ExTemp Intrinsically Safe Infrared Temperature Sensor, ATEX and IECEx – IOThrifty

Free Shipping! - USA Orders Over $75, Canada Orders Over $125

ExTemp Intrinsically Safe Infrared Temperature Sensor, ATEX and IECEx Certified
Extemp and LCT-485 network layout example
Extemp and LCT-485 network layout example
Connection diagram for the ExTemp intrinsically safe pyrometer
Connection diagram for the ExTemp intrinsically safe pyrometer
Loop Configuration Tool (USB adapter) for the ExTemp ATEX
Loop Configuration Tool (USB adapter) for the ExTemp ATEX
Calex Config main screen
Calex Config main screen
Calex Config graph
Calex Config graph

ExTemp Intrinsically Safe Infrared Temperature Sensor, ATEX and IECEx Certified

Regular price $749.00 Sale SKU:IR-CA-EX-21-LT-C-5
Ships in 5 weeks

  •  Temperature range: -20°C to 1000°C
  • ATEX and IECEx certified up to Zone 0 (gas) and Zone 20 (dust)
  • TIIS certified for use in Japan
  • 4-20 mA output, two-wire, loop-powered
  • Optional RS-485 network adapter and USB configuration tool
  • Supplied with up to 25 m cable
  • Cable may be extended even further (subject to safety requirements) - cable runs could extend all the way back to the control room
  • Stainless steel 316 housing, ideal for offshore applications

The ExTemp is an intrinsically safe pyrometer. It measures the temperature of surfaces in hazardous areas without contact, and provides a direct 4-20 mA output. It is certified to ATEX, IECEx and TIIS standards.
Explosion proof pyrometers typically have bulky, expensive housings, however because the ExTemp uses Intrinsic Safety as the method of protection, it is compact and low-cost.

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 precision 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 ExTemp 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 safety barrier or isolator. All models have been certified Intrinsically Safe for use in gas and dust hazardous areas by Certification Management Ltd. They comply with the European ATEX Directive 2014/34/EU and are covered by certificates for IECEx (international), TIIS (Japan) and UKCA (United Kingdom).

All models of the ExTemp have been issued an ATEX (CML 14ATEX2079) Certificate for use in both gas and dust explosive atmospheres in above ground installations.

Voltage MUST be supplied by a suitably rated safety barrier or isolator. For re-configuration of the sensor, the LCT MUST be connected in the safe area, behind the protection of a safety barrier or isolator

To Order

Select the following options from the drop down box at the top of the page

1) Field of View

  • 2:1:Divergent Optic
  • 15:1 Divergent Optics
  •  30:1 Divergent Optics
  •  Close Focus

2) Temperature Range

  • -20°C to 100°C
  •  0°C to 259°C
  • 0°C to 500°C
  • 0°C to 1000°C
  • Special Temperature Range (temperature range is scalebable  from -20°C to 1000°C via optional adapters and software)

3) Cable Length

  • 5m
  • 10m
  • 25m
Contact IOThrifty for information on longer cable lengths



LCT Loop Configuration Tool (USB Adapter)
All ExTemp models are fully configurable via the optional USB adapter (must only be connected on the safe side of the isolator or barrier). The free Windows-compatible configuration software allows the user to rescale the 4-20 mA output, adjust the emissivity setting, and configure averaging, hold processing and reflected energy compensation. The adapter is connected to the measurement loop via mini-hook connectors.  When using the LCT adaptor the free downloadble Calex Config Software may be used for configuration of the sensor and display of the measurement.

LCT Loop Configuration Tool (USB Adapter)

LCT-485   RS-485 Network Interface
This DIN rail-mounted unit provides RS-485 Modbus RTU Slave communications for one ExTemp sensor. It must only be connected on the safe side of the isolator or barrier. It allows up to 224 ExTemp sensors to be connected together in a network.

Air Purge Collar  APM (for sensors with 15:1, 30:1, Close Focus optics), APMW (for sensors with 2:1 optics)
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.

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

ABL  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.


ExTemp Data Sheet
ExTemp Sensor and LCT User Manual
LCT-485 User Manual
ExTemp Guide to Certification and Installation (Application Guide)
ExTemp ATEX Certificate CML 14ATEX2079
ExTemp IECEx Certificate CML14.0032
ExTemp TIIS Certificate


Hazardous Area Classification
ATEX Classification: Ex II 1GD
IECEx Classification (Gas): Ex ia IIC T4 Ga
IECEx Classification (Dust): Ex ia IIIC T135°C IP65 Da
Ambient Temperature Rating: -20°C = Ta = 70°C
Maximum DC Input Voltage: Ui = 28 V
Maximum Input Current: Ii = 93 mA
Maximum Input Power: Pi = 650 mW
Maximum Internal Capacitance: Ci = 8 nF
Maximum Internal Inductance: Li = 0 mH
ATEX Certificate Number: CML14ATEX2079
IECEx Certificate Number: IECEx CML 14.0032
TIIS Certificate Number: TC21097

General Specifications
Temperature Range: Configurable from -20°C to 1000°C via optional USB adapter; pre-set to a choice of ranges between these limits (see Ordering)
Maximum Temperature Span: 1000°C
Minimum Temperature Span: 100°C
Output: 4 to 20 mA, Optional USB configuration tool and RS-485 network interface available
Accuracy: ± 1°C or 1%, 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 modules
Response Time, t90: 240 ms (90% response)
Spectral Range: 8 to 14 µm
Supply Voltage: 12 to 24 V DC ± 5%
Maximum Current Draw: 25 mA
Maximum Loop Impedance: See Application Guide (available separately)

 Mechanical Specifications
Construction: Stainless Steel 316
Major Dimensions:Ø 20 mm x length 150 mm (see Installation)
Mounting: M20 x 1.5 mm thread, length 46 mm, supplied with two mounting nuts
Cable Length: 5 m, 10 m or 25 m as standard (custom lengths are also available)
Weight with 5 m Cable: 475 g

Environmental Specifications
Environmental Rating: IP65 (NEMA 4)
Ambient Temperature Range: 0°C to 70°C (Operating range)
Relative Humidity: Max. 95% non-condensing
CE Marked: Yes
RoHS Compliant: Yes

Field of View
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 ExTemp detects only the wavelengths of infrared radiation that are not absorbed by the atmosphere.

ExTemp 15:1 Field of ViewExTemp 2:1 Field of View

ExTemp 30:1 Field of ViewClose Focus Field of View