ExTempMini – Miniature Intrinsically Safe Infrared Temperature Sensor for High Ambient Temperatures

ExTempMini – Miniature Intrinsically Safe Infrared Temperature Sensor for High Ambient Temperatures


  • Temperature range: -20°C to 1000°C
  • Sensing head for use in ambient temperatures up to 180°C
  • ATEX, IECEx and UKEX certified up to Zone 0 (gas)
  • JapanEx certified
  • 4-20 mA output, two-wire, loop-powered
  • Optional RS-485 network adapter and USB configuration tool
  • Supplied with 5 m, 10 m or 25 m sensing head cable
  • Stainless steel 316 housing, ideal for offshore applications
  • Not designed or approved for fever detection

Brand : Calex


Hazardous Area Classification:

AreaTemperature Rating (Ta) RangeATEX ClassificationIECEx Classification (Gas)
Main Enclosure-20°C ≤ Ta ≤ 70°CEx II 2 GEx ia [ia Ga] IIC T4 Gb
Sensing Head (ambient temperatures below 115°C)-20°C ≤ Ta ≤ 115°CEx II 1 GEx ia IIC T4 Ga
Sensing Head (ambient temperatures below 180°C)-20°C ≤ Ta ≤ 180°CEx II 1 GEx ia IIC T3 Ga
Maximum DC Input VoltageUi = 28 V
Maximum Input CurrentIi = 93 mA
Maximum Input PowerPi = 0.651 W
Maximum Internal CapacitanceCi = 5.17 nF
Maximum Internal InductanceLi = 1.99 µH
ATEX Certificate NumberCML 22ATEX2007X
IECEx Certificate NumberIECEx CML 22.0001X
JapanEx Certificate NumberCML 22JPN2009X
UKCA Certificate NumberCML 22UKEX2008X

General Specifications:

Measurement Temperature Range-20°C to 1000°C (see table of Model Numbers)
OutputTwo-wire 4 to 20 mA (loop powered)
Maximum Temperature Span1000°C
Minimum Temperature Span100°C
Accuracy± 1°C or 1%, whichever is greater
Repeatability± 0.5°C or 0.5%, whichever is greater
Emissivity Setting Range0.20 to 1.00 (pre-set to 0.95)
Emissivity Setting MethodUser configurable via optional USB / RS-485 adapters
Response Time, t90240 ms (90% response)
Spectral Range8 to 14 μm
Supply Voltage12 to 24 V DC ± 5%
Minimum Sensor Voltage11.4 V DC
Maximum Current Draw25 mA

Field of View Diagrams

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 the ExTempMini detects only the wavelengths of infrared radiation that are not absorbed by the atmosphere.

Mechanical Specifications:

ConstructionMain Enclosure: Painted Aluminium
Sensing Head: Stainless Steel 316
Major DimensionsMain Enclosure: 99 x 65 x 35 mm
Sensing Head: Ø 20 x length 69 mm including cable gland (see Dimensions)
MountingMain Enclosure: 2 x mounting holes, use M4 socket head screws
Sensing Head: M20 x 1.5 mm thread, length 20 mm, supplied with two mounting nuts
Cable Length (Sensing Head)Choice of 5 m, 10 m, or 25 m factory-fitted. Contact Calex for information about extending cable.
Weight with Cable475 g (5 m cable), 625 g (10 m cable), 1075 g (25 m cable)
Cable ConnectionsRemovable screw terminal blocks (see Connections). Conductor size 22 AWG to 14 AWG (0.326 mm2 to 2.08 mm2)
Output Cable GlandSuitable for cable diameters 3.5 to 7.0 mm

Environmental Specifications:

Environmental RatingMain Enclosure and Sensing Head: IP65 (NEMA 4)
Ambient (Operating) Temperature RangeMain Enclosure: 0°C to 70°C
Sensing Head: 0°C to 180°C
Ambient Pressure RangeMain Enclosure and Sensing Head: 80 kPa (0.8 bar) to 110 kPa (1.1 bar)
Relative HumidityMain Enclosure and Sensing Head: Max. 95% non-condensing
CE MarkedYes
RoHS CompliantYes

Data Sheet



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