Flowmax 4000i Ultrasonic Flow Meter

Accurate liquid flow measurement is essential in chemical, hygienic and high-purity applications where reliability and safety are critical. The Flowmax 4000i is a high-precision ultrasonic flowmeter designed for non-contact, wear-free measurement of conductive and non-conductive liquids. Its seamless measuring tube and chemically resistant construction make it suitable for demanding industrial environments.

Ultrasonic Flowmeter Technology

An ultrasonic flowmeter determines volumetric flow by analysing the transit time of ultrasonic signals passing through the liquid. As the device contains no moving parts, mechanical wear is eliminated and long-term measurement stability is ensured. This technology is particularly advantageous in applications involving aggressive chemicals, ultrapure water or hygienic processes.

Explore the complete range of ultrasonic flowmeters available from RST Elektronik.

Flowmax 4000i – Key Advantages

• Non-contact ultrasonic measuring principle
• No moving parts – maintenance-free operation
• Dead-space-free measuring tube design
• All wetted parts made from PFA
• Suitable for conductive and non-conductive liquids
• Integrated empty pipe detection
• Fast response time in milliseconds

The continuous measuring channel prevents residue accumulation and supports hygienic system design. This makes the Flowmax 4000i especially suitable for chemical dosing systems, pharmaceutical processes and high-purity water applications.

Technical Specifications

Mechanical Design

• Measuring tube material: PFA
• Housing material: PP
• Union nut material: PFA
• Nominal diameters available: multiple small-bore options
• Protection class: IP65
• Medium temperature: 0 … 60 °C
• Nominal pressure: up to 6 bar

Electrical Characteristics

• Power supply: 24 VDC, approx. 3.6 W
• Electrical connection: 5- or 8-pin connector

Inputs and Outputs

• 1 digital input (e.g. dosing start)
• 2 digital outputs configurable as pulse or empty pipe alarm
• 1 analogue output configurable as 0/4–20 mA
• RS-485 data interface

Measurement Performance

• Maximum measurement error: ±2% of reading or ±0.15% of full scale
• Optional calibration: ±1% of reading
• Repeatability: ≤ 0.5%
• Reference standard: VDI/VDE 2642

Application Areas

The Flowmax 4000i ultrasonic flowmeter is suitable for precise volumetric flow measurement in:

• Chemical and petrochemical industries
• Pharmaceutical and biotechnology systems
• Cosmetics and personal care production
• Food and beverage processing
• Deionised and ultrapure water systems
• Aggressive or corrosive liquid applications

Why Choose RST Elektronik

RST Elektronik supplies advanced industrial measurement solutions with technical consultation tailored to each project. Our ultrasonic flowmeter portfolio supports chemical, hygienic and specialised process requirements with reliable long-term performance.

View the full category of ultrasonic flowmeters to compare alternative models.

Request a Quotation

For detailed technical information, sizing support or pricing, contact our engineering team. We will help you select the most suitable ultrasonic flowmeter for your application.