Spectrophotometer

COLOR SPECTROPHOTOMETER Name of the equipment

Spectrophotometer

Brand

KONICA MINOLTA

Description

The CM-5 bench-top spectrophotometer is a user-friendly colour measurement device equipped with a keyboard and colour LCD screen, removing the necessity for a computer. It offers automatic calibration at each start-up, can measure various sample sizes and forms, and includes internal calibration for standard chemical and pharmaceutical indices.

Specification

Detector	Dual 40-element silicon photodiode arrays
Wavelength range	360nm to 740nm
Wavelength pitch	10 nm
Half bandwidth	Approx. 10nm
Measurement range	0 to 175 % (Reflectance or transmittance); Output/display resolution: 0.01%
Light source	Pulsed xenon lamp
Measurement time	Approx. 1 s (to data display/output); Minimum measurement interval: Approx. 3 s
Repeatability	Spectral reflectance: Standard deviation within 0.1% (400 nm to 740 nm)
Pass/fail judgment	Tolerances can be set to colorimetric values (except Munsell), color-difference values, or reflectance index values
Storable data	Measurement data: 4,000 measurements; Target color data: 1,000 measurements
USB memory stick* storage	Storage of measurement data and target color data. Storage/reading of measurement condition settings
	* Security-enabled USB memory sticks cannot be used.

Applications

Measures a variety of samples	Optional Petri dish accessory enables measurement of pellets, granules, powders, chunky samples, pastes, and opaque liquids.
Large transmittance chamber	A large transmittance chamber with no sides is revealed by sliding open the unit, so even large sample sheets up to 60mm thick can be inserted and measured
Liquid measurements using cells	To measure liquids with optional cells, lengths 2mm, 10mm, and 20mm to measure different densities

Contact information

Dr Siu Ka Chai

TU305

ka-chai.siu@polyu.edu.hk