The Optris CT P3 pyrometer is designed for precise temperature measurement of thin plastic films, utilizing a spectral range of 3.43 µm for accuracy between 50 °C and 400 °C. While plastics thicker than 0.4 mm and pigmented films are easily measured in the long-wavelength IR spectral range, very thin plastic films are transparent in this spectral range. Therefore, thin foil plastics require specific narrow-band sensitive IR sensors that match material-specific absorption bands in the IR spectrum to measure their temperature. The IR thermometer has a rapid response time of 100 ms and can withstand temperatures up to 75 °C. Its electronics box offers various outputs, and optional accessories enhance functionality for industrial use.
The Optris CT P3 pyrometer is engineered with precision to accurately measure the temperature of thin plastic films. The pyrometers specialized spectral range of 3.43 µm ensures precise measurements within a broad temperature range, spanning from 50 °C to 400 °C.
Emissivity is a crucial factor in non-contact temperature measurement and must be considered based on various factors, including material properties and wavelength. Plastics thicker than 0.4 mm and pigmented films can be easily measured in the long-wavelength IR spectral range (8-14 μm) with emissivity of ≥ 0.9. However, very thin plastic films are transparent in this range, necessitating temperature measurement through material-specific absorption bands in the IR spectrum via narrow-band sensitive IR sensors. Materials like Polyethylene (PE), Polypropylene (PP), Cellophane, Polystyrene (PS), Polymethylmethacrylate or Acrylic (PMMA), Polycarbonate (PC), Polyester (PET), and Polyvinyl chloride (PVC or Vinyl) exhibit IR opaqueness at 3.43 μm, while polyester, polyurethane, Teflon, FEP, and polyamide exhibit this property at 7.9 μm.
The CT P3 infrared thermometer, with its extremely narrow-band spectral range of 3.43 μm, is ideal for measuring the temperature of very thin plastic materials. The infrared sensors temperature range spans from 50 °C to 400 °C, and it offers a rapid response time of 100 ms. The sensing head can withstand temperatures of up to 75 °C without requiring additional cooling. The separate electronics box is equipped with easily accessible programming buttons and a backlit LCD display.
The Optris CT P3 series infrared sensor emphasizes adaptability, featuring an electronics box with a wide array of analog and digital outputs, including 0/4 – 20 mA, 0 – 5 V, 0 – 10 V, thermocouple (type K or J), USB, RS485, RS232 interfaces, relay outputs (2 x optically isolated), Profibus DP, ProfiNet, and Ethernet, Ethernet/IP. Optional accessories further enhance its functionality, catering to diverse industrial needs. The mounting fork ensures secure and stable installation for continuous temperature monitoring, while the sighting tube enables precision targeting and improved accuracy in specific applications. The close-focus lens facilitates detailed temperature measurements on small or distant objects. The air purge accessory safeguards the temperature sensor from contaminants in harsh environments, and cooling jackets optimize performance in elevated temperature conditions, ensuring consistent and accurate readings. These optional accessories significantly expand the versatility of the Optris CT P3 series, providing tailored solutions for varied industrial scenarios.
In summary, the Optris CT P3 series pyrometer combines precision, adaptability, and durability to facilitate non-contact temperature measurements. Whether capturing rapid manufacturing processes or operating in challenging conditions, the IR pyrometer offers a reliable and efficient solution for diverse industrial applications.
| DETECTOR | |
| Detector | Thermopile |
| Measurement Principle | Single Color |
| Spectral Range | 3.43 µm |
| Response Time / Exposure Time | 100 ms |
| Sampling Frequency | 10 Hz |
| Exchangable Sensing Head | No |
| OPTICAL | |
| Distance to Spot ratio (D:S) | 15:1 |
| Spot size (SF optics) | 26.7 at 400mm |
| Focus | fixed |
| Laser Sighting / Video Sighting | none |
| MEASUREMENT | |
| Object Measurement Range | 50 ... 400 °C |
| Accuracy | ±3 °C or 1 % **2) |
| Repeatability | ±1.5 °C **2) |
| Thermal Sensitivity (NETD) | 100 mK |
| Warm-up time | none |
| Emissivity /Transmissivity/ Reflectivity | 0.100 – 1.100 |
| INTERFACES & SIGNAL PROCESSING | |
| Interface | USB / RS232 / RS485 / Profibus / Ethernet / Relay |
| Direct output/input | 0-20 mA/4-20 mA/0-5 V/0-10 V/t/c (K/J) |
| Capabilities | Average, Peak hold, Valley hold, Advanced peak hold with threshold and hysteresis, Triggered signal output, Triggered peak hold function |
| Compatible Software | Compact Connect, IRmobile |
| GENERAL | |
| Size (Sensing head) | Ø29.5mm x 35 mm, M18x1 |
| Size (Electronics) | 122 mm x 70 mm x 27 mm |
| Housing Material | Stainless Steel |
| Weight | Sensing head: 200 g / Electronics: 420 g |
| Operating Temperature Range | Sensing head: 0 °C ... 75 °C / Electronics: 0 °C ... 75 °C |
| Protection Class | IP 65, NEMA 4 |
| Power Supply | 8 – 36 V DC / 5 V USB / max. 1.2 W |

Thermography software optris PIX Connect is included and license-free.All infrared cameras are delivered with the thermography software optris PIX Connect, developed specifically for the extensive documentation and analysis of thermal images. The Windows-based PIX Connect software enables users to tailor the infrared cameras to meet specific requirements. It analyses live and recorded temperature data and triggers alarm signals for process integration. The key to leveraging the Optris infrared camera is a correct configuration. This includes detailed device-specific configurations such as frame rate, measurement range adjustments, external communication settings, and USB/Ethernet configurations. Moreover, PIX Connect facilitates firmware updates and the download of configuration files over the Internet.
Optris offers several different SDKs for our Xi and PI thermal imaging cameras. Depending on the operating platform, the infrared camera, the coding language, and the hardware platform, different software interfaces can be utilized:
The Optris IRmobile allows users to set up and commission an Optris infrared pyrometer or infrared camera with an Android smartphone or tablet. This tool becomes handy for commissioning and aligning the infrared camera’s field of view or adjusting the configuration. The app analyzes the connected infrared camera‘s live infrared image stream with auto hot and cold spot detection. For pyrometers, a temperature-time diagram or the video signal is displayed. This app works on most Android devices running 5.0+ with a USB port supporting USB-OTG (On The Go).