October 15, 2026
Paving contractors know that a perfectly smooth asphalt mat depends on one thing above all: reliable, real-time grade control. The new APOLLO 12808143 Upgrade Dual-Ski Ultrasonic Sensor brings a major leap forward for Blaw-Knox S1800, S1900 and S2100 asphalt pavers, replacing aging analog wire-based sensors with a faster, more accurate CAN-bus digital platform.
On highways, airport runways and large-scale paving projects, every millimeter of screed height affects ride quality, material consumption and long-term pavement durability. Traditional wire-rope sensors drift under heat and vibration, forcing operators to constantly compensate. The 12808143 upgrade eliminates that drift by combining a physical ski reference with non-contact ultrasonic measurement, feeding precise data back to the control computer in real time.
| Parameter | Specification |
|---|---|
| Part Number | 12808143 |
| Model Reference | 04-21-10120 |
| Compatible Pavers | Blaw-Knox S1800, S1900, S2100 |
| Sensor Type | Ultrasonic Dual-Ski Probe |
| Communication | CAN-Bus Digital Protocol |
| Operating Voltage | 12V DC |
| Weight | Approximately 1.2 kg |
| Warranty | 12 Months |
Paving crews operate in some of the harshest conditions imaginable. Hot asphalt, airborne dust, constant vibration and unpredictable weather all take a toll on sensitive electronics. The APOLLO 12808143 is engineered to survive this environment, with a sealed, corrosion-resistant housing and strain-relieved connectors that keep the sensor performing shift after shift.
Because the unit is a direct replacement for the original 12808143 balance beam sensor, installation is straightforward. Maintenance teams can swap a worn or drifting sensor in minutes, minimizing downtime and keeping the paver on schedule.
For many contractors, the most compelling argument is economic. Fully replacing an obsolete leveling system can be prohibitively expensive, and original spare parts are increasingly hard to source. The 12808143 upgrade offers an OEM-equivalent fit and improved performance at a fraction of the cost of a complete system overhaul — a practical way to extend the working life of reliable S-series pavers.
The APOLLO 12808143 is available now with a minimum order quantity of one piece, flexible payment terms including T/T, L/C and Western Union, and a typical delivery window of 7 to 10 working days after payment confirmation. Each unit is individually tested and shipped in a foam-padded protective box with a moisture barrier.
Whether you are maintaining a single paver or managing a fleet, upgrading to CAN-bus grade control is one of the highest-return investments you can make in paving quality. Contact our team today to discuss pricing, bulk orders and compatibility with your specific Blaw-Knox models.
