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.
Scuddles Measuring Wheel Distance Measurer - 10,000 Feet With 25Ft Tape Measure For Yards And Lawns
16 Review
π ROLATAPE RT204 Dual 4-inch Measuring Wheel: Accurate and Efficient Yellow Survey Tool
7 Review
π Zozen Measuring Wheel with Digital Display and Foldable Feet/Meter - Portable Digital Measure Wheel with Backlit Display, up to 99,999Ft/99,999M. Includes Convenient Cloth Backpack.
7 Review
π Yellow 12.5-Inch Aluminum Measuring Wheel (Ft/In) by Rolatape RT312
8 Review
Kapro 307-08-TMS Try And Mitre Layout And Marking Square With Stainless Steel Blade, 8-Inch Length
18 Review
β Stainless Steel L-Square, Size 3-Inch x 4-Inch, Zona 37-434
8 Review
π Johnson Level and Tool 400EM-S 12-Inch Heavy Duty Metal Combination Square for Professionals, with Inch/Metric Measurements, Silver - 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