In situ oxygen measurement
Fields of application
This analysis system is designed for demanding applications in potentially explosive atmospheres, such as refinery furnaces, petrochemical furnaces and large industrial boilers.
Benefits
The ATEX ZKMX zirconium oxygen controller and ATEX ZFKX measurement probe provide in situ zirconium oxygenanalyser for combustion control in potentially explosive atmospheres. Measuring the oxygen concentration in effluent enables the air/fuel ratio characterizing combustion to be monitored. This is essential for controlling the efficiency and ensuring the safety of the process.
The ZKMX controller is ATEX Zone 1 IIC T6 certified. It can be installed remotely from the sensor, on a stand or on a panel. The controller controls heating
and thermoregulation of the probe at 800°C. It measures the sensor signal and transforms it into O2 concentration according to the Nernst equation. The oxygen concentration value is displayed on the screen and can be transmitted to the control station via a 4-20mA signal. In addition, certain system maintenance operations, such as calibration, blowing or sensor regeneration, can be controlled directly from the controller.
The electronics can be operated from the control station using the following functions:
| Application | O2 measurement in non-combustible gas mixtures Industrial heat production in refineries Petrochemical reactor furnaces Large combustion plants |
| Measuring principle | In situ zirconia sensor |
| Scale | 0...2...50% vol O2 (user-configurable) |
| Repeatability | ≤ ± 0.5% PE |
| Linearity | ≤ ± 2 % PE |
| Response time (for 90%) | 4 s . ... 7 s |
| Analog output | 4-20 mAcc or 0-1 Vcc |
| Contact outputs | 6 points, SPST-NO contact: High/low limit alarm, maintenance in progress, purging in progress, calibration in progress, analyser fault |
| Contact inputs | 3 dry contacts: select from 7 options |
| Display | Backlit LCD |
| Communication | RS-485 (Modbus®) |
| Optional functions | Combustion efficiency display, declogging, automatic calibration, selection valve, flow meter |
| Controller installation | Panel mounting |
| Cable length between controller and detector | ≤ 50 m |
| Supply voltage | 100-120 VAC or 200-240 VAC, 50/60 Hz |
Technologies
The in situ zirconia oxygenanalyser , designed for ATEX zones (refineries, petrochemical plants, boilers), enables precise combustion control.
ATEX zirconia oxygen controller - ZKMX
Reference : ZKMX
