I specially ordered a mechanical measuring wheel to keep it simple. I've observed battery powered gauges in the past, they seem to change readings at times, no need to fiddle with batteries. The big wheel worked for my project which was on a very uneven farm, grass, pasture.
π Komelon ML1810 Hi-Viz Yellow Measuring Wheel - 6-Inch Accuracy for Feet
8 Review
π ROLATAPE RT204 Dual 4-inch Measuring Wheel: Accurate and Efficient Yellow Survey Tool
7 Review
Komelon ML1212 Meter Man 4 Inch Measuring
8 Review
π Yellow 12.5-Inch Aluminum Measuring Wheel (Ft/In) by Rolatape RT312
8 Review
Triangle Group TR918 225/45 R18 95V summer
61 Review
Kapro - 353 Professional Ledge-It Try & Mitre Square - For Leveling And Measuring - Features Stainless Steel Blade, Retractable Ledge, And Etched Ruler Markings - 12 Inch
23 Review
π² Johnson RAS-1B Johnny Square: Professional Aluminum Rafter Square, 7'', Silver - Top Quality with 1 Square
8 Review
π CAMWAY 6 Inch Digital Caliper with LCD Display, Electronic Vernier Caliper, 150mm Stainless Steel Feeler Gauge, Plastic Digital Caliper Set for Zero Setting Inside/Outside Diameter, Depth, and Step Measurement Tool
3 Review