Product Description Description: Sensors, Proximity Sensor Product Information ResourcesManufacturerKanson Electronics Inc. / ISSCProduct Category SensorsProduct Sub Category Proximity SensorsSeries1221 Series Download DatasheetSeries FeaturesModel 1221 DC limit styleSeries Description: The 1221 is a low cost limit style DC, three wire, proximity switch. When used with the 1262 provides a MSHA approved motion sensing system. Product Videos Custom Field Product Reviews