Atlas Ultrasonic Flow Meter 1 in ports

The Atlas Ultrasonic Flow Meter 1" (Model LFM-1) is a precision flow measurement device designed for accurate, maintenance-free monitoring in Atlas UV water disinfection systems.
Employing ultrasonic signal technology, this module measures flow without any moving parts, ensuring long-term reliability and no mechanical wear.

When paired with compatible Atlas UV controllers, it enables automatic Energy Saver Mode, reducing lamp power consumption during idle periods and lowering operating costs — an ideal solution for commercial, light-industrial and high-flow domestic water systems.

Key Features

⚙️ Advanced Ultrasonic Technology

• Uses dual ultrasonic sensors to calculate real-time flow rate with exceptional stability.

• Zero contact with the water stream — eliminates mechanical degradation.

• Maintains ±5 % accuracy across the full flow range.

🌿 Energy Efficiency Integration

• Communicates directly with Atlas UV controllers (firmware v2.13 or higher).

• Automatically dims UV lamps when no flow is detected for one hour.

• Instantly resumes full lamp output upon water demand.

💧 Performance Specifications

• Flow range: 0.15 – 60 GPM (0.6 – 227 L/min)

• Accuracy: ±5 % within rated range

• Pipe size: 1 inch

• Connection type: 1" NPT adapters supplied

• Power input: +5 V DC (100 mA max)

• Inlet piping requirement: 10 inches (10 × pipe diameter)

• Pressure drop: Low across all rated flows

• Firmware support: Atlas v2.13 and later

💡 Smart LED Status Indicators

Technical Specifications

Installation & Setup

1. Mount location: Install on the inlet side of the UV chamber.

2. Orientation: Label and LED should face sideways for accurate operation.

3. Pipework: Provide 10 inches of straight pipe upstream of the Flow Meter.

4. Connections: Use supplied 1" NPT adapters with rubber washers; hand-tighten only.

5. Power: Connect to the included +5 V DC wall adaptor (max 100 mA).

6. Signal: Plug into the controller’s IEP port or compatible module port.

7. Commissioning: Power up the UV controller; the system automatically detects and configures the Flow Meter.

Note: Avoid installing near electric motors, transformers or high-voltage lines to prevent electromagnetic interference.

Operation & Display

Once active, the UV controller provides:

• Real-time flow rate (GPM, LPM or m³/h).

• System state: Full Power or Energy Saver Mode.

• Error messages for over-range or communication faults.

The Flow Meter also supports Energy Saver Mode, dimming the UV lamp after one hour of zero flow, and re-enabling full UV intensity immediately when flow resumes.

Maintenance & Cleaning

• Frequency: Once per year, or more often in hard-water conditions.

• Method: Submerge the flow tube only (not the sensor housing) in a commercial descaling cleaner such as CLR® or LIME-A-WAY®, then rinse thoroughly with water.

• Re-installation: Use plumber’s tape on NPT threads; hand-tighten unions.

• Calibration: Not required post-cleaning.

Applications

✅ Commercial UV disinfection systems
✅ Water process monitoring
✅ Industrial pre-filtration flow control
✅ Building services & water quality management

Benefits at a Glance

• Highly accurate ±5 % ultrasonic measurement

• Zero moving parts – no wear or mechanical failure

• Enables automatic energy-saving UV operation

• Easy plug-and-play installation

• Long-term reliability with minimal maintenance

Operation & Installation manual

Atlas Optional Modules