Spectrophotometer Calibration Standard Set with NIST traceability certificate

The P4220 Spectronic Standards Set 2 is a certified, NIST traceable standards set used for performance verification of certain UV-Visible spectrophotometers, and may also be suitable for performance verification of other UV-Visible spectrophotometer makes and models. The Spectronic Standards Set is manufactured by Thermo Fisher Scientific.

The P4220 Set contains one NIST traceable wavelength accuracy standard with three absorbance peaks, four NIST-traceable photometric standards, and two manufacturer certified SRE filters.

The set is used to verify two key performance aspects when used in the application of dosimetry:

• Photometric Accuracy: the agreement between the measured absorbance value of a standard and the true value of the absorbance of the standard. Photometric accuracy is the most direct measurement of whether your spectrophotometer delivers the right answer, and is measured by recording the absorbance of a calibrated standard at a specific certified wavelength, then comparing the measured value to the calibrated value.
• Wavelength Accuracy: the agreement between the wavelength value reported by the instrument to the actual value. Wavelength accuracy is measured by scanning a calibrated standard, with absorbance peaks at certified wavelengths, and comparing the measured peak absorbance value to the certified absorbance value for the standard.