
NDIR Gas Analyzer for heat treatment furnace (ZFG)
Continuous measurement of CO, CO2, CH4 in heat treatment furnace
Simultaneously and continuously measures concentrations of 2 different gases
- Repeatability: ±0.5% FS
- CP (Carbon Potential) calculation available (option)
- Single-beam system: long-term stability and low maintenance
- Simultaneous and continuous measurement of 2 different gases
- Compact and lightweight (approx. 5 kg)


Specifications
| Principle | Non dispersive infrared absorption method (single-beam) | |
|---|---|---|
| Measurable components and ranges | CO2: 0 to 0.5%…100 vol% CO: 0 to 0.5%…100 vol% CH4: 0 to 1%…10 vol% • Up to two components • 2 switchable ranges • Maximum range ratio 1 : 5 |
|
| Repeatability | ≤ ±0.5% FS | |
| Linearity | ≤ ±1.0% FS ≤ ±2% FS when range ratio is 1 : 4 or 1 : 5 |
|
| Zero drift | ≤ ±2% FS per week | |
| Span drift | ≤ ±2% FS per week | |
| Interference effect | ≤ ±2% FS | |
| Response time | ≤ 10 s (90% response from gas inlet) | |
| Analog output signal | 4–20 mA DC, 0–1 V DC, 0–100 mV DC, or 0–10 mV DC Instantaneous value output (concentration of each component) CP value output (option) |
|
| Display | Backlit LCD (with automatic light off function) Japanese or English (as specified) Instantaneous value, CP value (option), parameter setpoints |
|
| Range switchover | by key operation, automatic, or by external contact input (option) |
|
| Contact output | SPST relay contact Device error (standard), range identification signal (option) |
|
| External contact input (option) | No-voltage contact Remote range switching, remote hold of output signal |
|
| Gas inlet/outlet | Rc1/4 or NPT 1/4 | |
| Purge gas flow rate | 1 L/min (as needed) | |
| Finish color | Off-white (Mansell 10Y7.5/0.5 equivalent) | |
| Enclosure | Steel casing, indoor use | |
| Surrounding temperature/humidity | -5°C to 45°C, RH 95% or lower (no condensation) | |
| Warm-up time | Approx. 30 min | |
| Mounting method | Panel mount | |
| Power supply voltage | 100–240 V AC, 50/60 Hz, 50 VA | |
| Dimensions | H 211 x W 218 x D 257 mm | |
| Weight | Approx. 5 kg | |
| Calibration gas | Zero: N2 or dehumidified air Span: 90%–100% of each range |
|
| Gas conditions | Flow rate | 0.5 L/min ±0.2 L/min |
| Temperature | 0°C to 40°C | |
| Pressure | ≤ 5 kPa | |
| Dust | ≤ 0.3 μm | |
| Mist | Unallowable | |
| Moisture | Below the saturation vapor density at room temperature (Non condensing) | |
| Corrosive gas | HCl ≤ 1 ppm | |





































