Low Flow Glass Tube Rotameter

Locus Low Flow Glass Tube Rotameter is a highly precise instrument for measuring low flow rates of liquids and gases in various industrial applications. Made with high-quality borosilicate glass for durability and accuracy, it offers easy visual flow monitoring with a floating bobbin indicating the flow rate.

Brand :- LOCUS
Material :- Borosilicate Glass Tube, SS304/SS316 End Fittings
Flow Range :- 0.1 LPH to 100 LPH (Customizable)
Accuracy :- ±2% of Full Scale
Mounting :- Panel / Inline / Vertical Mounting
Connection Type :- Flanged / Threaded / Hose Nipple
Application :- Water, Air, Gases, Chemical Flow Measurement
Certification :- ISO 9001:2015, CE Certified, MSME Registered

Description

1. Product Description

2. Specifications

Feature	Specification
Tube Material	Borosilicate Glass
Body Material	SS304 / SS316 / Acrylic
End Connections	Threaded / Flanged / Hose Nipple
Flow Range	0.1 LPH to 100 LPH
Pressure Rating	Up to 10 Bar
Temperature Range	-10°C to 100°C
Accuracy	+/- 2% FSD
Float Material	SS316 / PTFE / Glass
Scale Marking	Engraved / Printed on Tube

3. Working

The Rotameter works based on the variable area flow measurement principle. As fluid flows through the vertical tube, it lifts a float to a level where the upward force of the fluid matches the downward force of gravity. The position of the float corresponds to the flow rate, which can be directly read on the graduated scale.

4. Principle

Operates on variable area flow measurement.
The float rises when the fluid flows, increasing the area for fluid passage.
The equilibrium position of the float indicates the flow rate.
Flow rate can be measured without external power.

5. Assembly

The glass tube is placed inside a protective housing.
End connections are threaded or flanged for easy integration.
The float is inserted into the tube for precise flow indication.
Scale markings are aligned for accurate measurement.

6. Installation Process

Ensure the mounting position is vertical.
Secure the Rotameter to the panel or pipeline using the provided fittings.
Connect the inlet and outlet as per the specified direction.
Ensure no external vibrations affect the device.
Gradually start the flow to check for stable readings.

7. Technical Specifications

Parameter	Details
Flow Media	Liquids / Gases
Measuring Principle	Variable Area Flow Measurement
Pressure Drop	Low
Indication	Direct Scale on Glass Tube
Operating Pressure	Up to 10 Bar
Float Sensitivity	High Accuracy

8. Troubleshooting – Transparent Tubular Level Gauge

Issue	Cause	Solution
No Flow Indication	Clogged Tube	Clean the tube and reassemble
Fluctuating Float	Air Bubbles in Fluid	Bleed the air before operation
Inconsistent Readings	Improper Installation	Ensure proper vertical mounting
Float Stuck in Position	Contaminants in Fluid	Clean and inspect float movement
Leakage	Loose Fittings	Tighten connections securely

9. HS Codes for Export

9026.10.00 – Flow Measuring Instruments (Rotameter)
9026.20.00 – Liquid Flow Measurement Devices

10. Frequently Asked Questions (FAQ)

Q1: What is the maximum temperature the rotameter can handle?

A: It can withstand temperatures up to 100°C. Custom high-temperature versions are available.

Q2: Can the Rotameter measure gas flow?

A: Yes, it is suitable for both liquid and gas flow measurement.

Q3: What is the accuracy of this device?

A: The accuracy is +/- 2% of full-scale deflection (FSD).

Q4: What are the mounting options?

A: It can be mounted inline, on a panel, or on a vertical surface.

Q5: Does it require power to operate?

A: No, it operates without external power. It uses the fluid’s natural flow force.

11. Applications

✅ Chemical Processing Plants – Measures low flow rates of chemicals.
✅ Pharmaceutical Industry – Ensures precise liquid/gas flow control.
✅ Water Treatment Plants – Monitors water and gas flow.
✅ Food & Beverage Industry – Checks process flow for quality control.
✅ Petrochemical Industry – Used for hydrocarbon and gas flow measurement.
✅ HVAC Systems – Ensures controlled flow in cooling and heating systems.

12. Locus Brand – Your Trusted Partner for Precision Flow Measurement Solutions

✔️ Manufactured under ISO 9001:2015 certified processes
✔️ CE Certified for European Standards
✔️ Customizable as per industrial requirements
✔️ Export-Ready with HS Code Compliance