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Long-term storage caps must be correctly tightened in order to ensure a leak tight seal and maintain sample integrity. Caps can be tightened “finger tight
plus quarter turn” with conventional wrenches /spanners. However, the use of two standard wrenches/spanners can be awkward in field situations
and lead to incorrect positioning of caps and other errors. For example, over tightening of the caps may cause distortion of the PTFE ferrules and a leaking seal.
In severe cases of overtightening the ends of tubes can be ‘crimped’ (stainless steel) or broken (glass). The CapLok™ tool was designed by scientists at INERIS (L'Institut National de l'Environnement Industriel et des Risques, France) , to simplify tube capping/uncapping procedures and minimise risk of errors and is manufactured exclusively
by Markes International.
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