FM-55 Digital Micro Flow Meter

Product Description

The FM-55 Digital Micro Flow Meter is a compact electronic flow meter designed for measuring low-flow rates of compatible liquids, including biodiesel, diesel, HVO, XTL, gasoline, and kerosene. Featuring a precision gear-based measuring mechanism and a digital display, it provides a flow range from 0.1 to 50 L/min, depending on the selected model.

Available in four models with different connection sizes, the FM-55 series supports applications requiring accurate measurement of small or variable liquid flow rates. Its 360° rotatable display allows convenient viewing from different installation angles, while the sealed housing is designed to help protect the meter against water splashes and moisture. Selected configurations also support pulse output for integration with compatible monitoring and dispensing systems.

Key Features

• Micro Flow Measurement – Four models cover flow rates from 0.1 to 50 L/min.
• Digital Display – Provides clear readings during liquid transfer and dispensing.
• ±1% Accuracy – Designed for precise liquid flow measurement.
• Precision Gear Metering – Uses a gear-based mechanism to measure liquid flow.
• 360° Rotatable Display – Allows the display to be adjusted for easier viewing.
• Compact Structure – Suitable for installations where space is limited.
• Multiple Connection Sizes – Available with 1/4″, 3/8″, 1/2″, and 3/4″ connections.
• Pulse Output Option – Supports connection to compatible monitoring or control equipment.
• Sealed Housing – Designed to help protect against water splashes and moisture.
• Multiple Material Options – Catalog lists aluminum alloy / SS 304.

Applications

The FM-55 series is suitable for:

• Diesel fuel transfer and dispensing
• Biodiesel measurement
• HVO and XTL fuel systems
• Gasoline and kerosene transfer
• Low-flow liquid dispensing
• Fuel hose and dispenser systems
• Industrial liquid transfer
• Equipment fluid monitoring
• Compatible automated metering systems

Confirm material and seal compatibility before using the meter with a specific liquid.

Technical Specifications

Model Selection

All four models are listed with ±1% accuracy and a digital display in the supplied catalog.

Main Configuration

The catalog does not identify which specific models include pulse output or the exact material assignment for each model. Confirm these details against the product configuration before publishing.

Product Advantages

Low-Flow Measurement Options

The FM-55 series covers four flow ranges, from 0.1–1 L/min to 5–50 L/min. This allows buyers to select a meter according to the required operating flow instead of using one oversized meter for every application.

Gear-Based Metering

The gear-based measuring mechanism is designed to measure liquid passing through the meter. It provides a compact metering solution for compatible fuel transfer and dispensing systems.

Adjustable Digital Display

The display can rotate through 360°, helping operators read the measurement from different viewing angles. This is useful when the meter is installed in a confined space or at an awkward orientation.

Flexible System Integration

The series offers several connection sizes and pulse output on applicable configurations, supporting integration into compatible fuel dispensing, monitoring, or control systems.

Compact, Sealed Design

The compact housing helps simplify installation, while the sealed structure is designed to resist water splashes and moisture in suitable operating environments.

Installation Considerations

1. Select the model according to the required flow range and connection size.
2. Confirm whether the system uses BSP or NPT threads before installation.
3. Check fluid compatibility with the meter body, gears, seals, and other wetted components.
4. Install the meter in accordance with the indicated flow direction and the manufacturer’s instructions.
5. For pulse output applications, confirm the electrical interface and signal specifications.
6. Keep the system within the meter’s verified operating pressure and temperature limits.

FAQ

1. What is the FM-55 Digital Micro Flow Meter used for?

The FM-55 is designed to measure low liquid flow rates in compatible fuel transfer, dispensing, and fluid handling systems. It can be used in applications involving diesel, biodiesel, HVO, XTL, gasoline, and kerosene, subject to material compatibility.

2. What is the difference between FM55-1, FM55-2, FM55-3, and FM55-4?

The main differences are their flow ranges and connection sizes. FM55-1 is designed for 0.1–1 L/min with a 1/4-inch connection, while FM55-4 covers 5–50 L/min with a 3/4-inch connection. The correct model should be selected according to the actual operating flow and pipe connection.

3. What does the ±1% accuracy mean?

The stated ±1% accuracy indicates the meter’s specified measurement accuracy under applicable test conditions. Actual results can be affected by flow stability, liquid properties, installation conditions, and calibration. For applications requiring tighter measurement tolerances, verify performance under the intended operating conditions.

4. What is the benefit of the 360° rotatable display?

The rotatable display allows the reading angle to be adjusted after installation. This makes it easier for operators to view the measurement when the meter is installed in a compact enclosure, on a fuel hose, or in a position where the display would otherwise be difficult to read.

5. Can the FM-55 connect to an external monitoring system?

The catalog shows a pulse output configuration. This can support external monitoring or control when the receiving equipment is compatible with the meter’s output signal. Confirm the available output type, wiring, and electrical specifications for the selected model before integration.

6. How do I choose the right FM-55 model?

Start with the expected operating flow rate, then confirm the connection size and thread standard. The meter should be selected so the normal operating flow falls within its specified range. Also verify the liquid compatibility, installation conditions, and whether pulse output is required.