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4 structure of the uv-vis sensor, 4 structure of the uv-vis sensor -3 – YSI CarboVis 705 IQ TS User Manual

Page 7

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CarboVis 70x IQ TS

Overview

1 - 3

ba75950e02

11/2012

1.4

Structure of the UV-VIS sensor

A UV-VIS sensor contains a light source (1), a measuring gap (3) to

enable the contact of light with the measuring solution, and a detector

(5) to measure the attenuated light beam.
The sender of the optical system (2) directs a light beam, the measuring

beam (6), through the measuring solution and a second light beam, the

reference beam (8), over a distance without measuring solution. The

test sample is between both measurement windows (3) in the

measuring gap.
The receiver of the optical system (4) directs the measuring beam and

reference beam to the detector. In the detector, the light is received by

fixed photo diodes.

Fig. 1-2 Structure of a UV-VIS

sensor

1

Light source

2

Sender of the optical system

3

Measuring gap between the measurement windows

4

Receiver of the optical system

5

Detector

6

Measuring beam

7

Reference beam

8

Connection for the optional compressed air cleaning system

7

6

3

4

8

2

1

5

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