The SE Weighted Level Gauge is designed to measure the level of powdered, granular, and bulk solid materials in silos, enabling users to reliably monitor the material level within the storage container. The device consists of a sensor and a control display unit. The sensor’s design incorporates the advantages of similar products both domestically and internationally, with its unique structure and transmission mechanism overcoming many common issues previously encountered with other pendulum level meters, ensuring reliable operation, minimal maintenance, and broad applicability.

The control display unit employs a 16-bit microcontroller, which programmatically controls the sensor’s entire detection process, processes the acquired signals, calculates the results, and displays the material level digitally on the panel. It also outputs a corresponding 4–20 mA analog current signal . Measurements can be conducted automatically at scheduled intervals or manually as required.

This translation maintains technical accuracy while ensuring clarity and consistency with industry terminology (e.g., “pendulum level meter” aligns with descriptions in 1 and 2). Key features such as programmable control, dual measurement modes, and signal output are explicitly highlighted.

The Weighted Level Gauge consists of a reduction motor, reel (take-up spool), cable (steel cable), weight, pulser wheel, position sensor, and control circuit. When level detection is initiated, the weight descends, and the cable drives the pulser wheel to rotate. The position sensor and control circuit calculate the number of rotations of the pulser wheel, thereby determining the distance the weight descends until it contacts the material. The measured data is displayed on the instrument and converted into an analog signal output .

Key Components and Logic Flow

1.Components :

    Reduction motor → Reel → Cable (steel cable) → Weight → Pulser wheel → Position sensor → Control circuit.

2.Process :

    Descent : The weight lowers, pulling the cable.

    Rotation : The cable drives the pulser wheel to rotate.

    Calculation : The sensor and circuit count the rotations to calculate the descent distance.

    Output : Displays the level and converts it into an analog signal .

• Immune to environmental interference factors such as sound waves, dust, static electricity, and temperature variations, ensuring measurement accuracy.

• Microprocessor control system for user-friendly operation and comprehensive functionality.

Adjustable high/low-level alarm settings (output contacts: 3A/250Vac, SPDT).

• LCD dot matrix display (8 x 2 with backlight).

• Line Disconnection Detection : Automatically detects and displays line disconnection during measurement.

• Material Burial Detection : Automatically detects and displays entrapment of the weighted probe during measurement.

• Four operation modes: timed start, manual start, smart start, and external start.

• Smart Start Mode : Gradually increases detection frequency as the probe travel distance shortens.

• Zero-point retraction setting to prevent probe damage at empty tank measurement.

• Built-in feed protection switch to reduce entrapment risks.

• Maximum measurement distance up to 30 meters.

• Equipped with RS485 communication interface.

• Multiple weight probe specifications available for selection.

Model: SE020 (MAC-020) Power Supply

Input Voltage: 220VAC ±15% , 50/60Hz , 110VAC (optional)

Power Consumption: 6W

Display: Dual LED Displays , Range 0~9999

Display Panel: 2 Warning Indicator Lights and 5 Function Indicator Lights

Output: 4~20mA, Loop Impedance ≤600Ω, Accuracy ±0.3%

Relay Output: 2 SPDT , 3A/250V

Operating Temperature: 0~55℃

Ingress Protection Rating: IP54

Dimensions: 146 x 222 x 75 mm

Material: ABS

Mounting Hole Dimensions: 115.6 x 210 mm / Φ4.5 x 4 Holes