Converter (ZKMB)
Converter (ZKMA)
Detector (ZFK8)
In-situ oxygen analysis requires no gas sampling device
Ideal for combustion control in industrial boilers and furnaces
FEATURES
- HART communication
- Easily replaceable zirconia element
- Fast response (4 to 7 seconds)
- IP66 or IP67 enclosure
- Operation available without opening the cover (ZKMA only)
- Safe design
High safety level
- The converter cuts off the power supply for the detector when detecting a burnout of thermocouple.
- The converter also cuts off the power supply at emergency, in response to an external contact input.
- The key lock function prevents operational errors.
Easily replaceable zirconia element
Operation available without opening the cover
System diagram
Specifications
General specifications
| Item | Specifications |
|---|---|
| Target | O2 in incombustible gas |
| Principle | Direct insertion type zirconia sensor |
| Range | 0 to 2…50 vol% (user configurable) |
| Repeatability | ≤ 0.5% FS |
| Linearity | ≤ ±2% FS |
| Zero & span drift | ≤ 1% FS per week |
| Response time | 4 s to 7 s (from calibration gas inlet) |
| Analog output | 4–20 mA DC or 0–1 V DC, isolated |
| Power supply voltage | 100–120 V AC or 200–240 V AC |
Detector
| Item | Specifications |
|---|---|
| Gas temperature | Flow guide tube type: -10°C to +600°C Ejector type: -10°C to +1500°C |
| Gas pressure | -3 kPa to +3 kPa |
| Filter | Alumina, quartz paper |
| Enclosure | IP66 equivalent (excluding the tip end filter) |
| Weight | Approx. 1.6 kg (excluding the flow guide tube) |
Converter
| Item | Specifications |
|---|---|
| Display | Digital 4-digit, with backlight |
| Contact output | Relay contact, 6 points |
| Contact input | No-voltage contact, 3 points |
| Communication | HART or RS-485 (MODBUS) |
| Functionality | Thermocouple break detection, key lock |
| Output hold | During calibration and blow down |
| Options | Combustion efficiency display, blowdown, auto calibration, cock (selector valve), flowmeter |
| Enclosure | IP66 or IP67 (as specified) |
Flow guide tube
| Item | Specifications |
|---|---|
| Type | 4 types: General-purpose, corrosion resistant, with blowdown nozzle, for high particulate |
| Length | 300 mm to 1000 mm (as specified) |
| Mounting flange size | JIS5K 65A (80A for high particulate type) |
