Description
“Ji” Japsin Instrumentation Acrylic Tube Rotameter for Water – 0 to 1200 LPH, 1/2-Inch BSP Male Connection
The “Ji” Japsin Instrumentation Acrylic Tube Rotameter for Water is designed for measuring and visually monitoring water flow rates in industrial processes, water treatment systems, laboratories, utility lines, and general fluid-handling applications. With a flow measurement range of 0 to 1200 litres per hour (LPH), this variable-area flow meter provides a simple and convenient method of observing water flow directly through a transparent acrylic measuring tube.
The rotameter operates on the variable-area principle, in which a float moves vertically inside a tapered measuring tube according to the flow rate. As water passes upward through the tube, the float rises until the upward force of the flowing liquid balances the float’s effective weight. The float position corresponds to the flow rate and can be read against the graduated scale provided on the tube.
Its transparent acrylic construction allows operators to observe the float position and flow condition during operation. The instrument is equipped with 1/2-inch BSP male stainless steel connections at both the top and bottom, providing threaded connection points for compatible water pipelines and fittings. This configuration makes it suitable for installations where a direct visual indication of water flow is preferred.
The “Ji” Acrylic Tube Rotameter is a practical choice for industrial buyers, plant operators, maintenance professionals, equipment manufacturers, and water-system installers looking for a straightforward mechanical flow measurement instrument. It does not require an external electrical power supply for local flow indication.
Key Features and Benefits
1. Flow Measurement Range of 0 to 1200 LPH
The rotameter is designed for water flow measurement from 0 to 1200 litres per hour. This range makes it suitable for compatible low-to-medium flow applications where operators need to monitor water movement through a pipeline or process line.
The graduated scale allows users to observe the approximate flow rate during operation. Selecting the correct flow range is important for obtaining useful readings. For best performance, the actual operating flow should fall within the calibrated measuring range of the instrument.
2. Transparent Acrylic Measuring Tube
The instrument features a transparent acrylic tube that allows direct visual observation of the float. This makes it easy for operators to identify the float position and monitor changes in water flow without needing a separate electronic display.
The transparent tube also helps users observe certain visible flow conditions, such as interruptions or fluctuations. Acrylic construction provides a lightweight alternative to some metal-tube flow meter designs. However, the tube must be used within the manufacturer’s specified pressure, temperature, and chemical compatibility limits.
3. Variable-Area Rotameter Working Principle
The rotameter works on the variable-area principle. It consists of a tapered transparent tube and a float positioned inside it. Water enters through the lower connection and flows upward through the tube, causing the float to rise.
As the flow rate increases, the float moves upward and the available flow area around it increases. When the forces acting on the float reach equilibrium, it stabilizes at a position corresponding to the flow rate.
The operator reads the flow rate from the graduated scale at the specified float-reading reference point. This provides a direct and easy-to-understand method of measuring water flow.
4. Stainless Steel Connections at Both Ends
The rotameter is supplied with 1/2-inch BSP male stainless steel connections at the top and bottom. These connections provide threaded interfaces for installation in compatible pipelines, fittings, and water circulation systems.
Stainless steel connection components are commonly selected for industrial fluid-handling equipment because of their durability and corrosion resistance in suitable environments. Before installation, confirm that the mating fittings use the correct BSP thread specification and size.
5. Simple Visual Flow Monitoring
One of the main advantages of an acrylic tube rotameter is its straightforward visual indication. Operators can observe the float position directly and check the flow rate without connecting the instrument to a control system.
This is useful in applications where continuous local monitoring is sufficient and electronic signal transmission is not required. The instrument can support routine process checks, equipment adjustment, and water-flow observation.
6. No External Power Required
The rotameter operates mechanically using the energy of the flowing liquid. It does not require an external electrical power supply for local flow indication.
This makes it suitable for installations where a simple flow measurement device is preferred, particularly in utility systems, water circulation lines, and applications where electrical instrumentation may not be necessary.
7. Compact and Practical Installation
The acrylic tube design provides a compact visual flow measurement arrangement for compatible water lines. The top and bottom threaded connections allow the instrument to be incorporated into a suitable pipeline assembly.
For correct operation, the rotameter should be installed in the orientation specified by the manufacturer, typically vertically with upward flow. Adequate straight pipe sections and proper alignment should be considered according to the installation requirements.
Industrial Applications
The “Ji” Japsin Instrumentation Acrylic Tube Rotameter for Water can be considered for a variety of compatible applications, including:
- Water treatment plants: Monitoring water flow through treatment and filtration systems.
- Water circulation systems: Observing flow rates in industrial circulation lines.
- Laboratories: Measuring water flow in compatible testing and experimental setups.
- Cooling water systems: Monitoring water supply to suitable cooling equipment.
- Industrial processing: Checking water flow in manufacturing and utility processes.
- RO and filtration systems: Observing water flow at suitable points in compatible systems.
- General engineering: Local flow indication in water-handling equipment and installations.
The rotameter should be selected according to the water quality, operating pressure, temperature, flow range, and installation conditions.
Installation and Usage Recommendations
For proper operation, install the rotameter in the orientation recommended by the manufacturer, generally vertically with the water flowing upward from the bottom connection to the top connection. Ensure that the instrument is aligned correctly and that the pipeline does not place excessive mechanical stress on the acrylic tube or threaded connections.
Before installation, verify the 1/2-inch BSP male thread compatibility and use suitable sealing practices. Avoid overtightening the connections, as excessive force may damage the fitting or instrument assembly.
Ensure that the water is sufficiently clean for the application. Suspended particles, scale, or debris may affect float movement and measurement performance. Where necessary, use an appropriate upstream filter. Do not exceed the manufacturer’s specified operating pressure or temperature limits.
During routine maintenance, inspect the acrylic tube for cracks, clouding, deposits, or other visible damage. Check that the float moves freely and that the scale remains readable. Clean the instrument using methods and materials approved by the manufacturer.
Why Choose “Ji” Japsin Instrumentation?
Japsin Instrumentation supplies industrial measurement instruments for flow, pressure, and temperature monitoring applications. The “Ji” Acrylic Tube Rotameter for Water combines a transparent measuring tube, variable-area operating principle, 0 to 1200 LPH measuring range, and stainless steel threaded connections in a practical visual flow measurement instrument.
Its simple operating principle and direct reading method make it suitable for applications where operators need to monitor water flow without requiring an electronic display or external power supply.
Choose the “Ji” Japsin Instrumentation Acrylic Tube Rotameter for Water for convenient local flow indication in compatible industrial and water-handling systems.
Japsin Instrumentation – Since 1974
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