How to find the right pyrometer: Avoid bad purchases and prevent incorrect
measurement results.
With the help of this guide, you can select the pyrometers, infrared temperature measuring devices, infrared thermometers or infrared temperature sensors that are suitable for your application.
In order to select the right pyrometer, it is necessary to consider/answer the following
technical questions:

Spectral range of the pyrometer
Spectral-range	Application examples	Stationary Pyrometers	Portable  infrared thermometers
8 – 14µm	Food, paper, textiles, plastics, leather, tobacco, pharmaceuticals, chemicals, rubber, coal, asphalt and almost all non-metallic surfaces	IR402
		novasens 2050
2.3 – 5.0μm	Measurements during glass production, glass finishing and further processing, tempering and hardening processes, production of flat glass, car glass, glass bottles and solar cells		HighTemp 520
2.2μm	Measurement of shiny and polished metal surfaces in low temperature range, melting processes, steel melting, heat treatment/tempering, rolling processes, laser cutting processes, laser welding, welding processes, continuous casting, metal recycling, forming process, sintering process,die casting, steel rolling, soldering, monitoring of induction processes and induction heating	IR702
1.1 – 3.7μm	Iron and steel production, melting and casting processes, forging processes and metal finishing process, high-temperature chemical processes, thermoforming processes such as bending, rolling and cutting		HighTemp 530

Temperature measuring ranges	Designation
-20°C to 100°C 0–250°C	IR402
-40°C to +60°C, 0-30°C, 0-50°C, 0-100°C, 0-250°C, 0-500°C,	novasens 2050
+100°C to +1800°C	HighTemp 520
45°C-300°C, 250°C-1000°C, 450°C-2000°C	IR702
+200°C to +2400°C	HighTemp 530

Connection for air cooling/lens cleaning with compressed air	Water cooling body and air purge attachment

Pyrometers and sensors are available in various optical resolutions. The optical parameters are specified as D:S ratio (Distance to Spot Size). A 15:1 ratio has a measuring spot diameter of 25.2mm at a measuring distance of 200mm (200mm/15=13.33mm + 11.9mm lens diameter = 25.2mm). If your measurement object is <25mm, place the sensor in the machine at a distance of up to 200mm. To select the correct optical resolution, consider the following parameters: • How large is the measuring distance between the pyrometer and the measured object? • Is it still variable or already fixed? • What size/dimensions does your measurement object have? To ensure correct temperature measurement, the measurement object must always completely fill the measurement spot.