The HI97105-11 CAL Check™ standards allow users to validate the instrument performance at any time by following the on-screen, step-by-step calibration process. The CAL Check standard vials are developed to simulate a specific absorbance value at each wavelength to verify the accuracy of subsequent readings with a cuvette for zeroing the meter and another to validate or calibrate.  This high-quality set of standards is supplied with a certificate of analysis that provides the lot number, reference values, and expiration date. 

• Light-tight storage containers
• NIST traceable standard
• Marked with expiration date and lot number for traceability