Gallery

Sensor Features

Temperature ranges from -40°C to 2000°C
Short-wavelength models for better accuracy on high-temperature targets and metals
General purpose models for most other applications
Rescalable 4-20 mA output
Fully configurable via included USB cable and free software
Use the USB or analogue output only, or both together
Not designed or approved for fever detection

Software Features

Sensor configuration
Display of measured temperature
Scrolling temperature chart
On-screen alarms
Data acquisition to Excel-compatible file

Data Sheet

Key Feature Tags

General Specifications

Temperature Range

PUA2 models:
LT: 45°C* to 300°C
PT: 100°C to 400°C
MT: 250°C to 1000°C
HT: 450°C to 2000°C

PUA8 models:
-40°C to 1000°C

Field-of-View

PUA2 models:
15:1 (with LT or PT temperature range)
25:1 (with MT or HT temperature range)
75:1 (with MT or HT temperature range)

PUA8 models: 30:1 or Close Focus ø 5 mm @ 100 mm

Output

Two-wire 4 to 20 mA (linear with temperature)

Configuration

Via PC port conforming to USB 2.0

Accuracy

PUA2 models: ±1% of reading or ±2°C, whichever is greater

PUA8 models: ± 1°C or 1% of reading, whichever is greater

Repeatability

±0.5% of reading or ±0.5°C, whichever is greater

Emissivity Setting

Adjustable 0.1 to 1.0 via software

Response Time, t90

200 ms

Spectral Range

PUA2: 2.0 to 2.6 µm
PUA8: 8 to 14 µm

Supply Voltage

24 V DC (28 V DC max)

Sensor Voltage

6 V DC min

Max Loop Impedance

900 Ω @ 24 V DC

Maximum Span (analogue output)

Full temperature range

Minimum Span (analogue output)

100°C

Software Specifications (CalexConfig)

Operating System

Windows

Features

Temperature display, scrolling temperature chart, sensor configuration, data acquisition with scheduled start, on-screen alarm

Data log file format

.csd (comma separated text format, may be imported to spreadsheet software such as Excel)

Data transmission protocol

Modbus over USB (it is possible to communicate with the sensor for temperature measurement and configuration using third-party software. Protocol information is provided in the instruction manual.)

Environmental Specifications

Environmental Rating

IP65

Ambient Temperature Range

0ºC to 70ºC (cooling option available for use in higher ambient temperatures)

Relative Humidity

95% max. non-condensing

Field of View Diagrams

Please note: The given measured spot size contains 90% of the energy detected by the sensor. We normally recommend the target is at least twice as large as the given measured spot for maximum accuracy. Sensors may be used at longer distances than the above diagrams show. There is no maximum measurement distance in clean air; this is because PyroUSB sensors detect only the wavelengths of infrared radiation that are not absorbed by the atmosphere.

Mechanical Specifications

Construction

Stainless Steel

Dimensions

Ø 27.6 x length 61 mm including cable glands

Thread Mounting

M20 x 1 mm pitch, length 15 mm

Weight with Output Cable

155 g

Output Cable Length

1 m (longer cable available to order)

USB Cable Length

1.8 m

Minimum Measurable Temperature (PUA2-151-LT only)

Graph showing the minimum measurable object temperature (Tmin), determined by surface emissivity (ε) and sensor temperature (Ts). Applies to model PUA2-151-LT only.

Electromagnetic Compatibility Standards

Conforms to EN61326-1, EN61326-2-3 (Electrical Equipment for Measurement, Control and Laboratory Use – EMC Requirements – Industrial)

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

Typical 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.

The 4-20 mA analogue output and USB output may be used individually, or both may be used at the same time.

For software, see www.calex.co.uk/software

Electrical Installation

4-20 mA output

USB and 4-20 mA outputs together

USB output only

Dimensions (mm)

Air Purge Collar

The air purge collar is used to keep dust, fumes, moisture and other contaminants away from the lens. Air flows into the fitting on the side and out of the aperture at the front.

Fixed Mounting Bracket

The L-shaped fixed mounting bracket offers a rigid support for the sensor and allows fine rotational adjustment about one axis.

Adjustable Mounting Bracket

The adjustable mounting bracket consists of a fixed mounting bracket plus another L-shaped bracket. When assembled as shown, the adjustable mounting bracket offers a rigid support for the sensor and allows fine two-axis adjustment.

Air/Water Cooled Housing

The air/water cooled housing allows the sensor to withstand ambient temperatures above the normal limit. Depending on the degree of cooling required, air or water may be used as the cooling fluid. To prevent condensation forming on the lens, an air purge collar is included with this item. The air/water cooled housing must be ordered with the sensor and cannot be fitted by the user.

Laser Sighting Tool

The Laser Sighting Tool screws onto the front of the sensor during installation and shows precisely where the sensor is aiming. Once the sensor has been aimed at the centre of the target and locked in position, the Laser Sighting Tool can be removed. The laser is operated via a latching push button on the front of the tool.

Data Sheet / Operator’s Guide (PDF)

PID Controllers and Indicators

The 4-20 mA output of the PyroUSB may be connected to any of our indicating controllers, which provide temperature display, PID control and alarm relay outputs.

Spectral Response

[PUA2] Short Wavelength, 2.2 µm, for measuring reflective metals and high-temperature objects
[PUA8] General Purpose, 8 to 14 µm, for most other applications

Optics

PUA2
[151] 15:1 divergent optics (LT & PT models only)
[251] 25:1 divergent optics
[751] 75:1 divergent optics
[CF] Close Focus optics (focal spot diameter 7.5 mm at 500 mm distance)

PUA8
[301] 30:1 divergent optics
[CF] Close Focus optics (focal spot diameter 5 mm at 100mm distance)

Temperature Range

PUA2
[LT] 45°C to 300°C (151 models only)
[PT] 100°C to 400°C (151 models only)
[MT] 250°C to 1000°C
[HT] 450°C to 2000°C

PUA8
(blank) All models: -40°C to 1000°C

Cooling

(blank) Sensor without cooling
[WJ] Air/water cooled jacket with air purge collar