Pyrometer CTratio 2M

The CTratio 2M is a rugged fiber-optical ratio thermometer for precise, non-contact temperature measurements from 250 °C to 3000 °C. Available in different models, it uses a dual-color pyrometer principle for reliable readings despite changing emissivity or obstructions. Ideal for high metal temperatures, it resists dust, steam, and dirty windows, with accurate measurements of up to 90% window soiling. The green laser aids alignment.

  • Two-Color Infrared Measurement
  • Green Laser Sighting
  • Temperature range: 250 °C to 3000 °C
  • Spectral range: 1.45 – 1.75 µm
  • Response time: down to 1 ms

The Optris CTratio 2M emerges as a rugged and reliable fiber-optical ratio thermometer, meticulously engineered for precise non-contact temperature measurement across a broad range of high temperatures, spanning from 250 °C to 3000 °C. This advanced instrument offers versatility and accuracy, catering to various measurement requirements through its three distinct models: 2ML, 2MH, and 2MH1. Leveraging the robust fiber-optical two-color technology, the CTratio 2M delivers consistent and repeatable temperature measurement results, thanks to the pyrometers innovative ratio measurement principle.

Unlike conventional single-color pyrometers that rely solely on intensity measurements, the CTratio harnesses the power of dual-color or two-color pyrometry. By measuring infrared radiation at two closely spaced wavelengths and evaluating the relationship between these intensities, the CTratio ensures accurate and reliable measurements even in adverse conditions. This approach proves invaluable in scenarios where emissivity is unknown or changes with temperature, as the infrared sensor accounts for variations in emissivity or process conditions proportionally across both wavelength signals.

Moreover, the CTratio’s resilience extends to challenging environments where obstacles like dust, smoke, or steam may be present in the optical path. With the ability to maintain reliability even with up to 90 percent attenuation caused by changing transmissions, this pyrometer remains a dependable tool in industrial settings. The infrared thermometers resistance to adverse conditions, coupled with precise temperature measurements, makes this infrared sensor indispensable across a wide range of applications.

Aligning the sensor for optimal performance is effortless with the CTratio 2M, thanks to its integrated green laser, providing real-time spot size indication at any distance. This feature simplifies sensor alignment, even on surfaces emitting intense red glow. Additionally, the motorized focus capability allows for adjustable focusing from 150 mm to infinity, ensuring versatility in targeting objects at various distances.

The temperature measurement ranges offered by the CTratio 2M cater to diverse industrial needs, with each model tailored to specific temperature ranges for both single-channel and dual-channel operation. This flexibility, combined with the pyrometers high system accuracy and repeatability, ensures consistent and reliable performance in demanding industrial environments.

Safety and durability are paramount considerations in industrial settings, and the CTratio 2M addresses these concerns admirably. Featuring an electrically isolated sensing head and a rugged stainless steel housing, this pyrometer prioritizes safety and reliability, making it suitable for the most challenging applications.

Manufactured in Germany, the CTratio 2M exemplifies precision engineering and uncompromising quality. The infrared thermometers adaptability, durability, and accuracy position it as the preferred choice for critical temperature control in industries such as metal and semiconductor manufacturing. With comprehensive support for various analog and digital outputs, seamless integration into industrial processes is assured.

In conclusion, the Optris CTratio 2M sets the standard for non-contact temperature sensing technology, offering unmatched accuracy, reliability, and versatility. Designed to excel in demanding industrial environments, this infrared pyrometer is the go-to solution for precise thermal monitoring across a wide range of applications.

MODEL CTratio 2ML CTratio 2MH CTratio 2MH1
DETECTOR
Detector Sandwich Detector
Measurement Principle Two Color
Spectral Range 1,45 – 1,75 µm
Response Time 1 ms
Exposure Time 1 ms
Sampling Frequency 1000Hz
Exchangable Sensing Head Yes
OPTICAL
Distance to Spot ratio (D:S) 38:1 100:1
Spot size (SF optics) 26.3 mm at 1000 mm 10 mm at 1000 mm
Other optics (FF/CF optics / add. CF lens) 1.5 mm at 150 mm
Focus Manual focus, 150 mm to infinity. infinitely adjustable
SIGHTING
Laser Sighting Laser with 520 nm at max 1 mW
Video Sighting none
MEASUREMENT
Object Measurement Range 1 color: 250…1000 °C
2 color: 275…1000 °C
1 color: 375…1500 °C
2 color: 400…1500 °C
1 color: 500…3000 °C
2 color: 550…3000 °C
Accuracy ±0.5 % of reading +2 °C **2)
Repeatability ±0.3 % of reading **2)
Temperature Coefficient ± 0.05 K/K or ± 0.05 % / K **3)
Thermal Sensitivity (NETD) 100 mK
Warm-up time 10 min
Emissivity /Transmissivity/ Reflectivity 0.050 – 1.100
Slope 0.800 – 1.300
INTERFACES
Interface USB
Serial Communication, Ethernet (optional)
Supported Protocols USB 2.0,
Relay Output / RS232 / RS485 / EtherNet/IP / Ethernet TCP / Modbus TCP / Modbus RTU / Profinet / Profibus (optional)
Compatible Software CompactPlusConnect, IRmobile
ANALOG INPUT/OUTPUT
Direct output/input Out: 2x 0/4 – 20 mA, Programmable open collector output

[24 V / 1 A] In: 1x 0-10V

Output impedances max. 500 Ω (with 8-36 V DC) for mA output
Cable length 3 m (standard), 8 m, 15 m
SIGNAL PROCESSING
Configuration CompactPlusConnect or Irmobile
Operation Autonomous Standalone and/or Computer-enabled
Capabilities 1 color/ 2 color mode/ attenuation monitoring,
alarms, peak hold, valley hold, average/
extended hold function with threshold and
hysteresis, Smart Ratio Mode (SRM)
GENERAL
Size Sensing head: Ø19 x 76 mm, M18x1
Electronics: 122 mm x 70 mm x 27 mm
Housing Material Stainless Steel
Weight Sensing head: 210 g (including 3 m fiber cable )
Electronics: 420 g
Country of Origin Germany
ENVIRONMENTAL & CERTIFICATIONS
Operating Temperature Range Sensing head: –20 … 200 °C (optional to 315 °C)
Electronics: 0 … 60 °C
Storage Temperature Range –40 … 85 °C
Relative humidity 10 – 95 %, non condensing
Protection Class IP 65, NEMA 4
EMC 2014/30/EU
Shock IEC 60068-2-27 (25 G and 50 G)
Vibration IEC 60068-2-6 (sinus shaped)
IEC 60068-2-64 (broadband noise)
Standards CE, Rohs
POWER
Power Supply 8 – 30 V DC / 5 V USB
Power Consumption max. 5 W
Current Draw N/A
Part number OPTCTRF2ML OPTCTRF2MH OPTCTRF2H1
Additional Remarks 1) 90% energy
2) at ambient temperature 23 ± 5°C, object temperature > 0°C ;
3) for ambient temperatures <18°C and >28°C; whichever is greater

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