Sigma-K
The Sigma-K (www.sigma-k.de) is a Ceramic plate water bed heater that is suitable for all types of water beds and for every bed there is the right Sigma K heater. Single beds with a high volume water core or double beds with a dual system there is the Sigma K160, for larger water beds with a single mattress there is the K240.
The Sigma K heating system is one of the most energy-friendly, reliable and radiation-poor heating elements on the market and is the only heating system in the world to date, with a TÜV test with GS certification and an expert opinion on radiation poverty. The Domed control unit is clear and easy to use allowing you to set the required temperature of your water bed. One of the biggest advantages we have found with this particular type of heater is that you can often slide the Ceramic plate under the mattress without draining the bed for access. Although a very reliable heater, sometimes the PCB/electronics in the control unit itself goes down but this is very easily changed.
