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Yokogawa ZO21C-8-A/F
Product Introduction: A compact, standalone zirconia oxygen transmitter designed for on-line measurement of oxygen concentration in flue gases and process streams. It features 8 programmable relay outputs for alarm and control, an analog input for auxiliary measurements, and a user-friendly interface, making it ideal for small-scale combustion control and emissions monitoring applications.
Technical Specifications:
- Measurement Principle: Zirconia electrochemical cell
Detailed content
- Oxygen Range: 0.01 vol% to 21 vol% (configurable)
- Accuracy: ±1% of reading (at 800°C, 1 bar)
- Process Temperature: 400°C to 1200°C (with external sensor)
- Response Time: ≤8 s (T90, at 800°C)
- Output Signals: 2 × 4–20 mA DC (oxygen/temperature), RS-485 (Modbus RTU)
- Relay Outputs: 8 × SPDT relays (8-A suffix), 3 A/250 V AC, 3 A/30 V DC
- Analog Input: 1 × 4–20 mA DC (auxiliary measurement, e.g., flow/pressure)
- Power Supply: 100–240 V AC (50/60 Hz), 20 VA max
- Display: 4-digit LED (oxygen concentration, temperature)
- Dimensions: 96 × 96 × 150 mm (W × H × D), panel mount
- Certifications: CE, ATEX
Functional Features:
- 8 programmable relay outputs support multi-level alarm, combustion control, and interlock functions
- Analog input enables integration of auxiliary process variables for comprehensive system monitoring
- User-friendly interface with front-panel keys and LED display simplifies configuration and operation
- Built-in self-diagnostic functions monitor sensor health, power supply, and relay status
- Compact panel-mount design saves space in small control panels and skid-mounted systems
- Compatible with Yokogawa ZR22 series sensors for flexible installation options
Application Scenarios: Small industrial boilers, incinerators, commercial ovens, and laboratory furnaces requiring standalone oxygen measurement with multiple relay outputs for combustion control and alarm management.
