APOLLO 04-21-21010 CAN Slope Meter 80797525 Paver Leveling Sensor for Asphalt Screed Control

This CAN slope meter sensor is a direct-fit replacement unit for asphalt paver screed leveling systems, referenced by part numbers 04-21-21010 and 80797525. It measures the transverse and longitudinal inclination of the screed in real time and reports the value to the paver control unit over a CAN bus link, allowing the operator to hold grade and cross-slope within tight tolerances across the full paving width.

• Dual part number coverage – one unit serves as the replacement for 04-21-21010 and 80797525, simplifying stock planning for mixed paver fleets.
• True CAN bus communication – digital output is transmitted to the machine controller without analogue drift, so the screed reacts to slope changes immediately.
• Fine resolution – slope resolution of 0.01° supports thin-lift and final-surface work where small deviations become visible joints.
• Temperature compensated – internal compensation keeps readings stable when the sensor body heats up next to hot asphalt.
• Sealed die-cast housing – IP67 protection against dust, spray and wash-down, with a vibration-tolerant internal mounting.
• Fast field replacement – identical mounting footprint and 7-pin connector allow a swap during a short paving window.

The sensor uses a gravity-referenced sensing element that converts inclination into a digital angle value. A microcontroller linearises the signal, applies temperature compensation and streams the result to the paver ECM through the CAN interface at a fixed refresh rate. Because the value is transmitted digitally, cable length and connector contact resistance no longer affect accuracy, which is the main weakness of analogue slope meters on older machines.

The measured slope is compared by the machine controller against the target cross-slope set on the operator panel. Any difference produces a correction command to the screed lift cylinders, closing the loop automatically while paving continues.

Remove the failed unit from the screed mounting bracket, keep the existing harness and mounting hardware, and seat the new sensor in the same orientation. Tighten the fixing bolts evenly so the housing is not distorted, then reconnect the 7-pin CAN plug until the lock tab engages.

After power-up, run the leveling system through its zero/slope calibration routine on a known level surface. Confirm that the displayed cross-slope tracks the reference value without oscillation before resuming production paving. If the machine reports a communication error, check the CAN termination resistor and plug pin condition first; the sensor itself is polarity protected and will not be damaged by a reversed supply.

Each sensor is wrapped in anti-static foam, boxed with a shock-proof insert and packed in an export-grade carton suitable for air and sea freight. Stock items are dispatched within 7 to 10 working days; larger fleet orders are scheduled on confirmation. Units are tested before packing and arrive ready for direct installation.

The CAN slope meter sensor 04-21-21010 / 80797525 keeps paver leveling accurate, responds instantly to grade changes and survives the heat and vibration of daily paving work. For contractors maintaining mixed paver fleets, one part number covers both references and reduces both downtime and inventory complexity.

Send us your machine model, quantity and destination port and we will confirm price, lead time and shipping cost the same working day.