INFORMATION DATA WHEN CHOOSING EQUIPMENT
Level measurement of liquid and bulk
a) Data about the fluid to be measured:
 - what is the fluid and its concentration___________________________________
 - product temperature : min.___________ max.____________
 - pressure range: min.______________ max.______________bar
 - dielectric constant of the product, Er___________
 - product specific gravity:__________________
 - product built-up on probes is likely to occur? Y - N -
 - for liquids only:
viscosity at working temperature:_________centipoise
conductivity:__________________
solidification is possible? Y - N - 
foam is likely to occur? Y - N -
waves on surface? Y - N -
highly volatile? Y - N - 
 - for bulk products only:
dry -  or humed -   ?
high powder -   or coarse pellets -
b) Vessel data:
 - walls material:_________________________________________________________
 - vessel is open  -   or sealed -
 - vessel dimensions:_______________X______________X______mm (attach drawing)
 - filling / discharge nozzles position (attach drawing)
 - fittings available for level device:
flange_____________________
thread_____________________
pipe_______________________
c) Device requirements:
 - mounting position :
side
top
bottom
 - continues level measurement -     or level switch -    ?
 - enclosure protection  IP ___________________or Explosion class____________
 - for continous measurement only:
level range _________mm (attach drawing)
accuracy___________%FS
 - dasplay
               local -
               remote -
 - outputs:
               4-20 mA
               serial 232/485 or Hart/Fieldbus
               limit switches:____________________________
 - for point measurement only:
  number of points:____________________
length from mounting position to switching point:________mm
output type: relay - ; PNP - ; NPN - ; 2 wire AC -
output status in presence of product: NO -, NC - , SPDT -