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TS4 – the chemically resistant temperature probe

TS4 Fiber Optic Temperature Probe


Fiber Optic Temperature Sensor

The TS4 fiber optic temperature probe is especially designed for the use in harsh chemical and nuclear environments. Its increased resistance comes with no loss in accuracy and temperature measuring range.

The TS probe consists of a PTFE coated glass fiber and a GaAs crystal mounted on the fiber tip. The sensor is entirely passive and non-metallic. The sensor is especially suitable for high temperature ranges (-200°C to +200°C) as well as aggressive and harsh test environments. The sensor cable can be up to several meters and kilometers long without influencing the accuracy of the measurement result.

Starting at 850nm, GaAs becomes optically translucent for which the position of the band gap is temperature dependent. The FOTEMP signal conditioners contain a light source and a device for the spectral detection of the band gap.


Name of sensor TS4, The resistant temperature probe
Temperature range -200°C to +200°C
Accuracy +/- 0.2°C
Thermal response Up to 7°C/s
Fiber Ø 200/220/240μm
Sensor length

2m standard

Other lengths on customer request, max 20m.

Connector type

ST standard

Other connector types available

Signal conditioner Compatible with all FOTEMP series fiber optic thermometers

Specifications subject to change without notice

Ordering Information

TS4-XX where
XX=Overall Sensor Length in meters, max length 20m
Standard sensors below in stock, customer specials 3-4 Weeks ARO
TS4-02 Standard TS4 Sensor, Length=2m
TS4-06 Standard TS4 Sensor, Length=6m
DIST-CXXX-XX          FO Extension Cables, Standard Lengths=3m, 5m, 10m
Special lengths up to 100m available upon request
FOTEMP4-P0-V-B Standard 4-Channel Bench Top Signal Conditioner, USB/RS232,
0-10V Analog Output, B-Calibration= -40C to +300C,
IN STOCK -Rent or Purchase
FOTEMP4-P0-V-C Standard 4-Channel Bench Top Signal Conditioner, USB/RS232,
0-10V Analog Output, C-Calibration= -200C to +300C (cryogenic to high temperature),
IN STOCK – Purchase Only


  • Temperature Range: -200°C to +200°C
  • High Accuracy: +/- 0.2°C
  • Completely non-conductive
  • Immune to RFI, EMI, NMR and microwave radiation
  • Resistance to extreme temperatures
  • Stable and repeatable measurement
  • GaAs-based temperature sensor
  • Distances up to 2000 meters


  • Harsh chemical conditions
  • Nuclear radiation
  • Offshore temperature measurements
  • Natural gas pipelines and storage tanks
  • Battery testing


Call +1-805-389-6600 or email

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