S-3A/I and S-3A/II

 Oxygen Analyzers

 

Introduction

The Applied Electrochemistry Model S-3A Oxygen Analyzer continuously measures the concentration of oxygen. There are two models: The S-3A/I Single-Channel Analyzer and the S-3A/II Dual-Channel Analyzer. Both instruments feature the same high accuracy, rapid response, and fine sensitivity. 

Features:

  • High accuracy at all oxygen concentrations
  • Rapid response-ideal for accurate breath-by-breath measurements
  • High sensitivity plus exceptional stability—capable of detecting changes of 0.001% oxygen at air composition
  • Solid ceramic oxide sensing element for long term maintenance-free operation
  • Single gas calibration (room air may be used)

The Gold Standard in laboratory oxygen analysis for over 30 years, worldwide.

Capabilities

A complete Model S-3A consists of a sensor, readout/control unit, and cable. When the sample gas is passed through the sensor, a voltage that is a function of the oxygen concentration of the gas is generated. This voltage is fed to the readout/control unit via a connecting cable.

The optional R-1 (Single Channel) or R-2 (Dual Channel) Flow Control Unit can be used to draw the sample through the sensor. Each flow control unit contains a pump, a needle valve, and a flowmeter for each channel. Other gas handling equipment can be used if preferred.

 

 

Model R-1 Flow Control

[Optional]

 

 

Specifications

Speed of Response:
100 milliseconds to 90% of final value for a step change in oxygen concentration.

Accuracy:
±0.01% O2 on the %O2 scale, equivalent accuracy on other scales, within working range

Working Range:
Calibration gas value ±5% of full scale value

Stability:
±0.01% oxygen in 24 hours with constant temperature and pressure

Sensitivity:
±0.001% oxygen or equivalent on other scales

Resolution:
Digital Display: ±0.01 on each scale

Analog Output:
0-5V buffered output for 0-100% O2

Sample Flow Rate:
10-300 ml/min, 50-125 ml/min recommended for most applications; for other flows, consult the factory

Flow Dependence:
±0.02% O2 at flow rates of 50-125 ml/min, calibrated at 20.61% O2 and 95 ml/min

Additional Specifications for Model S-3A/II, Channel ∆ (1-2)

Accuracy:
±0.003% O2

Stability:
±0.003 in any 4 hour period

Resolution:
±0.001 on the digital display

Analog Outputs:
Buffered analog output of 0-10V for 0-100% O2 on channels 1 and 2; 0 to ±10V for 0 to ±10% O2 on channel ∆ (1-2)

 

 

 

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