MAHR, 0 in to 4 in/0 to 100 mm Range, IP67, Blade-Style Digital Depth Gauge - 446F25|4126532 - Grainger
Portable Water Depth Sounder Gauge from Cole-Parmer
Amazon.com: Tire Tread Depth Gauge, Preciva LCD Digital Tire Tread Depth Gauge Tool with Inch and MM Conversion of 0-0.98 Inches(NO Fraction Display/NO 32nds). : Automotive
Suunto SM-16 Depth Gauge 70 for Combos
Mitutoyo 7218S Dial Type Depth Gauge 0-8" - All Metrology from H Roberts & Sons DI Ltd UK
Depthmate Portable Sounder Floating Electronic Depth Meter – House of Scuba
Digital Tread Depth Gauge
2'' 52mm Waterproof Depth Gauge Digital Depth Meter for Marine Boat Yacht 9-32V | eBay