Digital pyrometer CellaTemp® PA 21

°CRS485USB

Overview
The CellaTemp PA 21 is a fibre-optic digital pyrometer for non-contact measurement of temperatures from 300 to 2000 °C (also available in 450–2500 °C). The instrument features a separated optical measuring head connected by fibre optic cable, making the sensor and cable immune to electromagnetic interference and allowing the measuring head to operate in ambient temperatures up to 250 °C without cooling. The separate head version is especially suitable for confined or hard-to-reach locations.

Key features

• Measuring range: 300–2000 °C (option 450–2500 °C)
• Focusable interchangeable lenses for exact adjustment of measuring distance
• Broadband anti-reflective precision optics and short measuring wavelengths
• LED display readable at long distance (4-digit red display, digit height 8 mm)
• Test current output for diagnostics; analogue output and USB/RS485 interface standard
• Measuring head and fibre optic cable heat resistant up to 250 °C without cooling
• Stainless steel housing, protection class IP65

Versions / Options (summary)
Available versions: AF 11, AF 21, AF 22, AF 901. Example default shown: measuring range 450–2500 °C (option AF 901).

Measuring field / examples
Measuring distance (mm) - Measuring field diameter (mm): 0.00 - 21.50; 8.00 - 20.68; 16.00 - 19.87; 24.00 - 19.05; 32.00 - 18.24; 40.00 - 17.42; 48.00 - 16.61; 56.00 - 15.79; 64.00 - 14.98; 72.00 - 14.16; 80.00 - 13.34; 88.00 - 12.53; 96.00 - 11.71; 104.00 - 10.90; 112.00 - 10.08; 120.00 - 9.27; 128.00 - 8.45; 136.00 - 7.64; 144.00 - 6.82; 152.00 - 6.00; 160.00 - 5.19; 168.00 - 4.37; 176.00 - 3.56; 184.00 - 2.74; 192.00 - 1.93; 200.00 - 1.11

Scope of delivery (standard)

• Pyrometer CellaTemp PA electronic unit
• Connection cable VK 02/A (5 m)
• Measuring head (type depends on version)
• USB cable VK 11/D (1.8 m)
• Software: CellaView
• Short manual
• Note: fibre optic cable must be ordered separately

Software
CellaView for configuration and data evaluation

Technical specifications

• Measuring range: 300–2500 °C in several segments (typical: 300–2000 °C; 450–2500 °C)
• Sensor: photodiode; spectral range: 1.1–1.7 µm
• Response time t98: ≤50 ms (lower segment), ≤2 ms (at higher temperatures as specified)
• Measurement uncertainty: 0.75% of reading, min. 4 K; repeatability 2 K
• Analog output: 0(4)–20 mA linear, scalable; analog input: 0–10 V
• Switching outputs: 2 x open collector 24 V DC; switching inputs: 2 x to 24 V
• Interfaces: USB and RS485
• Power supply: 24 V DC +10% / -20%, current ≤175 mA
• Sighting option: laser pilot light (optional)
• Display: 4-digit red LED (digit height 8 mm); status display: 2 LEDs; control: 3 buttons
• Connection: M12 thread 8-pin connector
• Ambient temperature: electronics 0–65 °C; measuring head and fibre optic cable heat resistant up to 250 °C without cooling
• Storage temperature: -20 to +80 °C; permissible humidity: 95% r.H. max. (non-condensing)
• Dimensions: electronic unit Ø 65 mm x 187 mm; housing stainless steel V2A; protection class IP65; weight approx. 0.9 kg
• Measuring principle: single-colour; functions include emissivity/transmittance adjustment, smoothing, alarms, simulation and diagnostics