Futaba - SBS-01RO Optical RPM Sensor

This is the Futaba RPM Sensor (Optical type)                  
                        For Futaba telemetry systems                           
                                                                               
FEATURES: Compatible with the Futaba 18MC-WC, 18MZ, 18SZ, 14SG, 10J, 6K,       
          This sensor, when used in conjunction with a telemetry-enabled       
             radio system, is used to indicate the rotation speed of a         
             propeller, rotor, or other component. Nothing needs to be         
             attached to the component since the sensor uses available         
             light reflected off that component.                               
                                                                               
INCLUDES: One RPM sensor with attached cable                                   
          One plastic mounting bracket                                         
          Two pieces of double-sided foam tape                                 
          One instruction sheet                                                
          One warranty sheet                                                   
                                                                               
REQUIRES: Connection to S.BUS 2 system                                         
                                                                               
SPECS:    Weight:                   4.9g (0.173oz)                             
          Voltage:                  3.7 to 7.4 VDC                             
          Range:                    360 to 300,000 RPM/Fin(s)                  
          Sensor, length, overall:  6-1/4" (160mm)                             
                  width:            28mm   (1-1/8")                            
                  height:           13mm   (1/2")                              
          Mounting bracket, length: 34mm   (1-3/8")                            
                            width:  26mm   (1")                                
                            height: 12mm   (1/2")                              
          Foam tape, length:        22mm   (7/8")                              
                     width:         22mm   (7/8")                              
                     thickness:     1.3mm  (1/8")                              
                                                                               
COMMENTS: This sensor will only work with S.BUS 2-compatible devices.          
                                                                               
          Helicopters: Because of the large rotor diameter, use of this sensor 
             on a helicopter is not recommended. A magnetic sensor, such as the
             Futaba Magnetic RPM Sensor 18MZ (FUTM0852) is suggested.          
                                                                               
          Brightness: Adequate light is needed for this sensor to operate      
             properly. Conditions such as dusk, dawn, clouds, indoor           
             operation, poor angle-of-reflection off of propellor or fin, etc.,
             will result in a measurement of 0 RPM.                            
                                                                               
          Installation: It is recommended that the sensor be mounted at or     
             less than 150mm (6") from the object whose rotation speed is      
             being measured. The closer to the object the sensor is mounted,   
             the more reliable the measurements will be.                       
                                                                               
          Set-up: The default slot number for this device is 2. Information on 
             changing the slot number can be found in the transmitter manual.  
             This device also has a default S.BUS 2 ID number which will need  
             to be changed if more than one SBS-01RO sensore is attached to the
             same S.BUS network. The default ID number can be found on the     
             side of the unit.                                                 
                                                                               
          Number of blades/fins: The number of blades on the object whose      
             RPM is being measured is two. If the object has more blades or    
             fins, please consult your transmitter manual for information on   
             changing this number.