Target size and distance are critical to accuracy for most IR thermometers.

Every IR instrument has a field of view (FOV), an angle of vision in which it will average all the temperatures it sees

Field of view is described either by its angle or by a distance-to-size ratio (D:S). If D:S = 20:1, and if the distance to the object divided by the diameter of the object is exactly 20, then the object exactly fills the instrument’s field of view. A D:S ratio of 60:1 equals a field of view of 1°.

Typical Applications

The PyroUSB’s choice of measurement wavelengths allows it to be used in a wide range of industrial applications.

Steel

The short-wavelength PUA2 provides a more accurate reading on reflective metal surfaces, such as iron and steel, than longer-wavelength sensors. Applications include general steel strip temperature measurements at low temperatures, steel temperature measurement before the reheat furnace and temperature at the coiler on the hot rolling mill

Extrusion, Forging and Casting

PUA2 models are ideal for measuring the temperature of steel dies and workpieces in extrusion, forging and casting applications

Food

Measure the temperature of hot food products inside glass containers from 45°C to 300°C using PyroUSB PUA2 models. The pyrometer measures through the glass; readings can be taken on-line without interrupting production.

Other applications include tunnel pasteuriser temperature monitoring, and temperature of bare stainless steel surfaces on food manufacturing machinery, such as hot rollers and conveyors

Brake testing

PyroUSB PUA2 sensors allow non-contact measurement of ceramic, carbon, iron and steel brake disc temperatures between 45°C and 2000°C on brake test rigs

Wind power

PUA2 models can monitor brake disc surface temperature in wind turbines, to help warn of overheating and optimise cooling cycles. PUA8 models measure non-reflective parts of the turbine, such as gearbox and bearing housings. Non-contact infrared sensors can monitor the temperature of vibrating parts while being isolated completely from vibration.

Bearings, gearboxes and shafts

Non-contact temperature measurement of bare steel surfaces: the PyroUSB PUA2 is less susceptible than long-wavelength sensors to errors caused by reflections

Furnaces and ovens

The high-temperature capability of the PyroUSB PUA2 is ideal for measuring the temperature of hot objects inside furnaces and ovens, including steel mill heat treatment furnaces.

Pipe coating

Furnace-heated or induction heated pipe temperature measurement, at the preheat stage, before coating (using model PUA2)

Paper, Print and Converting

PUA2 models: Monitoring of the surface temperature of hot bare steel rollers, such as steam-heated dryer cylinder temperature in paper manufacturing.

PUA8 models: Accurate measurement of the paper temperature is easy, even at very low temperatures.

Temperature readings may be used for control and alarm.

Measuring Hot Food Product Temperature Through Glass Jars

The new PyroUSB 2.2 Series of infrared temperature sensors is ideal for measuring the temperature of hot food products through glass containers.

After a food product is filled into glass jars, samples are usually taken from the production line and manually probed to check the product temperature. The PyroUSB 2.2 now makes it possible to check product temperatures without taking samples from the production line, and without even touching the samples at all.

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