APOLLO VGL-3L Ultrasonic Sensor 2567579 2527049 Contactless Grade Control for S2100 S2100-2 Asphalt Paver

APOLLO VGL-3L Ultrasonic Sensor for S2100 S2100-2 Asphalt Paver

The APOLLO VGL-3L is a non-contact grade and slope sensor used on the S2100 and S2100-2 asphalt pavers. Instead of riding on the surface, it scans a reference - a stringline, the edge of an adjacent mat or a kerb - and reports the measured distance and angle to the paver control system, which then adjusts screed height and tilt to hold the design profile.

Two part numbers are used in the field for this unit: 2567579 and 2527049. Both refer to the same green-body VGL-3L sensor, which is why the two numbers appear together on APOLLO documentation and why customers occasionally ask whether they are interchangeable. When ordering, quote whichever number appears on the machine parts list.

Key Features

• Contactless measurement: ultrasonic sensing keeps the unit clear of the hot mat and freshly laid surface, so it does not drag or wear.
• Grade and slope control: continuous distance and angle data feeds the control loop for screed height and tilt correction.
• Material saving: holding thickness to tolerance avoids over-paving, which is where a large share of asphalt waste occurs on long runs.
• Green-body identification: the green housing is the quick visual marker used on site to confirm the correct VGL-3L unit.
• Plug-in replacement: connector and mounting follow the paver layout, so a fitter can swap the sensor during a maintenance window.

Product Specifications

Where the Green Sensor Sits in the Control Chain

Grade control on a paver is a closed loop: sensor, control unit, hydraulic valve, screed. Each element depends on the one before it. A sensor that reads slightly high forces the screed to lift, and the error repeats all the way down the run. That is why the reference setup matters as much as the hardware: the stringline must be tensioned, the beam free of mud, and the sensor mounted at the specified offset before the unit is calibrated.

• Mat drifting in one direction with a stable reference usually points to sensor calibration or a biased reading.
• Erratic corrections with no change at the reference point to signal noise or a damaged connector.
• Readings that stop updating at all indicate a power or communication fault at the sensor.

Ordering Information

Please confirm the machine model (S2100 or S2100-2) and the part number (2567579 or 2527049) when sending an inquiry. Single piece orders are accepted. Photos of the original sensor, including the connector and label, are welcome and will be checked against stock before shipment. Contact our sales team for current pricing and lead time.