LM-2 and OP-2 Series Semiconductor Sensors offer four detector choices, a silicon sensor for 400-1064 nm (VIS), a UV-enhanced silicon sensor for 250-400 nm (UV) and a germanium sensor for 800-1800 nm in the infrared (IR). OP-2 sensors function with the LabMax-Pro, LabMax-TOP/TO, FieldMaxII-TOP/TO/P and FieldMate meters. LM-2 sensors were originally designed to function with legacy meters Ultima LabMaster, FieldMaster, and FieldMaster-GS meters (now phased out), and are also directly compatible with LabMax-Pro and LabMax-TOP/TO meters. For compatibility with newer meters, we recommend OP-2 sensors be selected.