Two-Wire Infrared
Temperature Sensors
Two-Wire Temperature Sensors
  • Two-Wire
    Temperature
    Sensors  
  • TransTemp
    200, 300
    & 400  
  • TransTemp
    500, 700
    &1000  
  • FiberView
    1000
       
These two-wire sensors use a single-wavelength design that provides the average temperature of the measured target area.  They are offered in a variety of mechanical configurations with a wide selection of temperature ranges and spectral response.  Short-wavelength sensors are recommended to reduce or eliminate errors due to emissivity variation.  These models offer superior value for multi-unit and OEM applications.
 
High Performance Features:
  • Temperature limits of -50 - 4500°F (-45 - 2500°C)
  • Accurate, reliable, repeatable measurements
  • Wide selection of temperature ranges and spectral response options
  • Infrared filtering for glass, plastic, and flame insensitivity
  • Quick and easy to install with 2-wire loop powered design
  • Low cost, compact, and rugged designs
  • A variety of configurations and accessories
Applications:

These two-wire temperature sensors can be used for temperature monitoring or process control with applications involving most common materials. They are designed to provide high performance and low maintenance operation in demanding industrial environments.
Typical applications include:
  • Steel
  • Heat Treating
  • Rotary Kilns
  • Glass
  • Petrochemical
  • Paper
  • Plastics

These three sensor families offer a variety of options for measuring most common materials in low temperature (0-1000°F / 0-500°C) applications
Standard Features:
  • Broad temperature ranges -40 to 932°F (-40 to 500°C)
  • 8-14um operating wavelength
  • Line of Site and (optional Laser Sighting Tool)
  • D/2 and D/20 optics
  • Two-Wire 4-20mA output
  • Compact design with a rugged stainless steel enclosure (NEMA 4 / IP65)
  • A wide selection of accessories
Unique Features:

200 Series - Fixed sensor settings with and emissivity value of 0.95 and a 250ms response time.  In addition to the two-wire 4-20mA output, there are seven optional four-wire mV outputs including Type J and K Thermocouple outputs.

300 Series   - Modular design with miniature sensing head that withstands ambient temperatures as high as 160°F (70°C), and like the 200 Series it includes the optional mV outputs.

400 Series Includes Calex link PC software to configure the sensor's temperature range, emissivity, and signal conditioning functions that include average, maximum, minimum, and instantaneous readings, plus peak and valley hold.

TRANSTEMP 200, 300, & 400 SERIES - Two-Wire Single Wavelength
Sensors - Two-Wire Single Wavelength
Model Temperature Range Optical Resolutions
Celsius Fahrenheit Near Far
200 Series iV Compact Sensor with 4-20mA or mV output and a fixed emissivity of 0.95
290-1 -20 - 100°C -4 - 212°F 2:1 20:1
290-2 0 ¡V 250°C 32 - 482°F 2:1 20:1
290-3 0 ¡V 500°C 32 - 932°F n/a 20:1
300 Series ¡V Miniature, Two-Piece Sensor with 4-20mA or mV output and a fixed emissivity of 0.95
390-1 -20 - 100°C -4 - 212°F 2:1 20:1
390-2 0 - 250°C 32 - 482°F 2:1 20:1
390-3 0 - 500°C 32 - 932°F n/a 20:1
400 Series ¡V High Performance Sensor with 4-20mA output and adjustable sensor settings such as emissivity and other signal conditioning parameters via PC based Calex Link software that is included with every sensor
490-4 -20 - 500°C -4 - 932°F 7:1 20:1
490-5 -40 - 500°C -40 - 932°F n/a 20:1

Options and Accessories:
  • Fixed mounting bracket
  • Adjustable mounting bracket
  • Air Purge
  • Water Cooling Air Purge
  • Laser Sighting Tool
  • Longer Electrical Cable (5m Max)
Resources:

TransTemp Series Brochure (PDF)

Application Worksheet (PDF)



These three sensor families offer a variety of options to measure most common materials in general purpose applications.

Standard Features:

  • A wide selection of temperature ranges and operating wavelengths
  • Infrared filtering for glass, plastic and flame insensitivity
  • Line of Site Alignment
  • D/7, D/15, and D/20 optics (all models)
  • Two-Wire 4-20mA output
  • Compact designs with a rugged NEMA 4 / IP65 enclosures
  • A wide selection of accessories
Unique Features:

500 Series -  Compact, self contained sensor with a fixed mounting bracket and a built in emissivity adjustment. 

700 Series  - Modular design with miniature sensing head and a remote circuit board.  Includes built in adjustments for emissivity, response time, and peak hold.  

1000 Series – Rugged, self contained sensor with built LCD temperature display and an adjustable swivel mounting bracket.  Includes built in adjustment for response time or peak hold. 

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
TRANSTEMP 500, 700, & 1000 SERIES –
Two Wire Single Wavelength Sensors
Model (1) Operating
Wavelength 		TEMPERATURE RANGE
Fahrenheit Celsius

Sensors for General Purpose Applications - Paper, textiles, food, rubber, and others
590LT, 790LT, 1900LT 8.0-14.0 µm -50-200°F -45-100°C
590A, 790A, 1900A 8.0-14.0 µm 0-500°F 0-250°C
590B, 790B, 1900B 8.0-14.0 µm 0-1000°F 0-550°C
590C, 790C, 1900C 8.0-14.0 µm 200-1000°F 100- 550°C
590D, 790D, 1900D 8.0-14.0 µm 300-2000°F 150-1100°C

Sensors for Medium & High Temperature Applications – steel mills, foundries, heat treating, forging, and semi-conductor processing
520A, 720A, 1200A 2.0-2.5 µm 500-1100°F 250-575°C
520B, 720B, 1200B 2.0-2.5 µm 700-1500°F 375-800°C
520C, 720C, 1200C 2.0-2.5 µm 1000-2000°F 550-1100°C
510LT, 710LT, 1100LT 1.5-1.65 µm 500-900°F 260-475°C
510A, 710A, 1100A 1.5-1.65 µm 700-1200°F 375-650°C
510B, 710B, 1100B 0.8-1.0 µm 900-1500°F 475-800°C
510C, 710C, 1100C 0.8-1.0 µm 1200-2000°F 650-1100°C
510D, 710D, 1100D 0.8-1.0 µm 1500-2500°F 800-1375°C
510E, 710E, 1100E 0.8-1.0 µm 1800-3000°F 975-1650°C
510F, 710F, 1100F 0.8-1.0 µm 2000-3500°F 1100-1925°C
510G, 710G, 1100G 0.8-1.0 µm 2500-4500°F 1375-2500°C

Sensors for Viewing through Flames – Measures inside furnaces and combustion chambers where flames are present, like kilns and reheat furnaces
540LT, 740LT, 1400LT 3.7-3.9 µm 400-1400°F 200-750°C
540A, 740A, 1400A 3.7-3.9 µm 600-1800°F 300-975°C
540B, 740B, 1400B 3.7-3.9 µm 800-2200°F 425-1200°C
540C, 740C, 1400C 3.7-3.9 µm 1200-3200°F 650-1750°C
540D, 740D, 1400D 3.7-3.9 µm 2000-4000°F 1100-2200°C

Sensors for Measuring Glass – Measures glass surface temperature and inside furnaces where quartz infrared heaters are used
550A, 750A, 1500A 4.9-5.3 µm 200-1000°F 100-550°C
550B, 750B, 1500B 4.9-5.3 µm 500-1500°F 250-800°C
550C, 750C, 1500C 4.9-5.3 µm 500-2500°F 250-1375°C

Sensors for Measuring Plastics – Measures plastic films and coatings
580A, 780A, 1800A 7.6-8.4 µm 85-600°F 30-300°C
580B, 780B, 1800B 7.6-8.4 µm 200-1000°F 100- 550°C
580C, 780C, 1800C 7.6-8.4 µm 500-1500°F 250-800°C
580D, 780D, 1800D 7.6-8.4 µm 500-2500°F 250-1375°C
(1) All Models are available with D/7, D/15, and D/20 optics.

Options and Accessories:
  • 20 – Remote Display with power supply
  • 22 – Remote Display with 2 relays and a power supply
  • PS – Universal Power Supply
  • AP - Air Purge
  • WCAP - Water Cooling Air Purge
Resources:

Two Wire Temperature Transmitters Brochure (PDF)

Application Worksheet (PDF)
FiberView 1100 Sensors


The FiberView 1100 Single-Wavelength Sensors with Fiber Optics can be used to measure most common materials in medium and high temperature 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
  • Two-Wire 4-20mA output
  • Compact design with a rugged NEMA 4 / IP65 enclosure
  • 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.

FIBERVIEW 1100 SERIES – Two Wire Single Wavelength Sensors
Model Operating Wavelength Temperature Range Optical Resolution Type of Cable Max Length
Fahrenheit Celsius No Lens Std Res Hi Res (1)
Sensors for Medium & High Temperature Applications – steel mills, foundries, heat treating, forging, and semi-conductor processing
1100LT 1.5-1.65 µm 600-1100°F 325-575°C D/2, D/12, D/50 Quartz 6ft / 1.8cm
1100A 1.5-1.65 µm 700-1200°F 375-650°C D/2, D/16, D/75 Quartz 10ft / 3m
1100B 0.8-1.0 µm 900-1500°F 475-800°C D/2, D/12, D/50 Glass 3ft / 91cm
1100C 0.8-1.0 µm 1200-2000°F 650-1100°C D/2, D/16, D/75 Glass 10ft / 3m
1100D 0.8-1.0 µm 1500-2500°F 800-1375°C D/2, D/16, D/75 Glass 20ft / 6m
1100E 0.8-1.0 µm 1800-3000°F 975-1650°C D/2, D/16, D/75 Glass 30ft / 9.1m
1100F 0.8-1.0 µm 2000-3500°F 1100-1925°C D/2, D/16, D/75 Glass 30ft / 9.1m
1100G 0.8-1.0 µm 2500-4500°F 1375-2500°C D/2, D/16, 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:
  • 20 – Remote Display with power supply
  • 22 – Remote Display with 2 relays and a power supply
  • PS – Universal Power Supply
  • 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:

Two Wire Temperature Transmitters Brochure (PDF)

Application Worksheet (PDF)