Description
KNKE Metal Tube Rotameter Product Overview
The KNKE Metal Tube Rotameter utilizes the variable area measurement principle to provide accurate continuous measurement of liquids and gases in closed pipelines. Available in both local display and smart remote transmission versions, this meter supports various output protocols to suit different user needs. Equipped with a 16-bit microprocessor and high-quality industrial components, it guarantees excellent performance in diverse applications. This rotameter is especially suitable for measuring low flow rates and small volumes of liquids, gases, and steam in a wide range of industries.
KNKE Metal Tube Rotameter Selection Parameters
| Parameter | Specification |
| Measuring Range | Water (20°C): 1-200,000 l/h Air (20°C, 0.1013MPa): 0.03-4000 m³/h (customizable flow rates) |
| Flow Ratio | Standard: 10:1 Special Model: 20:1 |
| Accuracy | Standard: 1.0 level Special: 0.5 level |
| Pressure Rating | Standard: DN15-DN50: 4.0 MPa DN80-DN200: 1.6 MPa Special: DN15-DN50: 25 MPa DN80-DN200: 16 MPa |
| Pressure Loss | 7 kPa – 70 kPa |
| Media Temperature | Standard: -80°C to +200°C PTFE: 0°C to 85°C High Temperature: up to 400°C |
| Viscosity | DN15: η<5 mPa·s (F15.1-F15.3), η<30 mPa·s (F15.4-F15.8) DN25: η<250 mPa·s DN50-DN150: η<300 mPa·s |
| Environment Temperature | LCD Type: -30°C to +85°C Pointer Type: -40°C to +120°C |
| Connection Type | Standard: DIN2501 flange Special: Customized flanges or threads |
| Cable Interface | M20*1.5 |
| Power Supply | Standard: 24VDC two-wire 4-20mA (10.8VDC – 36VDC) AC Type: 85-265VAC, 50Hz Battery Type: 3.6V @ 7.5AH lithium battery (lasts over 3 years) |
| Alarm Output | Upper or lower limit instantaneous flow alarm Open collector output (max 100mA @ 30VDC, internal impedance 100 ohms) Relay output (contact capacity 1A @ 30VDC or 0.25A @ 250VAC or 0.5A @ 125VAC) |
| Pulse Output | Cumulative pulse output, minimum interval 50 milliseconds |
| LCD Display | Instantaneous Flow: 0-50000 Cumulative Flow: 0-99999999 (supports decimal points) |
| Protection Level | IP65 |
| Explosion Proof Marking | Intrinsically Safe: iaⅡCT5 Explosion Proof: dⅡBT6 |
KNKE Metal Tube Rotameter Working Principle
The KNKE Metal Tube Rotameter operates by using a float that moves within the measuring tube. As the flow rate increases, the float rises until the buoyant force balances the float’s weight, stabilizing its position. This position is directly proportional to the flow rate. The float’s position is then transmitted via an internal magnet to the external indicator, providing real-time flow measurements. This unique design ensures that the indicator housing does not come into direct contact with the measuring tube, which allows the meter to operate reliably under high temperature and high-pressure conditions.
KNKE Metal Tube Rotameter Key Features
- Robust Full Metal Design
Featuring a durable all-metal construction, the meter is built to withstand harsh industrial environments. - Modular Measurement Tube and Indicator
The separate measurement tube and indicator design enhances flexibility and ease of maintenance. - Material Options for Different Applications
Choose from stainless steel, Hastelloy, titanium, or PTFE materials based on specific application needs. - Low Pressure Loss
Designed to minimize pressure loss, making it ideal for small diameters and low flow rate applications. - Reliable and Low Maintenance
With high durability and low maintenance requirements, this meter ensures long-lasting operation. - Non-Contact Magnetic Coupling
The non-contact magnetic coupling offers smooth, reliable data transmission, enhancing measurement accuracy. - Dual-Line LCD Display
A large, dual-line LCD display shows instantaneous and totalized flow rates simultaneously. It also features optional backlighting for ease of reading. - High Durability
Designed for use in high temperature, high pressure, and corrosive environments, offering excellent durability and reliability. - Wide Flow Ratio
A standard flow ratio of 10:1 is available, with special models supporting a wider flow ratio of 20:1. - Explosion-Proof Design
Suitable for use in flammable and explosive environments, ensuring safe operation in hazardous areas. - Multiple Power Supply Options
The rotameter supports two-wire, battery, and AC power supply options, offering flexibility for various applications. - Data Backup and Power Failure Protection
Features like data recovery, data backup, and power failure protection ensure continuous data reliability.
KNKE Metal Tube Rotameter Structure and Application
- Full Metal Construction: The meter’s full-metal structure makes it ideal for high-temperature, high-pressure, and corrosive media applications.
- Flexible Power Supply Options: It supports various power supply methods, including two-wire, battery, and AC options, providing flexibility for different industrial environments.
- Low Flow Rate Measurement: Perfect for measuring small diameters and low flow rates, it is highly versatile across different industries.
- Dual-Line LCD Display: The rotameter is equipped with a dual-line LCD that shows both instantaneous and cumulative flow values, complete with backlighting for visibility in low-light conditions.
- Minimal Straight Pipe Length Requirement: The device does not require long straight pipe sections for installation, offering flexibility in different pipeline configurations.
KNKE Metal Tube Rotameter Applications
The KNKE Metal Tube Rotameter is based on the variable area measurement principle, making it ideal for measuring liquids and gases. It is available in indicator, remote transmission, anti-corrosion, high pressure, and explosion-proof versions, each tailored to meet specific application needs. With standard analog outputs (0-10mA, 4-20mA), cumulative total, and digital communication capabilities, this meter is highly adaptable. It is commonly used in industries like oil and gas, chemical, power generation, pharmaceuticals, food processing, and water treatment, where accurate flow measurement is required in harsh environments.