Paramagnetic Oxygen Analyzer ZAJ FUJI ELECTRIC
Paramagnetic oxygen gas analyser – ZAJ
Measurement of oxygen concentration in flue gases
This analyser is used for continuous measurement of oxygen concentration in flue gases from boilers and industrial furnaces, for combustion control and optimization. It consists of a measurement probe combined with a signal converter. The probe is associated with a convection tube which is inserted into the flue gas to channel the gases to the probe for oxygen measurement. The converter (ZKM) is a microprocessor-based signal converter that manages inputs/outputs, digital communication, display and control of the overall operation. The converter features advanced functions such as self-diagnosis of operation and probe regeneration, giving it very long stability.
Features
- • Fast response within 2 seconds
• Precise, stable measurements with low sensitivity to interference
• Very long (>12 years) sensor life, no contact with process gas
• Robust, corrosion-resistant ZAJ paramagnetic technology with no moving parts
Fields of application
Reliable process control for furnaces, metallurgy, semiconductor industry and gas separation.
Technical Specifications:
| Application | O2 measurement in non-combustible gas mixtures |
| Principle | In-situ zirconia sensor |
| Scale | O … 2 … 50% Vd 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 contacts: high/low limit alarm |
| maintenance in calibration in progress, fault analyser, purging in progress, calibration in progress, fault analyser | |
| Contact inputs | 3 dry contacts: select from 7 options |
| Display | Backlit LCD |
| Connectivity | RS-485 Modbus or HART |
| Optional functions | Combustion efficiency display, cleaning, automatic calibration, selection valve, flow meter |
| Safety functions | When theanalyser detects a break in the thermocouple used to control the temperature in the detector, it cuts power to the detector. In the event of an emergency, the detector’s power supply can also be cut off via an external input. Locking function prevents operating errors |
| Controller installation | Panel or pipe mounting |
| Cable length between controller and detector | < 100m |
| Power supply | 100-120 v ac or 200-240 v ac, 50/60 Hz |
