Sensor's explained in details
Find under subject seen at left a fair amount of general information, some product leaflet, some manuals from various suppliers of relevant sensors.
How to tighten a sensor correct !
We strongly recommend that any threaded PG 13,5 sensor is tighten with max 1 Nm into any SUB or SUF head plate. Same rules for CerCell products as well as for other brands.
Use your fingers if you are a man and the little CerCell spanner tool if you are a woman! We are dealing with plastics and not stainless steel! It's only an O-ring that needs to be compressed slightly. Its not the wheel on a vehicle you need to fasten!
Well, we have seen several really bad uses of hand tools. Not correctly chosen tools will for sure both over-tighten and destroy the sensor as well as the bioreactor ….. so take your time! Never use the tools seen below!