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Thermalert 4.0 in plastic applications

Thermalert 4.0 Series Pyrometers

Smart infrared sensors to take temperature data and process control to the next level

Thermalert 4.0 Pyrometer - Control Engineering Engineers' Choice Awards Finalist 2019
Thermalert 4.0 Pyrometer with housing
Thermalert 4 Back Panel

Rugged, smart and easy-to-install

  • Improve process control with wide choice of spectral ranges and focus distances designed specifically for your application
  • Reduce setup time with plug-and-play technology and integrated laser sighting
  • Protect your process and employees with intrinsically safe ATEX/IECEx/CCC-IS certification
  • Choose from options of analogue and digital communication protocols

Designed for harsh environments, Thermalert 4.0 Series Pyrometers provide accurate, real-time temperature measurements for process control applications spanning metals, plastics, glass, oil and gas, food and more. This robust solution comes in a compact, integrated package that is easy to install and operate, so you can take your process control to the next level.

  • At a Glance
  • Technical Specs
  • Applications
  • Accessories
  • Resources

The Thermalert 4.0 Series Pyrometers from Fluke Process Instruments include numerous integrated infrared temperature sensors with our widest selection of spectral ranges that can be used for a wide variety of process control applications.

Each pyrometer conforms to Industry 4.0 standards, combines innovative digital technology with standard two-wire installations for all setups and can be ordered with ATEX and IECEx certification. With multiple communication options, this smart infrared measurement sensor provides the features you need to understand your temperature data and control your unique process in a compact, integrated package that is easy to install and operate.

Thermalert 4.0 Pyrometers

With the ability to withstand ambient temperatures up to 85°C (185°F) without extra cooling, as well as multiple wavelength options to support a broad range of applications, Thermalert 4.0 Series Pyrometers can provide a complete picture of even the harshest environments.

Each pyrometer is designed with best-in-class optical resolution, which varies based on the application, and multiple communication options to meet your process requirements – including 2-wire loops powered by RS485, digital outputs (Ethernet, EthernetIP, ProfinetIO) and analog outputs.

Laser sighting, ATEX/IECEx certification and a broad range of accessories (including high temperature enclosures) are also available for all models.

Key Features:

  • Durable stainless steel IP65 / NEMA4 enclosures
  • Read temperature ranges from -40 °C to 2300 °C (-40 ºF to 4172 °F)
  • Withstands ambient temperatures from -20 °C to 85 °C (-4 °F to 185°F)
  • Intrinsically safe models (ATEX/IECEx/CCC-IS certification)
  • Integrated laser sighting
  • Galvanic isolated outputs
  • Plastic lens option for food applications
  • Analog input for ambient compensation and adjusting emissivity setting
  • Multiple communication interfaces:
    • 2-wire loop powered for analog communication
    • 2-wire loop options specifically for HART protocols
    • 4-wire (Fieldbus Support – Ethernet, EthernetIP, ProfinetIO)
    • 12-wire M16 and 6-pin terminal block for digital communication (RS485)
  • Advanced signal processing
  • Wide choice of focus distances

DataTemp® Multidrop Software

Thermalert 4.0 infrared sensors can be integrated with your process control system with the DataTemp® Multidrop Software. Each software solution provides you with the tools you need to “plug and play,” by quickly configuring your sensors and then monitoring temperatures with a real-time graphical display.

The software’s bar graph feature shows temperature profiles at various spots across your process. The program can also record and archive process temperatures, as well as show high- and low-alarms, making it easy to identify when conditions are beyond your set parameters.

Technical Specs for Thermalert Models: LT, G5, G7, P7, P3

Model Number
LT
G5
G7
P7
P3
Temperature Range
-40 to 1000ºC
(-40 to 1832ºF)
250 to 2250ºC
(482 to 4082ºF)
300 to 900ºC
(572 to 1652ºF)
10 to 360ºC
(50 to 680ºF)
25 to 450ºC
(77 to 842ºF)
Spectral Response
8 to 14 µm
5 µm
7.9 µm
7.9 µm
3.43 µm
System Accuracy
for Tmeas > 0°C (32°F):  ±1% of reading or ±1.0°C (2.0°F)
for Tmeas ≤ 0°C (32°F): ±[1.0°C + 0.1* (0°C – Tmeas )] with Tmeas in °C;
±[2.0°F + 0.1* (32°F – Tmeas )] with Tmeas in °F
for Tmeas > 75°C (167°F): ±(3°C + 1% of reading)
Repeatability
±0.3°C (0.6°F) or 0.3% of reading
±1°C (2°F) or 0.5% of reading
Response Time
LT-07, LT-15, LTD-04: 150ms
LT-30, LTB-30: 30ms
LT-50, LT-70: 130ms
G5-30, G5-70: 60ms
G7-70: 130ms
P7-30: 130ms
P3-20: 130ms
Optical Resolution (D:S)
LTD-04: 4:1
LT-07: 7:1
LT-15: 15:1
LT-30, LTB-30: 33:1
LT-50: 50:1
LT-70: 70:1
G5-30: 33:1
G5-70: 70:1
G7-70: 70:1
P7-30: 33:1
P3-20: 20:1
Focus Distance
LT-07:
CFO 50mm (2in)
LT-15, LTD-04:
SFO 1520mm (60in)
LT-30, LTB-30:
SFO 1520mm (60in)
CF1 76mm (3in)
CF2 200mm (7.9in)
LT-50:
SFO 1520mm (60in)
CF2 200mm (7.9in)
LT-70:
SF2 1250mm (49in)
CF2 200mm (7.9in)
G5-30:
SFO 1520mm (60in)
G5-70:
SF2 1250mm (49in)
G7-70:
SF2 1250mm (49in)
P7-30:
SF0 1520mm (60in)
P3-20:
SF4 500mm (20in)
Smallest Measurement Spot
LT-07:
CF 7.1mm (0.28in)
LT-30, LTB-30:
CF1 2.3mm (0.09in)
CF2 6.1mm (0.24in)
LT-50:
CF2 4mm (0.16in)
LT-70:
SF2 17.9mm (0.7in)
CF2 2.9mm (0.11in)
G5-70:
SF2 17.9mm (0.7in)
G7-70:
SF2 17.9mm (0.7in)
 

 

Technical Specs for Thermalert Models: MT, HT, 3M, 2M, 1M

Model Number
MT
HT
3M 
2M 
1M 
Temperature Range
250 to 2250ºC
(482 to 4082ºF)
500 to 2000ºC
(932 to 3632ºF)
100 to 600ºC
(212 to 1112ºF)
250 to 1400ºC
(482 to 2552ºF)
500 to 2300ºC
(932 to 4172ºF)
Spectral Response
3.9 µm
2.2 µm
2.3 µm
1.6 µm
1 µm
System Accuracy
for Tmeas > 0°C (32°F):  ±1% of reading or ±1.0°C (2.0°F)
for Tmeas ≤ 0°C (32°F): ±[1.0°C + 0.1* (0°C – Tmeas )] with Tmeas in °C;
±[2.0°F + 0.1* (32°F – Tmeas )] with Tmeas in °F
±(2°C + 0.5% of reading)
Repeatability
±0.3°C (0.6°F) or 0.3% of reading
±1°C (2°F) or 0.25% of reading
Response Time
MT-30, MT-70:
130 ms
HT-60:
130 ms
3M-70:
20ms
2M-150, 1ML-150, 1MH-150:
10ms
Optical Resolution (D:S)
MT-30:
33:1
MT-70:
70:1
HT-60:
60:1
3M-70:
70:1
2M-150, 1ML-150, 1MH-150:
150:1
Focus Distance
MT-30:
SF0 1520mm (60in)
CF1 76mm (3in)
CF2 200mm (7.9in)
MT-70:
SF2 1250mm (49in)
CF1 76mm (3in)
CF2 200mm (7.9in)
HT-60:
SFO 1520mm (60in)
CF1 76mm (3in)
CF2 200mm (7.9in)
3M-70:
SFO 1520mm (60in)
CF2 200mm (7.9in)
2M-150, 1ML-150, 1MH-150:
SFO 1520mm (60in)
CF2 200mm (7.9in)
Smallest Measurement Spot
MT-30:
CF1 2.3 mm (0.09 in)
CF2 6.1 mm (0.24 in)
MT-70:
SF2 17.9 mm (0.7 in)
CF1 1.1 mm (0.04 in)
CF2 2.9 mm (0.11 in)
HT-60:
CF1 1.3mm (0.05in)
CF2 3.3mm (0.13in)
3M-70:
CF2 2.9mm (0.11in)
2M-150, 1ML-150, 1MH-150:
SFO 10.1mm (0.4in)
CF2 1.3mm (0.05in)

 

Thermalert 4.0 Pyrometers can be used across numerous industries and are ideal for process monitoring and control, product monitoring and more in applications spanning metals, plastics, oil and gas, glass and food. Several examples of where Thermalert 4.0 can be used include, but are not limited to, the following list below. Click here if you would like to speak with an expert to discuss your application

Thermalert 4.0 Model
Spectral Response
Applications
LT
8-14 µm
Thick plastics, asphalt, carpeting, coated paper, thermoforming, food, coke, coal, cement
G5
5 µm
Glass surface temperature for bending, tempering, annealing and sealing
G7
7.9 µm
Ultra-thin drawn glass
P3
3.43 µm
Extrusion and converting of thin films: polyethylene, polypropylene, and polystyrene
P7
7.9 µm
Production and converting of films of polyester (PET), fluoroplastic, Teflon®, acrylic, nylon (polyamide)
MT
3.9 µm
Furnace refractory, flame hardening and brazing
HT
2.2 µm
Ferrous and nonferrous metals, induction heating, furnaces, laboratory research
1M
1 µm
Semiconductor, metals forging, molten glass
2M
1.6 µm
Non ferrous and unoxidized metals, galvanizing lines and steel annealing
3M
2.3 µm
Rolling mills, wire coating and annealing, laser welding, plastic tubing extensions

Atex certification and related applications

Industry Application Atex Type of Certification
Steel
Galvanizing, annealing, plating and coating with hydrogen atmosphere
Gas
II 2G Ex ib IIC T4 Gb
Solar
Hydrogen reduction
Gas
II 2G Ex ib IIC T4 Gb
Petrochemical
Sulfur recovery, boilers, crackers, reactors, pipes, flare control
Gas
II 2G Ex ib IIC T4 Gb
Chemical
Fertilizer, starch, alcohols, flour, vinyl
Gas
II 2G Ex ib IIC T4 Gb
Fire detection Offshore installations, storage areas, indoor coke handling, dust extraction
Dust
II 2D Ex ib IIIC T135°C Db IP65
Storage terminals Storage of coal, wood pellets, sulfur, petroleum coke, starch, fluids
Dust
II 2D Ex ib IIIC T135°C Db IP65
Lens Protectors and Air Purge Collars

Lens protectors and air purge collars are independent accessories that help ensure dust, moisture and airborne particles are kept away from the pyrometer lens.

Water- or Air-Cooled Housing

The water- and air-cooled housing options can be specified for use in ambient temperatures up to 175°C (315°F).

ThermoJacket

For harsher environments, the ThermoJacket can protect the sensor in ambient temperatures of up to 315°C (600°F). It completely encloses the pyrometer, combining thermal and mechanical protection while air purging the lens. Pyrometers can be installed or removed while the ThermoJacket is in its mounted position.

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