A. A Brief description of the sensing task:

B. Size and shape of object (or condition of 
object) to be sensed: 

C. Spacing or gap between sensed 
objects:

D. Motion of conveying device/machine:
              Continuous         Cyclic

E. Length of time sensed object will remain
 in view of sensor: 
  Considerations:
 Velocity of sensed object:
 Quantity of sensed objects per hour/minute:
 Conveyor/web speed:

F. Sensing Environment: Clean  Slightly dirty
  Dirty  Very Dirty Moist Washdown area

G. Ambient temperature:

H. Preferred Sensing Mode:
    BEAM BREAK
       Reflective Mode
    Considerations:
 Distance between sensor and reflector:
 Distance between sensor and sensed object:
  

     Surface reflectivity of sensed object:
    Shiny   Moderately Shiny   Dull
   Light transmission properties of sensed object:
     Transparent      Translucent    Opaque Opposed Mode
    Considerations:
  Distance between light source and receiver:
   Light Transmission Properties of sensed object:
    Transparent      Translucent    Opaque

BEAM MAKE
  Proximity Mode     or     Convergent
  Considerations:
  Distance between sensed objects and 
  sensors:
  Distance between sensed objects and objects
   and objects in background:
  Color of sensed objects:
  Color of background objects:

  Surface reflectivity of sensed objects:
     Shiny   Moderately Shiny   Dull

  Surface reflectivity of background:
     Shiny   Moderately Shiny   Dull

  Light transmission properties of sensed object:
     Transparent   Translucent   Opaque

I. Power Source: A.C.Voltage    D.C.Voltage

J. Output Requirements:
NPN (sinking) Transistor 
PNP (sourcing) Transistor
Conventional Relay
Solid State A.C. switch (TRIAC)

K. Load  A.C.: Current Voltage
            D.C.: Current Voltage
            PLC: AC: Voltage 
                     Allowable Leakage Current
                   DC: NPN Current(sinking) Transistor
                         PNP Current(sourcing) Transistor