Medium temperature shift (MTS) and isothermal shift (ITS) catalysts are becoming more common in use. 

MTS and ITS catalysts are a copper zinc alumina product, similar to the LTS catalyst. However, MTS and ITS catalysts operate at lower steam to carbon ratios. The required catalyst volume is smaller overall due to a single bed system. The MTS and ITS range is a simple self-guarding product, providing good thermal stability and high in-service strength - providing all round reliability.