Profile: Caprock Developments Inc. provides specialty replacement lamps & bulbs, hand-held magnifiers & microscopes, thickness gages and other measuring instruments. We supply lamps for all makes & models of UV ovens, conveyors, chambers and guns in arc lengths up to 146 inches, with standard mercury doping, as well as iron & gallium. The HI98103 Checker-1 pH meter measures a full scale pH of 0.00 - 14.00, and is water resistant. It has 2 point calibration, and a resolution 0.01 pH.