For binary separations up to 1 mL/min with water, buffers, and organic solvents (MeOH, ACN, THF) use the MR40 for UV and MR180 for PDA. For binary separations up to 3 mL/min or with additives like formic acid, acetic acid, etc., use the MR100 (228-45168-45) for UV and the MR180 for PDA. For quaternary separations, binary separations up to 5 mL/min, and any application with TFA, use the MR180 for both UV and PDA. Includes mounting hardware for installation in the CTO-30A. For mounting on the side of a pump or in the CTO-20A/AC, use mounting kit 460-18745-41.