FOTEMP Series Signal Conditioners


FOTEMP System Principle of Operation

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 TS temperature probe best suited for your application:

>> TS Temperature Probe Quick Guide

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

>> FOTEMP Signal Conditioner Quick Guide

  • FOTEMP-PLUS, MOST POPULAR MODEL SERIES, Compact bench top model for the enduser, lab and OEM applications, 1/2/4 channels
  • FOTEMP-T2, DIN Rail or Chassis Mount model series for multichannel monitoring of industrial process, R&D, and test lab applications, 4/8/12/16 channels
  • FOTEMP Modular, Modular rack mount system for monitoring 1-255 channels
  • FOTEMP-OEM, OEM module, 1/2/4 channels
  • FOTEMP-OEM-MNT, OEM PCB module, 1 channel
  • FOTEMP-MINI, OEM Mini PCB module, 1 channel
  • Specify Calibration Option that meets your measurement range requirements:
  • Basic A Calibration Option: -40°C to +200°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 free copy of FOTEMP-ASSISTANT graphical display and data logging software

Most popular models usually available in stock for PURCHASE:

  • FOTEMP1-OEM-MNT-M, 1-Channel OEM PCB Controller, USB, RS232, SPI, 4-20mA Analog Output, B Calibration (-40C to +300C)
  • FOTEMP1-MINI-A, 1-Channel Mini Signal Conditioner, 3.3V-TTL Serial Interface, A Calibration (-40C to +200C)
  • MOST POPULAR! FOTEMP4-PLUS-P0-V-B, 4-Channel Bench Top model, USB, RS232, 0-10V Analog Outputs, B High Temperature Calibration (-40C to +300C)
  • FOTEMP4-PLUS-P0-V-C, 4-Channel Bench Top model, USB, RS232, 0-10V Analog Outputs, C Extended Temperature Calibration (-200C to +300C)
  • FOTEMP-T2-8-P0-A, 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-OEM-P0-V-A, 1-Channel OEM Module, USB/RS232/0-10V Analog Output
  • FOTEMP4-PLUS-P0-V-B, 4-Channel Bench Top, USB/RS232/0-10V Analog Output
  • FOTEMP-T2-8-B, 8-Channel DIN Rail Mount Module, USB and RS485/ModbusRTU
  • Purchase Option: 50% of paid rental costs can be applied towards purchase of rental unit or another model