Flow cell and concentration measuring device
Provided is a concentration measuring device which includes: a main pipe through which a fluid whose concentration is to be measured flows; a flow cell having a fluid passage and a light passage formed to pass through the fluid passage; a spectrometer capable of measuring absorbance for each wavelength of the source light transmitted to the flow cell and the received light receiving from the flow cell; and an optical cable connecting the flow cell and the spectrometer with each other, wherein the flow cell is separated from the main pipe to be provided separately, and a fluid pipe is connected to the flow cell, so that the fluid flows from the main pipe to the flow cell through the fluid pipe using a pitot tube.
1 . A flow cell comprising:
a body having a fluid passage and a light passage formed to pass through the fluid passage;
an optical cable connected to the body to transmit source light from a spectrometer to the body and to transmit receiving light from the body to the spectrometer;
a mirror lens body provided on both sides of the fluid passage to diffuse and condense light;
a window provided on both sides of the fluid passage and inserted into the light passage to transmit light; and
a lens bushing fixing each window to the body and connected to each mirror lens body,
wherein a source light cable and a light receiving cable are arranged to be side by side with each other by being connected in a same direction with respect to the body, and
wherein O-rings are provided to seal between the fluid passage and the light passage.
2 . The flow cell according to claim 1 , wherein the window provided on both sides of the fluid passage comprises a first window and a second window, the O-rings comprise a first O-ring and a second O-ring, the first O-ring is disposed outside the first window based on the fluid passage, and the second O-ring is disposed outside the second window based on the fluid passage.
3 . The flow cell according to claim 2 , wherein the body includes a main body, and
wherein a fluid hole, which is the fluid passage, is formed to pass through the main body, and an optical hole, which is the light passage, is formed to pass through the body in an orthogonal direction to the fluid hole.
4 . The flow cell according to claim 3 , wherein
the lens bushing includes a first lens bushing fixing the first window to the body and a second lens bushing fixing the second window to the body, and
wherein a first inclined taper is formed at an end of the first lens bushing facing the first window to press the first O-ring, and a second inclined taper is formed at an end of the second lens bushing facing the second window to press the second O-ring.
5 . The flow cell according to claim 3 , wherein a stepped portion supporting the first window protrudes from an inner circumferential surface of the optical hole.
6 . The flow cell according to claim 3 , wherein the fluid hole and the optical hole are in direct communication with each other while crossing each other.
7 . The flow cell according to claim 6 , wherein the first window faces the second window, the first window directly faces the fluid hole, and the second window directly faces the fluid hole.
8 . The flow cell according to claim 3 , wherein the mirror lens body is provided on both sides of the main body in a penetration direction of the optical hole, and
wherein an accommodation groove for accommodating each mirror lens body is formed in the main body.
9 . The flow cell according to claim 8 , wherein the body comprises:
a lower body fastened to a lower portion of a lower accommodation groove of the main body;
an upper body fastened to an upper portion of an upper accommodation groove of the main body; and
a front cover fastened to a front of the lower body, the main body, and the upper body.