u tube manometer

The Locus U-Tube Manometer is a high-precision pressure measuring device used to measure differential pressure in gas and air applications. It is made from high-quality acrylic, ensuring durability, accuracy, and reliability. The U-tube design allows clear visibility of liquid movement, making it ideal for low-pressure measurement applications.

Body Material: Acrylic / Glass
Tube Material: Borosilicate Glass
Measuring Range: 50 mm to 300 mm (Custom ranges available)
Fluid Used: Mercury / Red Oil / Water
Graduation: mm / cm
Mounting: Wall / Panel
Connections: Brass / SS 304 / SS 316
Accuracy: ±0.5% FS

Description

1. Product Details

Model	Material	Measuring Range (mm)	Fluid Used	Mounting Type
Locus-UM50	Acrylic Body	50-0-50	Red Oil / Mercury	Wall / Panel Mount
Locus-UM100	Acrylic Body	100-0-100	Red Oil / Mercury	Wall / Panel Mount
Locus-UM150	Acrylic Body	150-0-150	Red Oil / Mercury	Wall / Panel Mount
Locus-UM200	Acrylic Body	200-0-200	Red Oil / Mercury	Wall / Panel Mount
Locus-UM250	Acrylic Body	250-0-250	Red Oil / Mercury	Wall / Panel Mount
Locus-UM300	Acrylic Body	300-0-300	Red Oil / Mercury	Wall / Panel Mount

2. Working Principle

The U-Tube Manometer works on the principle of hydrostatic balance. When pressure is applied to one side of the U-tube, the liquid column rises or falls, indicating the pressure difference. The reading is taken from the graduated scale provided.

3. Principle of Operation

The liquid in the U-shaped tube remains balanced under normal conditions.
When pressure is applied to one side, the liquid level shifts proportionally.
The difference in height between the two columns is used to determine the pressure.
The measurement can be read directly from the scale.

4. Assembly Process

Cut the acrylic or glass body according to the design specification.
Install the borosilicate glass tube securely inside the frame.
Seal the ends with brass or stainless-steel fittings.
Fill the tube with measuring fluid (Mercury, Red Oil, or Water).
Ensure graduation markings are printed clearly for accurate readings.
Test the device under controlled conditions to verify calibration.

5. Installation Process

Mount the U-Tube Manometer on a wall or panel using screws or brackets.
Connect the pressure source to one or both tube ends.
Ensure the manometer is leveled properly to avoid reading errors.
Open the valves slowly to allow liquid displacement.
Observe the level movement and take readings accordingly.

6. Technical Specifications

Parameter	Details
Measuring Fluid	Mercury / Red Oil / Water
Tube Diameter	6-10 mm
Accuracy	±0.5% FS
Mounting Type	Wall / Panel
Pressure Range	0-500 mmH₂O
Temperature Range	-20°C to 60°C
End Connections	Brass / SS 304 / SS 316

7. Troubleshooting – Transparent Tubular Level Gauge

Problem	Possible Cause	Solution
No liquid movement	Blocked connection / Air trapped	Check connections, release air
Inaccurate reading	Manometer not leveled	Reinstall on a level surface
Leakage	Loose fittings	Tighten connections
Scale not visible	Dirty tube	Clean with a soft cloth
Sudden liquid drop	Pressure fluctuation	Stabilize pressure source

8. HS Code for Export

HS Code: 9026.10.10 (Instruments for Measuring or Checking Pressure of Liquids or Gases)

9. Frequently Asked Questions (FAQ)

Q1: What is the function of a U-Tube Manometer?

A: It measures pressure differences by balancing a liquid column in a U-shaped tube.

Q2: What fluids can be used in the Locus U-Tube Manometer?

A: Mercury, Red Oil, and Water, depending on application requirements.

Q3: How do I maintain the manometer?

A: Regular cleaning, checking for leaks, and ensuring proper leveling.

Q4: What is the accuracy of Locus U-Tube Manometers?

A: ±0.5% FS, ensuring high precision in measurements.

Q5: Can Locus manufacture custom-size U-Tube Manometers?

A: Yes, custom designs are available as per client requirements.

10. Applications

✅ Industrial HVAC Systems – Airflow and gas pressure measurement.
✅ Chemical Processing – Monitoring gas pressure in reactors.
✅ Laboratories – Calibration and pressure testing.
✅ Oil & Gas Industry – Pressure monitoring in pipelines.
✅ Medical Equipment – Precise pressure measurement in laboratory devices.
✅ Power Plants – Monitoring boiler pressure.

11. Why Choose Locus U-Tube Manometers?

✔ High-Quality Acrylic & Glass Material
✔ Customizable Ranges & Sizes
✔ CE, ISO 9001 Certified
✔ OEM/White-Label Manufacturing Available
✔ Competitive Export Pricing