Paddle Trimming Calculator

Pipe inside diameter (ID) in millimetres
Flow rate in litres per minute
Paddle length in millimetres
Paddle width in millimetres (maximum 27mm)
Velocity in meters per second
ANSWER (Force in Grams)PRODUCT
F25, F27, F28, F40 & F30 Series
F20, F21, F29, F60
TW Series

Too Low Flow will not actuate the switch
Correct Correct flow range to actuate the switch
Too High More force than is recommended

To use this calculator, just fill in the required information in the grey value boxes. Answers to the appropriate product
are given under “Answer”. Suitability to the combination of pipe size, flow, paddle length / width will be indicated by
colour and a number, this number is in grams force. All answers assume the switches sensitivity adjustment is wound out
to most sensitive.