6801
Zirconia Flue Gas Analyser
Designed to measure Oxygen in flue gas for combustion efficiency and fuel saving. Ideal for measurements in post combustion chamber at high temperature typical of incinerators, cremators, heating furnaces, soaking pits and annealing furnaces.
Measureable Gas
Oxygen [O2]
Main Features
Extreme Roughness
- Wetted parts in ceramic materials (Zirconia and pure alumina)
- Resistant to corrosion by acid & aggressive substances, to abrasion and to the alternation of oxidant and reducing conditions
- External flanged installation & protection tube (option) warranty extra protection in case of huge dust amount in the process
Easy to Use
- Direct insertion into the chimney or post-combustion chamber.
- Integral thermocouple
- Possibility to verify the calibration without removing the probe from process
- Calibration (with air flowing) simply pushing one button on ADV222 control unit
Low Costs of Ownership
- Really in situ measurement
- No sampling system required
- Sensor on the tip and no gas circulation
European Compliance
- Low Voltage Directive 2014/35/EU
- EMC Directive 2014/30/EU
- Directive ATEX 94/9/EC (optional)
ATEX
The Probe 6801 can be configured for hazardous area classified Zone 1 in accordance to EN 94/9/EC (ATEX) and EN 60079-10.
Specification
| Probe | |
|---|---|
| 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. |
| Control Unit | |
| ADV222 specifications (common to all versions) | |
| Analog Inputs | 2 x isolated (1 for Oxygen and 1 for Temperature) |
| Analog Outputs | 2 x 4-20 mA isolated (1 for Oxygen 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 ; 0-1000°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 |
| Protection | IP20 |
| Weight | 900 gr. |
| Connections | Removable screw terminals pace 5,08 mm |
| Conductor Section | Max. 2,5 mmq |
| Mounting | DIN rail |
| *Threshold to be selected at order (factory set) or settable in field by PC with ADEV Easy Configurator or by display if ADbox or ADcase are selected | |
| **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 | 8 Kg. |
| Dimensions | 400 x 300 x 150 mm |
| Display | LCD 2.42” OLED . Resolution0.01% |
| Cable Entrance (bottom) | N°4 cable glands PG 13 / 9 / 7 |
| Supplementary ADcase Specification | |
| Protection | IP55 |
| Weight | 10 Kg. |
| Dimensions | 400 x 300 x 150 mm |
| 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 | ADcase-1: Pressure reducer and manual valve |
| ADcase-2: Pressure reducer and electro valve | |
| ADcase-3: Pump and manual valve | |
| ADcase-4: Pump and electro valve |
Applications
Annealing Furnaces
Reheating Furnaces
Preheating Furnaces
Soaking Pits
Cremators
Civil Waste Incinerators
Industrial Waste Incinerators
Hospital Waste Incinerators
Sintering of Metals
Process Heaters
Other combustion processes where flue gas is within temperatures limits (600 ÷ 1250 °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 (E.M.F.) on two electrodes placed in contact with different O2 concentrations (partial pressures), proportional to the temperature in Kelvin degrees (°K) and to the logarithm of the ratio between the two pressures PO2’ and PO2” in accordance with Nernst’s well-known ratio:
E = RT / nF (ln P02’ / P02“)
Where: R = Perfect gas constant (8,31 Joule/degree bulk)
F = Faraday’s constant
T = Absolute temperature in °Kelvin
n = 4