The phrase "avoid direct contact between" is correct and usable in written English.
It can be used in contexts where you want to recommend or instruct someone to keep a distance or prevent interaction between two entities.
Example: "To ensure safety, please avoid direct contact between the chemicals and any open flame."
Alternatives: "prevent physical interaction between" or "keep a distance between".
(a) Small rubber spacers are placed in each corner of a 6-well plate to avoid direct contact between membrane and lid.
It may therefore undergo cavitation and this feature opens the perspective to design sono-reactors which avoid direct contact between the working liquid and the sonotrode.
The lowered adhesion and friction force were attributed to two factors including (1) the reduced real area of contact between DLC films and colloidal tip; (2) incorporation of thin ILs films to avoid direct contact between DLC films and colloidal tip, which facilitating the sliding of colloidal tip on DLC films.
Importantly, human HGMS applications require special design modifications as, in contrast to conventional use where magnetic elements are permanently imbedded within the separation chambers, medical separators need to avoid direct contact between the magnetic materials and blood to reduce the risk of blood clotting and to facilitate convenient and safe treatment access for many individuals.
An improved design creates a bump shape to avoid direct contact between the cast and the underlying skin.
This sensor device was hermetically filled with wax as a transmitter (Goessl and Pfaff) to avoid direct contact between the sensor surface and the cement.
The problem is that avoiding direct contact between the police and demonstrators may lead to "a more aggressive form of confrontation," Professor Waddington said.
A metal oxide is used to transport oxygen from air to the fuel, thus avoiding direct contact between fuel and air.
The combined treatment system avoids direct contact between the denitrification reactor and the water to be treated, and minimizes operational problems associated with each separate technique.
Aluminization at 1100 °C for 5 h used out-of-the pack procedures avoiding direct contact between samples and the pack mixture.
Chemical-looping combustion (CLC) is a combustion technology where an oxygen carrier is used to transfer oxygen from the combustion air to the fuel, avoiding direct contact between air and fuel.
