FOTEMP Signal Conditioners


FOTEMP® Series

Fiber optic thermometer systems are also available for rent!

The TS series fiber optic temperature probes are true absolute temperature sensors consisting of a gallium arsenide (GaAs) crystal that is mounted on the end of an optical fiber. The diagram above illustrates how the fiber optic temperature measurement system works. A broadband light source is coupled into the fiber and impinges on the crystal. GaAs behaves like a temperature sensitive cut-off filter in which the crystal absorbs some light and transmits other light. The characteristic edge, or transition wavelength, between the reflected and transmitted spectrum is directly related to the band gap energy, and hence the absolute temperature.

Technical Explanation: The system records the photo energy sufficient to excite an electron from the valence to the conduction band of the semiconductor crystal. The required amount of energy is equal to the so-called band-gap energy, Egap. The well-known underlying principle of operation is based on the temperature dependence of the band gap of the direct (zone center) GaAs intrinsic gap; Egap=1.423eV, corresponding to 872nm at 300°K; dEgap/dT= -0.452meV/°K at 300°K. The spectrum of a GaAs sensor crystal placed in a medium of unknown temperature is measured in the reflectance mode, and the wavelength position of the characteristic edge is analyzed to determine the temperature.

NOTE: FOTEMP® is a registered trademark of Weidmann Holding AG

Micronor offers a complete range of fiber optic temperature sensors, probes and interfaces for temperature measurement in challenging environments. TS series fiber optic temperature probes offer immunity to RF and microwave radiation along with wide temperature range, intrinsic safety and non-invasive use. The fiber optic temperature probes can operate over -200°C to +300°C (-328°F to +572°F), and withstand harsh and corrosive environments. Typical fiber optic temperature monitoring applications include:

  • Process monitoring
  • Power transformers
  • Medical environments
  • Catheter instrumentation
  • Harsh chemical conditions, including radiation environments

Select the FOTEMP signal conditioner model best suited for your application:

>> FOTEMP Signal Conditioner Quick Guide

  • FOTEMP1-H, Single channel portable handheld with internal rechargeable battery
  • FOTEMP4-PLUS, NEW Compact bench top model for the end user and oem, 1 or 2 or 4 channels
  • FOTEMP-T2, NEW DIN Rail or Chassis Mount model with Display for for multichannel, industrial process and R&D applications, 4 or 8 channels
  • FOTEMP Modular, Modular rack mount system for monitoring 1-255 channels
  • FOTEMP-OEM, OEM module, 1 or 2 or 4 channels
  • FOTEMP-OEM-MNT, OEM PCB module, 1 channel
  • Specify Calibration Option that meets your measurement range requirements:
  • Basic A Calibration Option: -40°C to +300°C
  • High Temperature B Calibration Option: -40°C to +300°C
  • Extended Temperature C Calibration Option: -200°C to +300°C
  • All FOTEMP/INSULOGIX models include copy of FOTEMP-ASSISTANT graphical display and data logging software

Most popular models usually available in stock or fast delivery for purchase:

  • FOTEMP1-OEM-MNT-M, 1-Channel OEM PCB Controller, USB, RS232, SPI, 4-20mA Analog Output, B Calibration (-40C to +300C)
  • FOTEMP1-H-A, 1-Channel Handheld, RS232, USB Dongle (available as an option), A Calibration (-40C to +200C)
  • FOTEMP4-PLUS-P0-V-B, NEW 4-Channel Bench Top model, USB, RS232, 0-10V Analog Outputs, B Calibration (-40C to +300C)
  • FOTEMP-T2-8-P0-A, NEW 8-Channel DIN rail mount module with Display, USB, RS485/ModbusRTU, 8x 4-20mA Analog Outputs, 4x Programmable Control Relays, A Calibration (-40C to +200C)

Models available for rent (subject to availability):

  • FOTEMP1-H-A, 1-Channel Handheld, RS232, USB Adapter available upon request
  • FOTEMP4-PLUS-P0-V-B, 4-Channel Bench Top, USB and RS232
  • FOTEMP8-TRAFO, 8-Channel DIN Rail Mount Module, USB and RS232
  • Purchase Option: 50% of paid rental costs can be applied towards purchasing rental unit or another model