ISO 9170-2:2008 specifies the requirements and dimensions for terminal units intended for use in anaesthetic gas scavenging disposal systems in accordance with ISO 7396-2.

ISO 9170-2:2008 specifies two types of terminal unit according to whether the power device is upstream or downstream of the terminal unit.

ISO 9170-2:2008 also specifies requirements and dimensions for the mating counterpart (probe) of the type-specific connection point which is part of the terminal unit.