Introduction
The document is a technical leaflet for the MAURER Infrared Quotient Thermometer, specifically the Series QKTR 1475, designed for non-contact temperature measurement in industrial settings.

Specifications
The thermometer measures temperatures ranging from 300 to 1200°C (572 to 2192°F) and is suitable for various applications such as steel, iron, non-ferrous metals, tempering, hardening, induction heating, laser, forging, vacuum-furnace, pre-heating, and rolling. It features a spectral range of 1.4 - 1.75 µm and a response time adjustable between 20 - 200 milliseconds. The accuracy is 1% ± 1°C, with a reproducibility of 3‰. The device operates within a working temperature of 0°C to 50°C and can be stored between 0°C and 60°C.

Design and Features
The QKTR 1475 is a compact unit combining an infrared measuring transducer and an electronic process unit. It includes a light beam aiming device and is equipped with a fibre optic cable and optic system for precise measurements even in challenging conditions such as smoke absorption or misted viewing glasses.

Technical Data
The thermometer offers an emission ratio adjustable between 0.8 - 1.2 and an emission factor from 0.1 to 1.0. It provides output values of 0 - 20 mA or 4 - 20 mA and requires an operating voltage of 24 V DC ± 10%. The unit's dimensions are 54 x 54 x 147 mm, and it weighs 0.7 kg. It is protected with an IP 65 rating.

Fibre Optic Cable
The fibre optic cable type GM-L49 is available in lengths of 1800 mm with different fibre bundle diameters. It can withstand ambient temperatures up to 150°C and has a minimum bend radius of 40 mm.

Options and Accessories
Optional features include a built-in digital display, electronic process unit, cooling case, blowing device, mirror 90°, and various mounting parts. The device can be customized with different objectives and fibre bundles to suit specific measurement applications.

Conclusion
The MAURER Infrared Quotient Thermometer Series QKTR 1475 is a versatile and precise tool for industrial temperature measurement, offering robust performance even in challenging environments.