The MEC Medical Ltd Terminal Units are designed to fully comply with the requirements of European Standards BS EN ISO 9170-1. MEC Terminal Units can be either surface flush or trunking mounted. Features integral to the units include: Non- interchange ability between probes, socket assemblies and terminal blocks as well as quick release of the probe with single handed operation. The Units incorporate a secondary valve, which facilitates ease of maintenance without interruption of the gas supply to the unit.