The Pentax AP-224 surveying levels are compact and lightweight, each weighing only 2.8 lbs (1.25 kg) for ease of use in the field. They are built to withstand rugged conditions, including light rain and dust, thanks to their water-resistant construction. The levels feature a built-in magnetic-dampened automatic compensator that ensures the line of sight remains level, with a compensation working range of ±15'.