UNISENSE HYDROGEN SENSOR, User Manual

Page: 9 / 24

9
OVERVIEW
The Unisense hydrogen microsensor is designed for research
applications within physiology, biotechnology, environmental sci-
ences, and related areas .
With the minute tip size, excellent response time, and good sen-
sitivity the Unisense hydrogen sensor facilitates reliable and fast
measurements with a high spatial resolution .
The Unisense hydrogen microsensor is a miniaturized Clark-type
hydrogen sensor with an internal reference electrode and a
sensing anode . The sensor must be connected to a high-sensitivity
picoammeter where the anode is polarized against the internal
reference . Driven by the external partial pressure, hydrogen from
the environment will pass through the sensor tip membrane and
will be oxidized at the platinum anode surface . The picoammeter
converts the resulting oxidation current to a signal .
THIS MANUAL COVERS THE UNI-
SENSE HYDROGEN MICROSENSORS
H
2
10 (tip diameter <20 µm)
H
2
25 (tip diameter 20-30µm)
H
2
50 (tip diameter 40-60µm)
H
2
100 (tip diameter 90-110µm)
H
2
500 (tip diameter ~500µm)
H
2
-MR (for use with microrespiration
chambers MR-Ch)
H
2
-N (Needle type sensor)
H
2
-spec - Customer specified.
Schematic view of a hydrogen sensor with a LEMO plug.
S
e
n
s
o
r
ti
p
LEMO plug
IMPORTANT
Unisense sensors
are neither
intended nor
approved for use in
humans