Gasanalyse

7873 Zirkoniumoxid Rauchgasanalysator

Self-heated probe, designed to measure Oxygen in flue gas (up to 700°C). Designed to measure Oxygen in flue gas for combustion efficiency and fuel saving in big boilers and power plants fed by Natural Gas, light and heavy oils, LPG, Biomass and Coal.

Self-heated probe, designed to measure Oxygen in flue gas (up to 700°C). Designed to measure... mehr
Produktinformationen "7873 Zirkoniumoxid Rauchgasanalysator"

Self-heated probe, designed to measure Oxygen in flue gas (up to 700°C). Designed to measure Oxygen in flue gas for combustion efficiency and fuel Self-heated probe, designed to measure Oxygen in flue gas (up to 700°C). Designed to measure Oxygen in flue gas for combustion efficiency and fuel saving in big boilers and power plants fed by Natural Gas, light and heavy oils, LPG, Biomass and Coal.

 

Available as a transmitter with 4-20 mA output from the probe head or combined with a control unit / display.saving in big boilers and power plants fed by Natural Gas, light and heavy oils, LPG, Biomass and Coal.

 

Measureable Gas

Oxygen [O2]

 

Main Features

Extreme Roughness

Rugged materials contacting the process gas

- Usable in flue gas up to 700°C, either continuously or cyclically

- Do not suffer damage or deformation

- Installation and protection tube makes the probe suitable for high dust flue gas, avoiding abrasion and sticking of dirty material.

- Different types of filter mesh and deflector plate to put against gas flow to limit the dust impact on the sensor:

Ceramic fiber mesh: Suitable for non-sticking dust and moderate flow rate applications.

Ceramic mesh: Suitable for high dust, sticking particulate and high flow rate that may generate abrasive effect.

 Metallic Stainless Steel sintered filter: suitable for highly abrasive dusts and high flow rates inside the stack

 

No Critical Parts

Potentially critical solutions have been avoided such as internal welds, critical couplings and separation of the reference atmospheres from the measurement atmospheres:

 

Easy to Use and Service

Direct insertion into the smokestack or duct

Possibility to check the calibration without removing the probe from process

All components parts easily accessible and field serviceable.

Sensor assembly replaceable without removal of the probe from its mounting.

 

European Compliance

Low Voltage Directive 2014/35/EU

EMC Directive 2014/30/EU

Spezifikation

Probe Specification

Accuracy

0.1% O2 below 5% or 2% of reading above 5%

Zero Drift

± 2% of reading in 3 months

Repeatability

± 1% of reading (short term)

Response Time

less than 5 sec. at T95 (with flow rate 2 l/min.)

Probe Head Protection

IP65

Weight

~ 1.5 ÷ 2.5 Kg. Depending on probe length (excluded installation tube)

Wiring Connections

N°1 cable gland for cable max. 10 mm and inner terminal strip

Pneumatic Connections

Reference and calibration air inlet: 1/8” NPT-F

Gas

Oxygen (O2)

Measuring Principle

Zirconium Oxide (Zirconia)

Sensor Output

E.M.F. function of Oxygen concentration

TC Output

E.M.F. function of the temperature

Type of Thermocouples

Standard type B (pt 6 Rh-Pt 30 Rh). In alternative type S

Humidity

0….90% non condensing

Temperature Range

600°C to 1250°C

Head Temperature

Max. 130°C

Reference Air

Dry, clean and oil-free air. Flow rate: 100…200 cc/min.

 

ADV222 Control Unit Specification

Analog Inputs

2 x isolated (1 for O2 and 1 for Temperature)

Analog Outputs

2 x 4-20 mA isolated (1 for O2 and 1 for Temperature)

Output Resolution

better than 1x10.000 of FS

Relays

N°2 relays SPDT, 230 VAC, nominal 2A (max 4A)   *

Power Supply

8...28 VDC ; 9...24 VAC

Ranges

0-25% O2   ;   0-1200°C   **

Operative Temperature

-20°C…+70°C

Humidity

0….90% non condensing

Led

Power supply (blue) - Cumulative inputs overload (red) - TX/RX (yellow/amber)

Serial Interface

RS485 2-wire  (Protocol ModBus-RTU)

Line Impedance

120 ohm

Termination Type

External

Max Speed

57600bps

Max No. of Nodes

32

*     Threshold to be selected at order (factory set) or settable in field by PC with ADEV Easy Configurator

**  Default ranges factory set. Modifiable on request at order on customer specification or by PC  with ADEV Easy Configurator

 

 

Supplementary ADbox Specification

Protection

IP55

Weight / Dimensions

8 Kg.  / 400 x 300 x 150 mm

Power Supply

100...240 VAC, 2A, 50/60 Hz.

Display

LCD 2.42” OLED . Resolution0.01%

Cable Entrance (bottom)

N°4 cable glands PG 13 / 9 / 7

 

Supplementary ADcase Specification

Protection

IP55

Weight / Dimensions

10 Kg.  / 400 x 300 x 150 mm

Power Supply

100...240 VAC, 2A, 50/60 Hz.

Display

LCD 2.42” OLED . Resolution0.01%

Cable Entrance (bottom)

N°4 cable glands PG 13 / 9 / 7

Pneumatic

Connections

Reference and calibration air inlets: 1/8” NPT-F

Configurations

1: Pressure reducer & manual valve

2: Pressure reducer & electro valve

3: Pump & manual valve

4: Pump & electro valve

Weitere Infos

Applications

Industrial boilers using any type of fuel: Natural gas, LPG, light oils, heavy oils, diesel, coal, biomass

 

- Utility Boilers

- Recovery Boilers

- Low Temperature Incinerators

- Power Plants

- Cement Kilns

- Industrial Furnaces

 

Other combustion processes where flue gas is within temperatures limits (within 700°C)

 

 

 

Measuring Principle

The measuring principle on which the analysis is based is linked to the use of Zirconium oxide which, at high temperatures, can behave like a solid state electrolyte, developing an electromotive force on two electrodes placed in contact with different O2 concentrations (partial pressures), proportional to the temperature in Kelvin degrees (°K) and the logarithm of the ratio between the two pressures PO2’ and PO2” in accordance with Nernst’s well-know ratio:

 

E = RT / nF (Lg P02’ / P02“)

 

 

 

Where: R = Perfect gas constant (8,31 Joule/degree bulk)

 

      F = Faraday’s constant

 

T = Absolute temperature in °Kelvin

 

n = 4

 

The inner sensing element is a based on a proprietary ADEV technology (micro-pod) and features a solid state reference that completely eliminate the need of a reference air flow, making the instrument very easy and practical to use in field.

 

- No reference air

- Sensor on the tip

- No gas circulation

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