Customer Services (858) 578-7887 & (888) GO IN
TEC
IN
TEC
Controls, 12700 Stowe Dr., Suite 110, Poway, CA 92064
Fax (858) 578-4633 & (888) FX IN
TEC
www.inteccontrols.com
Specification subject to change without notice.
Printed in USA 150109
Polygard® is a registered trademark of MSR
AT-1195_V3_UserManual
PolyGard
®
O
2
Transmitter
User Manual - AT-1195 V3
Page 03
Electrochemical Oxygen Transmitter
1 General Overview
The PolyGard
O
2
gas transmitter AT-1195 with digital processing of the measuring values and temperature
compensation is used for the continuous monitoring of the ambient air to detect the presence of oxygen
concentrations. Main application ranges are laboratories, food production etc. where changes of the oxygen
concentrations might be possible.
The AT-1195 V3 transmitter is equipped with an analog output where the signal can be selected as current signal 4-
20 mA or as voltage signal 2-10 V. In the 4-20 mA mode the transmitter also works in the 2-wire technique.
The intended sites are all areas being directly connected to the public low voltage supply, e.g. residential,
commercial and industrial ranges as well as small enterprises.
The PolyGard
®
O
2
analog transmitter must not be used in potentially explosive atmospheres.
2 Functional Description
2.1 Control Mode
Analog mode:
The analog output can be selected as current signal with 4-20 mA or as voltage signal 2-10 V. In the 4-20 mA mode
and without any supplementary options, the AT-1195 V3 also works in the 2-wire technique.
2.2 Sensor
The chemical process of the measurement is based on the principle of a galvanic micro-fuel cell. The gas or the
ambient air to be monitored diffuses through a membrane filter into the measuring cell towards the cathode.
Cathode and anode are electrically contacted, therefore due to the oxidation there is an electric current proportional
to the oxygen partial pressure. This current signal is linear to the oxygen concentration. The current is evaluated by
the connected amplifier and transformed into a linear output signal.
The diffusion through the membrane and the thin electrolytic coat are complex, temperature dependant,
electrochemical processes influencing the ion current of the sensor. Therefore the sensor is temperature-
compensated within the specified temperature range.
The electrolyte, the catholyte and the composition of the anode are in a way that the oxygen diffusing towards the
cathode is electrochemically reduced.
The electrolyte is used up by the electrochemical process. So the sensor life time is limited to two years. Calibration
during sensor life time is not necessary.
Caution:
There is a small quantity of corrosive liquid in the sensor element. If in case of damage persons or
objects touch the liquid, you have to clean the affected areas as fast and carefully as possible with tap water.
Out of use sensors must be disposed in the same way as batteries.
Specifications subject to change without notice. | USA 150109 | Page 3 of 13
12700 Stowe Drive, Suite 100, Poway, CA 92064 | Ph: (858) 578.7887 & (888) GO.IN
TEC
| relevantsolutions.com/inteccontrols
AT-1195_V3 – UserManual
Polygard® is a registered trademark of MSR | AT-1195_V3_UserManual
Specifications subject to change without notice. | USA 160104 | Page 3 of 13
12700 Stowe Drive, Suite 100, Poway, CA 92064 | Ph: (858) 578.7887 & (888) GO.IN
TEC
| relevantsolutions.com/inteccontrols
AT-1195 V3 – UserManual
PolyGard
®
is a registered trademark of MSR-Electronic GmbH | AT-1195_V3_UserManual
INTEC Controls | 12700 Stowe Drive, Suite 100, Poway, CA 92064 | Ph: (858) 578.7887 & (888) GO.INTEC | inteccontrols.com
Specifications subject to change without notice. | USA 200211 | Page 3 of 13
AT-1195 V3 – UserManual
