Chart RecordersControl EnclosuresCurrent Transformers / SwitchesData Loggers, IndicatingData Loggers, MiniatureData Loggers, USBEnclosuresFan Speed ControllersIndicating AnnunciatorsIntrinsically Safe BarriersIsolating TransmittersMotion/Safety SwitchesPanel Meters/IndicatorsParticulate (Dust or Broken Bag) SensorsParticulate (Dust or Broken Bag) TransmittersPortable Hydraulic TestersProcess Alarm Switch ModulesRelaysSignal Conditioning ModulesSignal ConverterSSR MonitorsSwitch TestersTimer BoardsTimersVibration Control Switch Testers Model A-800 Proximity Switch Tester For 2, 3 or 4 Wire DC Switches