Single Wavelength Infrared
Temperature Sensors
Single Wavelength Temperature Sensors
  • Single
    Wavelength
    Sensors
  • PRO
    40
     
  • PRO
    50
     
  • TempMatic
    4000
       



Single-Wavelength sensors provide the average temperature of the measured target area. Short wavelength sensors are recommended to reduce or eliminate errors due to emissivity variation.  They are offered in a variety of configurations with a wide selection of temperature ranges, optics, and spectral response options.  The PRO 42 and 52 models feature a unique auto null design that enables more accurate measurements with short-wavelengths at low temperatures.

High Performance Features:

  • Temperature limits 0-4500°F (0-2500°C)
  • Accurate, reliable, repeatable measurements
  • Wide selection of temperature ranges, optics and spectral response options
  • Infrared filtering for glass, plastic and flame insensitivity
  • Visual, laser, and fiber optic alignment options
  • Auto null balancing for drift free operation
  • Fiber optics with low temperature capabilities (150°F/75°C or greater)
  • A variety of installation and protective accessories

The PRO 42 and 52 models feature a unique auto null design that enables the use of short wavelengths at temperatures as low as 100°F (40°C). This feature enables more accurate and repeatable measurements on applications such as cold rolled steel and low temperature induction heating applications where the metal surface has a low or varying emissivity and the temperatures are below 500°F (260°C).

Applications:
  • Steel
  • Heat Treating
  • Rotary Kilns
  • Glass
  • Petrochemical
  • Paper
  • Plastics

PRO 40 Visual Alignment

The PRO 40  Single-Wavelength Sensors with Visual Alignment are used to measure
most common materials in general purpose applications. 
Standard Features:
  • Broad Temperature Ranges, 
    Precise Optics, and Short Operating Wavelengths
  • Short Wavelength Spectral Response
  • Visual Aiming
    (for Fiber Optic choose PRO 50)
  • Optional through the lens
    laser aiming 
  • An Intuitive text based user interface
  • Programmable outputs and alarms for measured target and ambient temperatures
  • Bi-directional RS485 and RS232 communications
  • Advanced system diagnostics and status messages
  • Rugged, Corrosion Resistant NEMA 4x (IP65) Enclosures
  • Stand alone and system configurations
  • A wide selection of accessories
Unique Features:

The PRO 42 models feature a unique auto null design that enables more accurate measurements on applications such as cold rolled steal and low temperature induction heating processes where the temperatures can go as low as 100°F (40°C) and the surface has a low or varying emissivity.

For most applications, the selection of the sensor is based on the temperature range and the optics that meet the requirements of the application.  However, some applications require careful selection of the sensor’s operating wavelength in order to obtain accurate measurements.  Frequently, the selection of a specific narrow band filter will result in a narrower temperature range for the sensor, but the benefit can be dramatic improvements in the accuracy and repeatability of temperature measurements.  Thoughtful wavelength selection is important in the following applications:
  • visually transparent materials, like glass or plastics
  • the ability to measure through flames
  • the ability to minimize the interference of water vapor or background reflections
PRO 40 SERIES – Visual, Single Wavelength Sensors
Model Operating Wavelength Temperature Range Optical Resolution
Fahrenheit Celsius
Sensors for Thin Film Plastic Applications – Oil Based Coatings, Nylon, Polypropylene, Polyethylene, Polystyrene, Polybutylene, Cellophane, Ionomers
43-10 (1) 3.40 to 3.46 µm 125-1000°F 50-300°C D/14
43-30 3.40 to 3.46 µm 250-1500°F 125-425°C D/40
43-40 3.40 to 3.46 µm 300-2500°F 150-560°C D/100
Sensors for Low Temperature Applications – low temperature metal processing operations like cold rolled steel or low temperature heat treating
42-05 (1) 2.8 to 3.3 µm 75-400°F 25-200°C D/14
42-10 2.8 to 3.3 µm 125-800°F 50-425°C D/50
42-20 2.8 to 3..3 µm 150-800°F 65-425°C D/100
42-30 2.0 to 2.5 µm 150-800°F 65-425°C D/50
Sensors for Medium & High Temperature Applications – steel mills, foundries, heat treating, forging, and semi-conductor processing
42-40 2.0 to 2.5 µm 450-2500°F 230-1375°C D/100
41-20 1.5 to 1.65 µm 500-2100°F 260-1150°C D/100
41-30 1.5 to 1.65 µm 700-3200°F 375-1750°C D/100
41-50 0.8 to 1.0 µm 1000-2500°F 540-1375°C D/100
41-60 0.8 to 1.0 µm 1200-3200°F 650-1750°C D/100
41-70 0.8 to 1.0 µm 1400-4500°F 760-2475°C D/150
(1) These models require a special enclosure for custom optical components.

Options and Accessories:
  • 21 - Remote Interface Module with Power Supply
  • PS - Universal Power Supply
  • AP - Air Purge
  • WCAP - Water Cooling Air Purge
  • SB - Swivel Bracket
  • LA - Laser Aiming
Resources:

PRO Series Brochure (PDF)

Single Wavelength Temperature Systems Brochure (PDF)

PRO 40 & 50 Datasheet (PDF)

Application Worksheet (PDF)

PRO 50 Fiber Optic Alignment


The PRO 50 Single-Wavelength Sensors with Fiber Optics are used to measure most common materials in general purpose applications.  With the fiber optic configuration, it is possible to view a target and mount the sensor electronics in a remote or more convenient location.  This provides greater durability and flexibility with sensor installations that involve confined spaces and/or severe environments. 
Standard Features:
  • A wide selection of temperature ranges and optics
  • Fiber optic alignment with a small, sealed fiber cable
  • Optional Integrated Aim Light to verify alignment 
  • An Intuitive text based user interface
  • Programmable outputs and alarms for measured target and ambient temperature
  • Bi-directional RS485 and RS232 communications
  • Advanced system diagnostics and status messages
  • Rugged, corrosion resistant NEMA  4 / IP65 Enclosures
  • Stand alone and system configurations
  • A wide selection of accessories
Unique Features:

All of Williamson’s fiber optic sensors use a small, sealed fiber optic cable with an ambient limit of 400°F (200°C) to enable access to difficult to reach targets and to survive hostile operating conditions.  In addition, Williamson offers several unique fiber cable options that can enable measurements on applications that were previously considered difficult to measure.  This includes the ArmorGuard System, the Stainless Steel Braid System, and the Gooseneck System.

The PRO 52 models feature a unique auto null design that enables more accurate measurements on applications such as cold rolled steel and low temperature induction heating processes where the temperatures can go as low as 100°F (40°C) and the surface has a low or varying emissivity.

PRO 50 SERIES – Fiber Optic, Single Wavelength (1 l ) Sensors
Model Operating Wavelength Temperature Range Optical Resolution Cable Type Max Length
Fahrenheit Celsius No Lens Std Res. Hi Res. (1)
Sensors for Low Temperature Applications – low temperature metal processing operations like cold rolled steel or low temperature heat treating
52-35 2.0-2.5 µm 200-800°F 95-425°C D/2, D/12, D/50 Quartz 3ft / 91cm
Sensors for Medium & High Temperature Applications – steel mills, foundries, heat treating, forging, and semi-conductor processing
52-40 2.0-2.5 µm 450-2500°F 230-1375°C D/2, D/50, D/75 Quartz 30ft / 9.1m
51-10 1.5-1.65 µm 450-1800°F 260-980°C D/2, D/12, D/50 Quartz 3ft / 91cm
51-20 1.5-1.65 µm 500-2100°F 315-1150°C D/2, D/50, D/75 Quartz 10ft / 3m
51-30 1.5-1.65 µm 700-2750°F 375-1500°C D/2, D/50, D/75 Quartz 30ft / 9.1m
51-50 0.8-1.0 µm 1000-2500°F 550-1375°C D/2, D/12, D/50 Glass 3ft / 91cm
51-60 0.8-1.0 µm 1200-3000°F 650-1650°C D/2, D/50, D/75 Glass 10ft / 3m
51-70 0.8-1.0 µm 1400-4500°F 750-2475°C D/2, D/50, D/75 Glass 30ft / 9.1m
(1) The High Resolution optics require a larger lens barrel in order to obtain the smaller spot size.

Options and Accessories:
  • 21 – Remote Interface Module with Power Supply
  • PS – Universal Power Supply
  • AL – Integrated Aim Light
  • FOSB – Fiber Optic Swivel Bracket
  • AP - Air Purge
  • WCAP - Water Cooling Air Purge
  • AG - ArmorGuard System
  • SSB - Stainless Steel Braid System
  • GN - Gooseneck System
Resources:

 PRO Series Brochure (PDF)

Single Wavelength Temperature Systems Brochure (PDF)

PRO 40 & 50 Datasheet (PDF)

Application Worksheet (PDF)

TempMatic 4000 Visusl Alignment




TempMatic 4000 Single-Wavelength Sensors with Visual Aiming  are used to measure most common materials in general purpose applications
Standard Features:
  • A wide selection of temperature
    ranges and optics
  • A variety of Spectral response options that include infrared filtering for glass, plastic,
    and flame insensitivity
  • Visual Aiming
  • Optional Laser Aiming
  • Rugged, corrosion resistant
    NEMA 4 / IP65 enclosures
  • Stand alone and system configurations
  • A wide selection of accessories
Unique Features:

For most applications, the selection of the sensor is based on the temperature range and the optics that meet the requirements of the application.  However, some applications require careful selection of the sensor’s operating wavelength in order to obtain accurate measurements.  Frequently, the selection of a specific narrow band filter will result in a narrower temperature range for the sensor, but the benefit can be dramatic improvements in the accuracy and repeatability of temperature measurements.  Thoughtful wavelength selection is important in the following applications:
  • visually transparent materials, like glass or plastics
  • the ability to measure through flames
  • the ability to minimize the interference of water vapor or background reflection
TempMatic 4000 SERIES – Visual, Single Wavelength Sensors
Model Operating Wavelength Temperature Range Optical Resolution
Fahrenheit Celsius Std Res. High Res.

Sensors for General Purpose Applications - Paper, textiles, food, rubber, and others

4900A 8-14 µm 0-500°F 0-250°C D/60 D/80
4900B 8-14 µm 0-1000°F 0-550°C D/60 D/80
4900C 8-14 µm 200-1000°F 100-550°C D/60 D/80
4900D 8-14 µm 300-2000°F 150-1100°C D/60 D/100

Sensors for Viewing through Flames – Measures inside furnaces and combustion chambers where flames are present, like kilns and reheat furnaces

4400LT 3.7-3.9 µm 400-1400°F 200-750°C D/60 N/A
4400A 3.7-3.9 µm 600-1800°F 300-975°C D/60 N/A
4400B 3.7-3.9 µm 800-2200°F 425-1200°C D/100 N/A
4400C 3.7-3.9 µm 1200-3000°F 650-1650°C D/100 D/150
4400D 3.7-3.9 µm 2000-4000°F 1100-2200°C D/100 D/150

Sensors for Measuring Glass – Measures glass surface temperature and inside furnaces where quartz infrared heaters are used

4500A 4.9-5.3 µm 200-1000°F 100-550°C D/60 N/A
4500B 4.9-5.3 µm 500-1500°F 250-800°C D/100 N/A
4500C 4.9-5.3 µm 500-1500°F 250-1375°C D/100 D/150
4500D (1) 4.9-5.3 µm 1000-4000°F 550-2200°C D/100 N/A

Sensors for Measuring Plastics – Measures plastic films and coatings

4800A 7.6-8.4 µm 85-600°F 30-300°C D/60 N/A
4800B 7.6-8.4 µm 200-1000°F 100-550°C D/60 D/80
4800C 7.6-8.4 µm 500-1500°F 250-800°C D/100 D/150
4800D 7.6-8.4 µm 500-2500°F 250-1375°C D/100 D/150
(1) Operating Wavelength for CO2 Gases to measure flames

Options and Accessories:
  • 20 – Remote Display with power supply
  • 22 – Remote Display with 2 relays and a power supply
  • PS110 or PS220 – AC Power Supply
  • LA – Laser Aiming
  • SB – Swivel Bracket
  • AP - Air Purge
  • WCAP - Water Cooling Air Purge
Resources:

 PRO Series Brochure (PDF)

Single Wavelength Temperature Systems Brochure (PDF)

Application Worksheet (PDF)