Analyzers and systems for flue and combustible gas

 

Model E705

Extractive oxygen analyzer

rack 19" mounting

 

The analyser is based on a yttria stabilized zirconia cell, that supply the relevant advantages that this mesuring principle can guarantee. The absence of cross sensitivity with other gases due to the oxygen vacancy generated in the zirconia substrate is one of the most important feature.

The peculiar drawing of the analysis chamber allows the changing of the flow of the sample without affecting the O2 measure.

The analyser does not require regular calibrations because it is fully temperature compensated. The measuring principle that does not need any mooving parts, ensures a very long life without any service.

The measuring range by volume is very wide O2 values and diagnostic are transmitted with analogic, serial and digital output. Optionally the Hart protocol is available.

This very tough instrument, is ideal to be used in a system for emission monitoring. It cannot be used for measuring O2 in a gas that contains combustibles, because the zirconia cell is warmed up to high temperature.

TECHNICAL SPECIFICATIONS

 

Gas analysed  

Oxygen in gas phase

Measuring principle  

Stabilized zirconia

Measuring field  

1 ppm – 25% O2 by volume

Accuracy  

+/- 0.5 of true value or 0.1% O2 whichever is the greater

Repeatability  

Within  1%

Response time  (90%)  

< 10 sec. With a flow of di 3 l/min

Flow of the sample gas  

0.5 – 3 l/min

Flow adjusting  

Niddle valve of the flowmeter.

Analog outputs  

4 – 20 mA isolated, max load 500 ohm or 0 – 10 V  10 mA linear on one of the following selectable fields: 0 – 1999 ppm; 0 – 5%; 0 – 10%; 0 – 25% , if the value is not valid the output is switched to 2 mA.

Serial outputs  

Mod Bus RTU su RS 485

Options  

Hart protocol

Alarms  

Potential free for: O2 high, O2 low, measure not valid, servicing, lack of flow. For all  250 V, 1 A max.

Dumper  

Time constant selectable from 0 and 900 sec.

Power supply  

230 e 115 V AC +/- 10%  50/60 Hz  300 VA max

EMC  

According EN 50081 e 50082

Electrical safety  

According EN 61010 – 1

Temperature limits  

0 – 40°C

Humidity  

< 90% non condensating

Storage temperature  

- 40 / +80°C

Sample gas input and output  

tubing  mm. 6x4

Test gas input  

tubing  mm. 6x4

Housing  

Rack 19” 3 units  IP20

Dimensions  

450x132 mm, deep 380 mm

Weight  

9 Kg approx

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