Product Description; General Information; Principle - Mettler Toledo InSUS H60i Bedienungsanleitung

InSUS H60i
3

Product Description

3�1

General Information

The optical single-use oxygen
sensor head (with integrated temperature probe)
for measurement of oxygen in single-use
The single-use sensors are
sterilizable and are typically integrated in single-use devic-
es such as single-use bags and other similar applications.
Please also refer to the documentation provided by your
single-use device supplier.
3�2

Principle

The optical oxygen sensors are based on an optical detec-
tion method:
mary of the principle. In contrast to the polarographic
Clark-electrode, which detects a redox reaction of oxygen
at the electrode, the optical method is based on an energy
transfer between a chromophore and oxygen.
• A chromophore, embedded in the sensor is illuminated
with blue light. This chromophore absorbs the energy
and if no oxygen is present emits red fluorescence light
with a specific lifetime. This emitted light is being detect-
ed by a detector in the sensor head.
• In the presence of oxygen, the chromophore transfers the
energy to the oxygen molecule. Oxygen is then able to
transfer this energy as heat to the surrounding area and
no fluorescence is emitted.
• The total intensity of the fluorescence and the lifetime of
the fluorescence is related to the
in the medium.
• To analyze the lifetime of the fluorescence, the excitation
light is pulsed with a constant frequency, the emitted light
shows the same course but with a time delay to the
excitation. This delay is called Phase shift or Phase an-
gle (Phi). The phase shift is dependent on the oxygen
level and follows the Stern-Vollmer correlation.
• The sensor head detects this phase shift and calculates
the oxygen concentration.
• The oxygen value
head
© 09 / 2022 METTLER TOLEDO
Printed in Switzerland
fluorescence quenching. Here is a short sum-
is
to the transmitter.
sensor and
gamma and X-ray
oxygen
digitally transferred from the
the InSUS H60i
are used
process devices.
irradiation
partial pressure
sensor
InSUS H60i
30 802 188 A
7