Profile: Protrol Instrumentation Ltd. specializes in calibration, sales, hire and repair of instrumentation and associated equipment. The types of instruments we calibrate are low resistance ohmeters, cable fault & location, clampmeters, combustion analysers, current injection sets, disturbance analysers, earth testers, flash testers, gas detectors, insulation testers, light meters, loop testers, multimeters, PAT testers, phase testers, power analysers and RCD testers.