Phillips - Respironics 

System One 60 series 

Humidifier + water chamber

  a)  6 pin/socket, Dark lid water tub

b) Series 60 with socket for Heated tube, Dark lid water Tub     

Series 60 humidifiers are interchangeable, heated/ non heated

You can convert your non heated tube to heated

Note: Heated version may need upgraded AC adapter of 80W. contact us for advice.