Instrotech News & Articles
KOBOLD floats to the top
KOBOLD has on offer their M-series magnetic level switch comprising a float, which slides up and down with the liquid along a guide tube.
That means that up to 4 reed contacts, moulded into the guide tube, are switched in a non-contact mode by a ring magnet encapsulated within the float. The hermetically sealed contacts are available as ‘normally closed’, ‘normally open’ or ‘changeover’ contacts. Thus, many simple tasks such as automatic signaling of empty/full tanks and automatic tank filling can be performed by a control relay.
Magnetic level switches are manufactured to customers’ specifications, in brass, stainless steel, PP, PVC, NBR and PVDF, ensuring measurement of most media. The maximum medium temperature is 150°C and the maximum pressure is up to 100bar. Guide tube lengths can vary from 40mm to 6000mm, and can be installed on top of a vessel top with a flange or thread connection. Where top-installation is not possible, Kobold’s alternative model MS switch, suitable for side mounting, is recommended and operates in exactly the same way as Kobold M.
Depending on the float type, these level switches can be used for mediums having density as low as 0.5kg/dm³. The design is compact, with small float diameters (starting from 18mm) allowing for installation of these switches in containers with limited space.
For use in hazardous areas, the switches are also available with ATEX certification according to Ex II 1GD Ex ia IIC T6 Ga/ Ex ia IIIC T85 °C
Da -20 < Ta < +60 °C.