Keson MP401E Electronic Measuring Wheel – Steel Frame, Digital Counter The Keson MP401E is a heavy-duty electronic measuring wheel built on a rugged steel frame, delivering unmatched durability and precision in demanding field conditions. Designed as Keson’s most robust electronic wheel, it features a protected, easy-to-read backlit LCD display that remains visible in low-light environments. The counter is strategically positioned to minimize impact risk, with additional protection from the frame and roll bar during transport and use. Engineered for accuracy and reliability, the MP401E uses a magnetic sensor input system to eliminate errors caused by dust and debris—common issues with optical systems. The sealed counter housing meets NEMA Class III standards for weather resistance, allowing the unit to withstand rain and harsh jobsite conditions. With advanced functions including area calculation, memory, and multiple unit modes, this wheel is built for professional-grade performance. Key Features • Electronic measuring wheel with backlit 7-digit LCD display • Steel frame construction for maximum durability • Magnetic sensor system for reliable, debris-resistant accuracy • Sealed counter housing (NEMA Class III) for weather resistance • Swan-neck ergonomic handle for improved comfort and control • Measures up to 99,999 ft (or metric equivalent) with multiple unit modes • Advanced functions including area calculation, memory, and continuous measurement Ideal For Surveyors, contractors, and engineers who require a high-precision electronic measuring wheel with advanced functionality and rugged construction for use in harsh field environments.