General Specifications
Temperature Range
LT: 45°C* to 300°C
PT: 100°C to 400°C
MT: 250°C to 1000°C
HT: 450°C to 2000°C
Field-of-View
15:1 (with LT or PT temperature range)
25:1 (with MT or HT temperature range)
75:1 (with MT or HT temperature range)
ø7.5mm @ 500mm (with MT or HT temperature range)
Output
Selectable 4 to 20 mA or 0 to 20 mA (linear with temperature)
Configuration
Via PC port conforming to USB 2.0
Accuracy
±1% of reading or ±2°C, whichever is greater
Repeatability
±0.5% of reading or ±0.5°C, whichever is greater
Response Time, t90
≥240 ms (90% response)
Spectral Range
2.0 to 2.6 μm
Supply Voltage
24 V DC (26 V DC max)
Sensor Voltage
11 V DC min
Max Loop Impedance
900 Ω @ 24 V DC
Maximum Span (analogue output)
Full temperature range (up to 1550°C)
Minimum Span (analogue output)
100°C
Software Specifications (CalexSoft)
Operating System
Windows XP or newer
Features
Temperature display, scrolling temperature chart, sensor configuration, data acquisition with scheduled start, on-screen and audible alarms, OPC Server interface
Data log file format
.csd (comma separated text format, may be imported to spreadsheet software such as Excel)
Environmental Specifications
Ambient Temperature Range
0ºC to 70ºC (cooling option available for use in higher ambient temperatures)
Relative Humidity
95% max. non-condensing
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 Calex sensors detect only the wavelengths of infrared radiation that are not absorbed by the atmosphere.
Mechanical Specifications
Construction
Stainless Steel
Dimensions
25 mm diameter x 106.5 mm long
Thread Mounting
M20 x 1 mm pitch
Weight with Output Cable
175 g
Output Cable Length
1 m (longer cable available to order)
Minimum Measurable Temperature (PU151LT2.2 only)
Graph showing the minimum measurable object temperature (Tmin), determined by surface emissivity (ε) and sensor temperature (Ts). Applies to model PU151LT2.2 only.
Electromagnetic Compatibility Standards
Conforms to EN61326-1, EN61326-2-3 (Electrical Equipment for Measurement, Control and Laboratory Use – EMC Requirements – Industrial)
The unique low-temperature, short-wavelength capability of the PyroUSB 2.2 means it can provide accurate readings on shiny metals at much lower temperatures than other sensors allow. For example, some typical uses include:
Typical Applications
Steel
The short-wavelength PyroUSB 2.2 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
The PyroUSB 2.2 is 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 the PyroUSB 2.2. 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
Non-contact measurement of ceramic, carbon, iron and steel brake disc temperatures between 45°C and 2000°C on brake test rigs
Wind power
Brake disc surface temperature monitoring in wind turbines, to help warn of overheating and optimise cooling cycles
Bearings, gearboxes and shafts
Non-contact temperature measurement of bare steel surfaces: the PyroUSB 2.2 is less susceptible than long-wavelength sensors to errors caused by reflections
Furnaces and ovens
The high-temperature capability of the PyroUSB 2.2 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
Paper, Print and Converting
Monitoring of the surface temperature of hot bare steel rollers, such as steam-heated dryer cylinder temperature in paper manufacturing. The temperature reading 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.