Infrared thermometer CellaTemp® PKL 68

two-colorwith LED display°C

Product description:
The CellaTemp® PKL 68 two-colour infrared pyrometer detects object infrared radiation simultaneously at two wavelengths using a sandwich-design dual photodiode at the same measurement spot. Temperature is calculated from the ratio of the two radiation intensities. The latest generation of the CellaTemp® PK series features a vitality indicator for continuous self-monitoring, analysis and status reporting, enabling predictive maintenance by indicating optimal times for service checks and calibration based on operating conditions.

Key features:

• Measuring range 650 to 1,600 °C
• Universally configurable switching outputs (2× PNP open collector)
• High optical resolution via precision lenses
• IO‑Link interface (V1.1.3)
• All parameters adjustable via on‑sensor buttons or via plant control interface
• Very simple mounting via M30 central thread
• Large, high‑visibility 4‑digit LED display
• Fast response time t90 ≤ 10 ms (T > 750 °C)

Typical applications:

• Metal heating, heat treatment and thermal processing
• Continuous and discontinuous production lines
• Annealing, hardening and tempering processes
• High-temperature process monitoring and quality control

Technical specifications:

• Measuring parameters: Measuring range: 650–1600 °C; Sensor: photodiode; Spectral range: 0.95 / 1.05 µm; Response time t90: ≤ 10 ms (T > 750 °C); Measurement uncertainty: 1 % of temperature reading; Repeatability: 2 K; Temperature coefficient: 0.05 %/K; Resolution analog current output: 0.1 K + 0.005 % of selected measuring span; Resolution interface: 0.1 K; Resolution display: 1 K.
• Electrical parameters: Analog output: 0(4)–20 mA linear, switchable, scalable; Load resistance ≤ 500 Ω; Switching outputs: 2× PNP open collector 24 V DC, 150 mA max. each; Test input: 10–34 V DC (according to IEC 61131‑2); Interface: IO‑Link V1.1.3; Power supply: 18–32 V DC; Current consumption: ≤ 75 mA at 24 V DC.
• Features: 4‑digit red LED display (digit height 8 mm); Status display: 3 LEDs; Control elements: 3 buttons.
• General parameters: Connection: M12 thread 5‑pin (A‑coding); Ambient temperature: 0–65 °C; Storage temperature: -20–+80 °C; Permissible humidity: ≤ 95 % r.H. (non‑condensing); Dimensions: Ø30×235 mm (without plug); Housing: stainless steel V2A (1.4305); Protection class: IP65; Weight: approx. 0.4 kg.
• Adjustable parameters: Analog output 0/4–20 mA and scaling; Ratio correction via quick adjustment; Transmission of protective glass; Damping time constant; Hold time of maximum value memory; Operating mode, source and switching point; On/off delay of switching contacts; Temperature correction via interpolation points (X/Y pairs); Vitality indicator; Service parameters and factory reset; Key lock; Display of temperature or "run"; Temperature unit °C/°F; Temperature simulation.
• Functions: Overtemperature alarm (internal temperature > 75 °C); Service function (simulation of a measured value); DTD (Discontinuous Temperature Detection) for automatic detection in discontinuous processes; Diagnostic functions indicating reverse polarity, overload and incorrect supply voltage; Reverse polarity protection for power supply, analogue and switching outputs.
• Scope of delivery: Infrared pyrometer CellaTemp® PK; Short manual; 2 fixing nuts.
• Software: SW 50.

Video:
Improved & Smart CellaTemp PK pyrometers (video available)