Two-Color Pyrometers QKTRD

Reliable Measurement Despite Smoke & Steam, from 300 °C to 3300 °C

Where conventional pyrometers reach their limits, the two-color pyrometers of the QKTRD 1xxx and QKTRD 4xxx series keep measuring reliably. Also known as ratio pyrometers, they capture thermal radiation in two wavelength ranges simultaneously and calculate the temperature from the ratio of both signals. As a result, the reading stays reliable even when smoke, steam, dust or dirty protective windows weaken the signal, or when the surface of the object changes during the process. Developed and manufactured in Germany.

Key benefits

• Insensitive to interference: stable readings despite smoke, steam, dust or dirty sight glasses
• Independent of emissivity: oxidation, scale or changing surfaces hardly affect the result. For special cases, the emissivity ratio is adjustable from 0.8 to 1.2.
• Small targets too: the object does not need to fill the measuring spot completely, ideal for thin wires or moving parts
• Wide range from 300 °C to 3300 °C
• Fast: response time below 1 ms with dynamic adaptation
• Accurate: measurement uncertainty 0.5 % ± 1 °C, repeatability 0.1 %
• Precise targeting: green LED aiming light showing the exact size and position of the measuring spot, vario optics for focusing
• Built for industry: IP65, analog output 0/4–20 mA, RS 232/RS 485, switching output, 24 V DC

The right two-color pyrometer for your application

Universal models QKTRD 1xxx: maximum flexibility with interchangeable optics, LED, laser or viewfinder targeting and optional fieldbus interfaces (PROFIBUS, PROFINET, EtherCAT, Ethernet, USB).

Compact models QKTRD 4xxx: two-color measurement in a small 30 × 65 × 80 mm housing with integrated vario optics (100–5000 mm). Ideal for machine and system integration.

With fiber optic cable (QKTRD 1475, 1485, 4485): for confined installations, vacuum furnaces and high ambient temperatures. Fiber and front optics withstand up to 150 °C.

Typical applications

Steel, iron, non-ferrous metals and wire: melting, casting, forging, rolling, hardening, tempering, preheating, coating, induction heating, laser processing and vacuum furnaces. Wherever the view of the object is obstructed or its surface changes.

Free IR-LOG software

IR-LOG lets you configure all parameters of your pyrometer on your PC and record and archive measurement data. The software is included free of charge.