FibreMini Fiber Optic Pyrometer for Harsh Applications

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FibreMini Fiber Optic Pyrometer for Harsh Applications
FibreMini Fiber Optic Pyrometer for Harsh Applications

FibreMini Fiber Optic Pyrometer for Harsh Applications

Regular price $1,650.00 $699.00 Sale SKU:FI-CA-FM2.2-751-MT-CRT-3M
1 In stock* Ships in N/A, if NOT in stock
* ships same or next day

  • Temperature ranges from 250°C to 2,000°C
  • Miniature sensing head withstands 200°C ambient temperature
  • Short measurement wavelength for improved accuracy on metals
  • No electronics in the sensing head - ideal for use near induction heaters and strong electromagnetic fields
  • Ideal for harsh high-temperature environments near furnaces in the metals industry require rugged measurement equipment.
  • 4-20mA output; alarm relays on all models
  • Built-in laser sighting


The FibreMini is no longer available any models left in inventory are a closeout sale and have been marked down significantly in price.  All sales are final.

The Calex FibreMini is an infrared temperature sensor (pyrometer) with a fiber optic sensing head and separate electronics module. The sensing head is designed to withstand high ambient temperatures of up to 200°C without cooling and contains no electronics, so it may be used in areas of strong electromagnetic interference. Continuous laser sighting illuminates the position and size of the measurement spot while readings are being taken, without affecting the accuracy of the measurement.

A touch screen interface is built into the electronics module, with temperature display, sensor configuration, data logging to an optional MicroSD Card, and configurable alarm relay outputs. The sensor works by detecting the infrared radiation emitted from a surface as a result of its own temperature. The amount of radiation emitted is related to the temperature, and the sensor uses this relationship to provide an accurate temperature output.

FibreMini sensors are ideal for measuring the surface temperature of many reflective metals in high-temperature applications, including iron and steel, as well as non-reflective non-metals.

The backlit touch screen interface mounted in the lid of the electronics module provides a large, bright display of the measured temperature, as well as controls allowing full configuration of the sensor. The graph view shows the history of the measured temperature. In alarm conditions, the display turns bright red to provide an immediate and obvious alarm indication. Alarm modes and levels can be configured via the touch screen.


The FibreMini can be used as a standalone data logger. All models include a MicroSD card slot for data logging, which can be configured via the touch screen interface. The user can select the sample rate and the number of samples to be taken and schedule the data logging to start at a certain time. With a MicroSD card larger than 2 GB, years of data can be stored, even at the fastest possible sample rate of 1 per second. Data is stored in .csv format and can be viewed and edited easily using spreadsheet software. Alarm events can also be logged to the MicroSD Card. A MicroSD card with SD card adapter is available as an optional accessory. The MicroSD card slot and battery holder are located inside the electronics module. Readings are time and date stamped using the sensor’s internal clock. The clock is reset when the power is disconnected, or it will continue if the optional battery is fitted.


Select from the drop down boxes on the top of the page
1) Field of View - choose from
    15: 1 Divergent Optics
    75:1 Divergent Optics

2) Temperature Range
    250°C to 1000°C
    450°C to 2000°C

3) Output/Cable Length
   4-20 mA Output/3M Cable
   4-20 mA Output/5M Cable
   4-20 mA Output/10M Cable
   RS485 Output/3M Cable
   RS485 Output/5M Cable
   RS485 Output/10M Cable



 Popular Models - To order scroll to the top of the page and choose the desired options from the drop down menu(or click on the model number), then ADD TO CART
Model No.  Description
FI-CA-FM2.2-751-MT-CRT-3MIn Stock FibreMini Pyrometer with 75:1 Field of View, 250 to 1000°C Temperature Range, 4-20mA Output/3m Cable

User Manual for FibreMini Fiber Optic Pyrometer

Temperature Range
MT models: 250°C to 1000°C
HT models: 450°C to 2000°C
Output: 4-20 mA or  RS485 Modbus
Field of View: 75:1 divergent optics (see Field of View Diagram below)
Accuracy: ±1% of reading
Repeatability: ±0.5% of reading
Emissivity Setting: Adjustable:
0.10 to 1.00 for measurements between 250°C to 350°C
0.05 to 1.00 for measurements above 350°C
Emissivity Setting: via touch screen
Response Time, t90: 125 ms (90% response)
Spectral Range: 2.0 to 2.6 μm
Supply Voltage: 24 V DC ± 5%
Maximum Current Draw: 100 mA
Max. Loop Impedance: 900 Ω (4-20 mA output)
Alarm Relays: 2 x Single Pole Changeover alarm relays, rated 24 V DC, 1 A, isolated 500 V DC
Cable Length: 3m

Data Logging Specifications
Data Logging Interval: 1 to 86,400 seconds (1 day) MicroSD CardMax. capacity: 32 GB (not included)
Internal Clock Battery: 1 x BR 1225 3V (not included)
Variables Logged: Target temperature, sensing head temperature, electronics module temperature, max, min, average, emissivity setting, reflected energy compensation Temperature, alarm events
File format: .csv
Configurable Parameters: Sample period, number of samples, scheduled start date and time

Touch Screen Interface Specifications
Touch Screen Display Format: 2.83” (72 mm) resistive touch TFT, 320 x 240 pixels, backlit
Configurable Parameters: Temperature range, temperature units, emissivity setting, reflected energy compensation, alarms, signal processing, date and time, data logging
Temperature Units: °C or °F configurable
Temperature Resolution: 0.1°
Alarm Configuration: Two alarms with adjustable level, individually configurable as HI or LO. Alarm 2 can be set to target temperature or sensing head internal temperature
Signal Processing: Average, peak hold, valley hold, minimum, maximum

Field of View Optics

Please note: The given measured spot diameter contains 90% of the energy detected by the sensor. For maximum accuracy, we normally recommend the target is at least twice as large as the given measured spot. The sensor may be used at longer distances than shown above. In clean air there is no maximum measurement distance, and the distance does not affect the sensor's measurement accuracy; this is because the FibreMini is filtered to detect only the wavelengths of IR that are not absorbed by the atmosphere.

FibreMini 30:1 Field of View

FibreMini 75:1 Field of View