The AE8 series oxygen analyzers

Oxygen analyzers AE8 series are intended for determination of the absolute oxygen content in the flue gases or other mixtures of gases in the industry. Absolute content of residual oxygen in gases released during the combustion or chemical processesis one of the most important indicators to control the process. The oxygen content value helps to reach optimal heating efficiency and minimize environmental pollution.

Basic description

AE8 oxygen analyzers offer the modular solution for demanding applications, not only for the measurement of flue gases but also in the chemical industry. The basic measurement element is the solid electrolyte ZrO sensor placed inside the technology in the flow of analyzed combustion products. Probes for gas temperature up to 600°C have a ceramic casing for sensors equipped with heating element, the high temperature probes are heated to the working temperature directly by the measured gases. The protective and supporting stainless steel cover attached to the mounting flange passes through the wall of the ducting.

The control box is connected by wiring with the probe cover. The box contains all the electronics and also other equipment necessary for the device operation. The reference air filter, cable bushings and the calibration gas input are located at the bottom face of the box. The calibration is possible up to four points (air + 3 calibration gases) and can be handled without analyzer dismounting.

The AE8 oxygen analyzers can be delivered with several extensions like the automatic calibration unit or individual make of probe according to each special application.

Advantages

  • User-friendly operation
  • Further extensions possible, modular design
  • Easy mounting and dismounting of probe
  • Low operation costs
  • Measurement in the flue gas stream, no need of sampling equipment
  • Easy installation and setup
  • Immediate response to the oxygen content change
  • Simple semiautomatic calibration
  • Easy replacement of the measuring sensor and a basic calibration

Analyzer’s functions

  • Online displaying of measured values
  • Error state signaling
  • Probe wear-out measurement
  • Calibration can be handled without analyzer dismounting
  • Semiautomatic calibration up to 4 points
  • Extension for the automatic calibration possible
  • Measurement of reference air flow
  • Possibility of remote controlling using the ModBus protocol

System configuration

Basic technical data

Power supply230 V, 50 Hz
Protection outside the boilerIP65
Power inputmax. 150 VA
Measurement range0 - 21% O2
O2 change response timestandard1 sec.
O2 measurement accuracy± 0,1% O2
Assembly flange ambient temperature (outside the boiler)-10°C to +80°C
Control box ambient temperature
(operational)
-20°C to +55°C
Flue gases temperaturemax. 600°C or 700°C to 1000°C
Max. underpressure or overpressure of the measured environment4 kPa
OutputsCurrent 4-20 mA, Modbus RTU (RS485), measurement validity ( relay dry contact)
Probe length*350 mm, 500 mm, 1200 mm
Device box size (WxHxD)standard 300 x 300 x 150 mm
* Other options on request

Serie AE8 – overview

Type/Obj.n.ProbeType of constructionDescription
AE811350 mmBasic (max 600°C)Analyzer with calibration
gas input and 350 mm probe
AE812500 mmBasic (max 600°C)Analyzer with calibration gas input and 500 mm probe
AE8131200 mmBasic (max 600°C)Analyzer with calibration gas input and 1200 mm probe
AE821350 mmUnheated probe
700°C - 1000°C
Analyzer with calibration gas input and 350 mm probe
AE822500 mmUnheated probe
700°C - 1000°C
Analyzer with calibration gas input and 500 mm probe
AE8231200 mmUnheated probe
700°C - 1000°C
Analyzer with calibration gas input and 350 mm probe

 

 

Sensor cover with filter can be simply removed to change the sensor

Examples of applications

Power and heating industry
Continuous measurement of oxygen and its subsequent regulation to
optimum value guarantees decrease of amount of fuel and emissions

Incineration plants
Controlled burning of waste increases efficiency
of the process and helps to reduce emissions.

Production of iron and steel
Regulating the content of oxygen in the blasting air increases
the productivity of blast furnace production.

Annealing furnaces
Control of the atmosphere in the annealing and tempering
of metal products, it is important in terms of surface quality.

Production of ceramics
Monitoring the oxygen content, transition to reduction combustion
in a certain phases of firing and its control guarantees quality
of ceramic products.

Glass production
Monitoring of oxygen content is important in viewpoint
of technology, energy savings and reduction of emissions.

Lime plants
Monitoring of oxygen content is important for quality of the final product.

Chemical industry
Optimization of parameters in chemical processes, monitoring
of gaseous mixture of against explosion and inflammation.

On request it is possible to offer solutions for special applications, such as:

  • gas temperature higher than 1000°C
  • measurement inside the ceramic kilns
  • measurement in chemical industry
  • special mechanical implementation