Apera portable turbidity meters now offer you a choice of light source in your meter. Choose from either LED light source (ISO 7027 compliant) or tungsten lamp light source (USEPA 180.1 compliant). The new TN480 and TN500 models also have data logging capability with TruRead measurement mode. This feature displays max/min values and calculation of averages for higher accuracy and stability of turbidity measurements.
