Near-infrared thermometer CellaTemp® PX 31

fiber opticwith LED display°F

Product overview
The CellaTemp® PX 31 is a digital fibre-optic pyrometer designed for non-contact temperature measurement from 550 to 2500 °C. The system uses a separated optical measuring head connected to the electronics via a fibre optic cable, enabling measurements in electromagnetically noisy environments and in confined spaces. The measuring head tolerates ambient temperatures up to 250 °C without additional cooling.

Special features

• Measuring range variants up to 3000 °C
• IO-Link interface for digital communication
• Focusable, interchangeable lenses for precise distance adjustment
• Broadband anti-reflective precision optics
• Readable red LED display with remote visibility
• All parameters configurable via front keypad
• Diagnostic test current output
• 1 analogue output (0/4–20 mA) and 2 switching outputs
• Configurable source and ATD (automatic temperature detection) function

Properties / selectable options

• Measuring range (typical): 550–2500 °C (other ranges up to 3000 °C available)
• Focus distance examples: 0.2 m–∞; 0.12 m–∞; 0.033–0.045 m
• Sighting: Laser pilot light
• Example versions: CellaTemp® PX 31 AF 11; PX 31 AF 21; PX 31 AF 22

Technical data

• Sensor: Photodiode
• Spectral range: 0.78–1.06 µm
• Response time t98: ≤ 50 ms (T > 600 °C); ≤ 2 ms (T > 800 °C)
• Measurement uncertainty: 0.75 % of reading
• Repeatability: 2 K
• Temperature coefficient: 0.05 %/K
• Resolution (analogue output): 0.2 K + 0.03 % of range
• Resolution (interface): 0.1 K; display resolution: 1 K

Optical variants

• Measuring heads for 550–2500 °C: PA 41.01 (M30) focus 0.2 m–∞; PA 41.05 (M16) focus 0.12 m–∞; PZ 41.18 (M16) focus 0.033–0.045 m
• Measuring head for 700–3000 °C: PA 41.02 (M16) focus 0.5 m–∞

Electrical parameters

• Analogue output: 0(4)–20 mA, linear, switchable, scalable
• Load resistance: ≤ 500 Ω
• Switching outputs: 2 × Open Collector 24 V DC, ≤ 150 mA
• Interface: IO‑Link
• Supply: 24 V DC (+10 % / -20 %); current consumption ≤ 175 mA

Features

• Sighting: Laser pilot light
• Display: 4‑digit red LED, digit height 8 mm
• Status: 4 LEDs
• Control: 3‑button keypad

General parameters

• Connection: M12, 5‑pin
• Ambient temperature (electronics): 0–65 °C; measuring head: up to 250 °C (no cooling)
• Storage: -20–+80 °C
• Humidity: ≤ 95 % RH, non‑condensing
• Housing: Stainless steel V2A (1.4305); protection class IP65
• Dimensions: electronics Ø 65 mm × 187 mm; measuring head depends on type
• Weight: approx. 0.9 kg

Adjustable parameters

• Analogue output mode and scaling
• Smoothing filter, memory mode and hold time
• Emissivity and transmittance
• Alarm limits and operating mode for switching outputs
• ATD function parameters; simulation of current and temperature; unit °C/°F

Functions

• Overtemperature signal (internal temperature > 75 °C)
• Service function: simulate measured value or current signal

Scope of delivery

• Pyrometer CellaTemp® PX
• Connection cable VK 02/L AF 1 (5 m)
• Measuring head
• Short manual
• * Fibre optic cable ordered separately

Software
SW 50

Specifications

• Model family: CellaTemp® PX
• Main measuring range: 550–2500 °C
• Spectral range: 0.78–1.06 µm
• Sensor: Photodiode
• Analogue output: 0(4)–20 mA
• Interface: IO‑Link
• Switching outputs: 2 × Open Collector 24 V DC
• Response time: ≤ 50 ms (T > 600 °C), ≤ 2 ms (T > 800 °C)
• Measurement uncertainty: 0.75 % of reading
• Protection class: IP65
• Ambient temperature (electronics): 0–65 °C; measuring head up to 250 °C
• Housing: Stainless steel V2A (1.4305)
• Weight: approx. 0.9 kg