1.Not only can split type illuminometer measure current value, maximum value, minimum value and difference value of illumination and temperature,but also hold illumination and temperature data, calculate illuminance integral and averaintegral averaging and record data. 2.Switch illumination unit and(Lux/Fc)temperature unit(/). 3.Two recording modes: automatic stora of illumination data (up to 2000 groups) and manual stora (up to 60 groups). 4.Automatic ran and quick response, measuremwent in environment with insufficient light. 5.Screen backlight for darkroom operation.