Abstract: A workstation cooling unit (12), comprises a heat transfer path adapted to contain a heat transfer fluid, the heat transfer path being adapted for connection to a condenser to form a heat transfer circuit, and a heat exchanger (36) for cooling the workstation (40). In this way, direct cooling of a workstation (40), for example a desk or other work area, can be achieved. The heat transfer fluid may comprise carbon dioxide.

Abstract: Apparatus for detecting the escape of a fluid from a cooling system having a passage (1, 2, 3), comprises: a housing (4, 5) defining a volume abutting one or more portions of said passage; and sensor means (6, 7) adapted to detect the presence of said fluid within said volume; and wherein the housing is adapted to collect the escaped fluid such that the sensor can detect the escaped fluid before the operation of the cooling system is compromised. The passage of the cooling system may be a pipe of a heat exchange circuit, and the fluid may be a heat transfer fluid such as carbon dioxide. The apparatus may be adapted to signal to alarm means or other monitoring systems on detection of escaped fluid.