M.R.K engineers offers reed magnetic sensor.
Read magnetic means very high speed, contactless switch which is free from mechanical wear & tear, giving highly reliable million operation. They are easy to install and safe for hazardous environment. They can be used as limit switch, float switch, level alarms, proximity sensor, position indicators & electronics counting besides so many more applications you can think of. These are available ac, ac/dc, dc with various voltage, with various sizes and various sensing distance. The two piece devices are available with very compact small sizes.