HT3000 pages

ZIRCONIA BASED OXYGEN ANALYSER
FOR HIGH TEMPERATURE (500-1600°C)
MOD. HT300

In situ mounting

No calibration for drift needed

High response time

Suitable for dusty processes

Resistant to hostile atmosphere

Advanced transmitter

Excellent stability
This analyzer, based on an yttria stabilized zirconia cell, is an excellent solution for oxygen measurement in the combustion
chamber at high temperature. In that situation oxygen measurement is not influenced by the outside air that penetrates
between the combustion chamber and the exit of the flue gas in the atmosphere. The analyzer, whose probe is not equipped
with any electric heater, can be used in processes with temperature within 500 and 1600°C. The probe can be used in very
dusty combustions (fluid bed) ensuring a fast response time. The compensation of the zirconia cell output to the temperature
of the electrodes, measured by the platinum thermocouple, makes the analyzer free from both zero and span drift. Specific
tests demonstrated stability within 0.1% over 12 months.
The competitive price is compatible with the instrument high performances and quality thanks to its simple design.
The instrument is composed by the probe that is the measuring element (three lengths available), the microprocessor based
transmitter and the flow-meter box. Thanks to our long experience in using this type of analyzer in different types of plants,
we can propose suitable solutions for the employment of this analyser in very hostile processes. All parts are designed and
produced by Fer Strumenti.
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The probe mod 4153 is compact, resistant and it is equipped with a strong outside pure recristalized alumina tube. The
gas to be analysed gets in contact with the measuring cell by diffusion without any circulation of the flue gas inside the
probe itself.
The probe is mounted directly into the process, using the provided 1” NPT thread or a flange with a central 1” NPT-F
threaded hole. The probe is produced in three different standard lengths: mm. 320, 500, 650 under thread.
Two compression fittings for mm.6x4 tubing are suitable for driving both reference air and gas with a known O2
content to the cell, in order to carry on the accuracy test of the analyzer and operate the calibration.
The probe can be mounted in any position. If possible, vertical from top insertion is recommended.
The H705 converter is a field transmitter that converts electric signals from the zirconia cell and the compensation
thermocouple of the FER oxygen probe mod. 4153 (equipped with a B type thermocouple as standard and S type as an
option). Microprocessor based, connected to an analogue to digital 16 bit converter, it is equipped with a high
brightness led display that continuously visualize the oxygen measurement and the temperature measured by the
compensation thermocouple, the resistance of the cell at high temperature (in order to evaluate the electrode level of