Part 1 Introduction
1.1
General Introduction
The Southland Sensing OMD-501D Trace Oxygen Analyzer is a microprocessor based online analyzer
designed for continous measurements in a variety of applications and gas mixtures.
The analyzer was designed with the customer in mind keeping the operations simple, while still featur-
ing a fast response and rugged design. Every effort has been made to use modern industrial compo-
nents and materials which has resulted in an advanced design, excellent performance and an overall low
cost of ownership.
Southland Sensing Ltd. appreciates your business and recommends to read through the complete manu-
al to be able to get the full experience from your new oxygen analyzer.
1.2
Principle of Operation - The Oxygen Sensor
The precision electrochemical oxygen sensor used in the OMD-501D is designed and manufactured by
Southland Sensing Ltd under a strict quality proceedure.
To understand how the oxygen analyzer functions, it is important to understand a little bit of the sensor
characteristics.
The active components in the precision electrochemical oxygen sensor is the anode, cathode and aque-
ous electrolyte which is all housed in a cell body. The oxygen molecules in the application pass through
the front sensing membrane. A chemical reaction occurs and a raw electrical current is generated.
This electrical current is proportional to the amount of oxygen in the application. The analyzer than
processes this raw electronic signal, compensates for temperature and barometric pressure variations
and converts the data into a parts-per-million or percent oxygen measurement value.
Once the data is displayed in real time on the full color backlite display, the user can control their pro-
cess using the two fully adjustable alarms with a built in delay feature. or output the analog 4 - 20mA
signal to a PLC or other control system.
Precision Electrochemical Oxygen Sensor
