The CellaCast PA 81 was specially designed to measure the temperature of liquid metal at the runner of a blast furnace or cupola furnace. The sensor head is housed separately from the electronics assembly. Both the sensor head and the fibre optic cable are unsusceptible to electromagnetic radiation. The optical sensor head can withstand ambient temperatures up to 250 °C without cooling. CellaCast PA 81 is ideal for cramped, hard-to-access locations.
Features:
- Temperature range 800 – 2400 °C
- Maintenance-free, wear-free system for temperature measurement at the melting furnace, holding furnace, cupola furnace and blast furnace
- ATD function filters out temperatures detected from surfaces free of slag and oxide
- Dual-wavelength technique provides reliable temperature data despite dust and steam
- High-resolution optics enable viewing at greater distances
- Sensor head and fibre optic cable for ambient temperatures up to 250 °C
| type | Measuring range | Lens | Focus area | Distance ratio |
|---|---|---|---|---|
| 800 – 2400 °C | PA 41.01 | 0.2 m – ∞ | 190 : 1 |
| Measurement parameters | |
|---|---|
| Measuring range | 800 – 2400 °C |
| Sensor | Si/Si photo diode |
| Spectral range | 0.95 / 1.05 µm |
| Response time t98 | ≤ 20 ms (T > 950 °C) |
| Measurement uncertainty | 1.5 % of temp. reading [°C] |
| Repeatability | 3 K |
| Temperature coefficient | 0.05 %/K |
| Resolution current output | 0.2 K + 0.03 % of selected range |
| Resolution interface | 0.1 K |
| Resolution display | 1 K |
| Optical variants | |
| Measuring heads | PA 41.01 (M30): Focusing 0.2 m – ∞ |
| Electrical parameters | |
| Analog output | 0(4) – 20 mA linear, switchable, scalable |
| Resistance | ≤ 500 Ω |
| Analog input | 0 – 10 V |
| Switching output | 2 x Open Collector 24 V DC, ≤ 30 mA |
| Switching input | 2 x to 24 V |
| Interface | USB, RS 485 |
| Power supply | 24 V DC +10 % / -20 % |
| Current consumption | ≤ 175 mA bei 24 V DC |
| Features | |
| Sighting option | Laser pilot light |
| Display | 4-digit LED display red, digit-height 8 mm |
| Status display | 2 x LED |
| Control elements | 3 buttons |
| General parameters | |
| Connection | M12 thread 8-pin connection |
| Ambient temperature | Electronic: 0 – 65 °C Measuring head: 250 °C |
| Storage temperature | -20 – +80 °C |
| Permissible humidity | 95 % r.H. max. (non-condensing) |
| Dimension | Electronic: Ø 65 mm x 187 mm Measuring head: depending on the type |
| Housing | Stainless steel V2A (1.4305) |
| Protection class | IP 65 acc. to DIN 40050 |
| Weight | approx. 0.9 kg |
| Adjustable parameters | |
| Parameters | Measuring range Measured variable and scale of analog input and output signals Smoothing filter Memory operation mode Hold time of the memory Emissivity Transmittance Compensation of the reflected ambient radiation Limits and operating mode of the alarm contacts Parameters of the ATD function Linearization function Status display of the LEDs Simulation of current and temperature Temperature unit °C/°F Measurement channel two-colour, single-colour 1 and single-colour 2 Threshold level of the contamination monitoring |
| Functions | |
| Overtemperature signal | if the internal temperature exceeds 80 °C the analog output shows a value > 20.5 mA |
| Service function | Simulation of a measured value or a current signal |
| Scope of delivery | |
| Pyrometer CellaTemp PA Connection cable VK 02/A (5 m) Measuring head USB cable VK 11/D (1.8 m) Software CellaView Manual (short) * The fibre optic cable must be ordered separately. |
|
| Software | |
| CellaView | |
- molten metal at the melting furnace