Profile: Sapphire Technologies specializes in providing digital multimeter, digital clamp meters, non contact thermometers, multi gas detectors, non contact voltage detector, and thermal imagers. We also offer calibrators, vibration testers, insulation tester, and earth testers. Digital multimeter is a test tool used to measure two or more electrical values principally voltage (volts), current (amps) and resistance (ohms). It is a standard diagnostic tool for technicians in the electrical/electronic industries.