> G-28R , G-28N , G-28P , G-28N-NC 1) Reed Switch : 5~240 DC/AC     - Reed Switch 2 wire type 2) NPN Current : 5~30V DC - Solid state type,Current sinking (NPN output) 3) PNP Current Sourcing : 5~30V DC - Solid state type, Current sourcing (PNP output) 4) NPN Current Sinking : 5~30V DC