Able to detect distance changes as small as 1 mm, Model Q4X covers 25–300 mm range across multiple target colors, materials, and surfaces. Unit can detect objects regardless of target surface reflectivity, including black foam on black plastic or black rubber in front of metal. For use in wet and high-pressure washdown environments, Q4X is constructed with IP69K-rated housing made of FDA-grade stainless steel. Angled 4-digit display enables viewing of readout from multiple advantage points.