The Colorimeter instrument is suitable to determine color of lubricating oils and any other
petroleum products as per the Petrochemical Industry Standard SH/T016892 “Test Methods
for Color of Petroleum Products”.
The determination methods are as follows: Fill petroleum products
sample to be determined into color comparison tube, and then
compare it with standard color sheet to determine it color number.
II.Instrument structure and main characteristics:
The Colorimeter for Oil instrument is composed of standard color dial, observation lens,
light source and color comparing tube.
The light source is a 220 V, 100 W, with temperature of 2750±50 K
grinding milk white light bulb. After filtering color by milk white
glass and sunshine filtering glass, the spectrum characteristics of
light gained from sunshine is similar to it. The standard light
will change into two parallel lights, which is similar in size,
trough plane reflection mirror and prism. The parallel lights will
irradiate on sample in the color comparing tube on the color glass
of standard color dial evenly and respectively.
There are 26 pieces of Φ14 light holes. And standard color glasses
having 1~25 color number are installed in the 25 of these holes in sequence.
The 26 hole is blank. The color dial is rotated by a hand wheel
installed at right side of instrument to choose the correct color
during color comparing test. The standard color comparing glass on
the color dial should be calibrated by standard color comparing
The color comparing tube is Φ32 mm, 120~130 mm high non-colorful flat bottom glass tube. The color
comparing tube is placed into instrument trough a lid on the top of
The observation lens is composed of concave mirror and separated
bar. You can see two semicircles colors through observation lens.
The right semicircle is standard color. The light and focus of
optical observation lens can be adjusted, so it is easy to be used.