特點：靈敏性調整簡單，受測定物特性和周圍環境的影響極小，可以承受大的塊狀物體的沖擊。

應用：廣泛的應用于粉體（水泥、小麥粉、飼料等等）。粒體(小球狀肥料等等)、塊狀物體（煤炭、石灰石、礦石等等）的測量

選型表    阻旋式物位開關RB型(NOHKEN物位)

Model RB                      Rotating-Paddle Level Sensor for Hecvy duty                        Page.12
Code	Base Model
	Type and Application				Mtg.Size and Maerial			Shaft length	Max.temp.
RB20N	Standard plug mounting				G1			99mm	50℃
RB20F	Standard flange mounting				JIS5K65A(t=5mm),Steel			82mm	50℃
RB21FBV	Shaft extension,3000mm Max.				JIS5K65A(t=5mm),Steel			300mm	50℃
RB21FL	Pipe extension,1000mm Max.				JIS5K65A(t=6mm),304SS			300mm	50℃
RB21FT	Heat proof				JIS5K65A(t=6mm),304SS			132mm	250℃
RB21FLT	Pipe extension with heat proof				JIS5K65A(t=6mm),305SS			300mm	180℃
↓	Code	Supply power
↓	1	100V AC ±5%,50/60Hz
↓	2	110V AC ±5%,50/61Hz
↓	3	120V AC ±5%,50/62Hz
↓	4	200V AC ±5%,50/63Hz
↓	5	220V AC ±5%,50/64Hz
↓	6	240V AC ±5%,50/65Hz
↓	↓	Code	Length of contact part
↓	↓	Null	Standard
↓	↓	□□□□	Specify desired length
↓	↓	↓
RB20N	1		→    RB21N-1