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Calex ExTempMini - Infrared Temperature Sensor for High Ambient Temps

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The ExTempMini series of intrinsically safe non-contact infrared temperature sensors offer fast response time, high stability, and a temperature range of -20°C to 1000°C. With its adjustable emissivity setting and various optics options, it provides accurate temperature measurement for hazardous areas.

Part Number: ExTempMini

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Overview
Field of View
Applications
Specifications

Reduce downtime thanks to fast response time and high stability

ExTempMini intrinsically safe non-contact infrared temperature sensors measure the temperature of an area of the surface of a solid or liquid, and transmit this as a linear 4-20 mA output.

Temperature ranges from -20°C to 1000°C are available. All models have an adjustable emissivity setting, and may be used to measure a wide variety of target materials, including food, paper, textiles, plastics, leather, tobacco, pharmaceuticals, chemicals, rubber, coal, asphalt and paint.

A choice of optics is available to measure small or large targets at short or long distances. The optional LCT Loop Configuration Tools (USB and RS-485 adapters) and free software allow the ExTempMini to be connected to a PC, PLC or SCADA system for temperature indication, sensor configuration and data acquisition.

These sensors are designed primarily for use in hazardous areas in conjunction with a suitable Intrinsically Safe isolator. All models have been certified Intrinsically Safe for use in gas hazardous areas by Certification Management Ltd. They comply with the European ATEX Directive 2014/34/EU and are covered by certificates for IECEx (international) and UKCA (United Kingdom). The ExTempMini Series is also approved for use in Japan (JNIOSHTR-46-1:2020 (General requirements); JNIOSH-TR-46-6:2015 (Intrinsic Safety “i”)).

Features

Suitable for gas hazardous areas, Zone 0, 1 and 2 (sensing head) with a suitable Intrinsically Safe isolator
Miniature sensing head for use in high ambient temperatures up to 180°C
Temperature range: -20°C to 1000°C
Two wire, 4-20 mA output
Rescalable output and adjustable emissivity setting via optional USB and RS-485 adapters
Fast response time and high stability
Stainless steel 316 housing on sensing head - ideal for offshore applications
IP65 sealed
Supplied with up to 25 m sensing head cable

Typical Applications

The ExTempMini’s ATEX, IECEx, UKCA and JapanEx certification makes it suitable for many applications in hazardous areas involving gas.

Applications include:

Petrochemical - Condition Monitoring

Bearing, gearbox and motor housing surface temperatures in refineries and chemical plants can be monitored without contact, eliminating the need to replace contact probes that are easily damaged by vibration.

Gas Cylinder Filling

The surface temperature of cylinders of flammable gases is monitored with the ExTempMini as they are filled. The Group IIC, T4 (or T3 depending on ambient temperature) classification of the sensing head makes it suitable for almost all gases including propane, butane, hydrogen and acetylene. The temperature of each cylinder is measured on the filling rig to help detect fault conditions in filling, to calculate the final filled volume (in conjunction with the pressure), to ensure the volume is repeatable, and to improve the filling rate.

Automotive Painting

Solvents in automotive painting can lead to the presence of a hazardous gas Zone. The intrinsically safe ExTempMini may be used to measure the temperature of containers and vessels, the surface temperature of liquids, and the temperature of painted surfaces.

Offshore

The stainless steel 316 housing of the ExTempMini's sensing head, and its intrinsically safe certification, make it well-suited for use on offshore platforms.

Technical Information
Measurement Temperature Range	-20°C to 1000°C (see table of Model Numbers)
Output	Two-wire 4 to 20 mA (loop powered)
Minimum Temperature Span	100°C
Maximum Temperature Span	1000°C
Field of View	See table of Model Numbers
Accuracy	± 1°C or 1% of reading, whichever is greater
Repeatability	± 0.5°C or 0.5%, whichever is greater
Emissivity Setting Range	0.20 to 1.00 (pre-set to 0.95)
Emissivity Setting Method	User configurable via optional USB / RS-485 adapters
Response Time, t90	240 ms (90% response)
Spectral Range	8 to 14 μm
Supply Voltage	12 to 24 V DC ± 5%
Minimum Sensor Voltage	11.4 V DC
Maximum Current Draw	25 mA

Mechanical
	Main Enclosure	Sensing Head
Construction	Painted aluminium	Stainless Steel 316
Major Dimensions	99 x 65 x 35 mm	Ø 20 x length 69 mm including cable gland (see Dimensions)
Mounting	2 x mounting holes, use M4 socket head screws	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 5 m Cable	TBD	TBD
Cable Connections	Removable screw terminal blocks (see Connections). Conductor size 22 AWG to 14 AWG (0.326 mm² to 2.08 mm²)	-
Output Cable Gland	Suitable for cable diameters 3.5 to 7.0 mm	-

Hazardous Area Classification
	Main Enclosure	Sensing Head
Ambient Temperature Rating	-20°C ≤ Ta ≤ 70°C	-20°C ≤ Ta ≤ 115°C	-20°C ≤ Ta ≤ 180°C
ATEX Classification	Ex II 2 G	Ex II 1 G	Ex II 1 G
IECEx Classification (Gas)	Ex ia [ia Ga] IIC T4 Gb	Ex ia IIC T4 Ga	Ex ia IIC T3 Ga

Maximum DC Input Voltage		Ui = 28 V
Maximum Input Current		Ii = 93 mA
Maximum Input Power		Pi = 0.651 W
Maximum Internal Capacitance		Ci = 5.17 nF
Maximum Internal Inductance		Li = 1.99 μH
ATEX Certificate Number		CML 22ATEX2007X
IECEx Certificate Number		IECEx CML 22.0001X
JapanEx Certificate Number		CML 22JPN2009X
UKCA Certificate Number		CML 22UKEX2008X

Environmental Specifications
	Main Enclosure	Sensing Head
Environmental Rating	IP65 (NEMA 4)
Ambient (Operating) Temperature Range	0°C to 70°C	0°C to 180°C
Ambient Pressure Range	80 kPa (0.8 bar) to 110 kPa (1.1 bar)
Relative Humidity	Max. 95% non-condensing
CE Marked	Yes
RoHS Compliant	Yes

Electromagnetic Compatibility Standards

Conforms to EN 61326-1, EN 61326-2-3 (Industrial).

Reduce downtime thanks to fast response time and high stability

ExTempMini intrinsically safe non-contact infrared temperature sensors measure the temperature of an area of the surface of a solid or liquid, and transmit this as a linear 4-20 mA output.

Features

Suitable for gas hazardous areas, Zone 0, 1 and 2 (sensing head) with a suitable Intrinsically Safe isolator
Miniature sensing head for use in high ambient temperatures up to 180°C
Temperature range: -20°C to 1000°C
Two wire, 4-20 mA output
Rescalable output and adjustable emissivity setting via optional USB and RS-485 adapters
Fast response time and high stability
Stainless steel 316 housing on sensing head - ideal for offshore applications
IP65 sealed
Supplied with up to 25 m sensing head cable

Calex ExTempMini - Infrared Temperature Sensor for High Ambient Temps

Reduce downtime thanks to fast response time and high stability

Features

Typical Applications

Petrochemical - Condition Monitoring

Automotive Painting

Offshore

Technical Information

Mechanical

Hazardous Area Classification

Environmental Specifications

Electromagnetic Compatibility Standards

Reduce downtime thanks to fast response time and high stability

Features

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