FOT Embeddable Temperature Sensor
FOT-N temperature transducer combines all the desired characteristics expected from the ideal sensor. The compact size, immunity to EMI/RFI/lightning, resistance to corrosive environments, high accuracy and reliability makes it the best choice for temperature measurements in harsh environments.
- Range
- −40 to +85°C (cable dependent)
- Accuracy/Repeatability
- ±1°C
- Resolution
- 0.1°C
Overview
In detail
Measurement principle
Roctest's fiber optic temperature gauges are based on the thermal expansion of highly stable glass, allowing precise, stable, and repeatable measurements. The transducers are intrinsically safe and offer intrinsic immunity to EMI/RFI.
Construction and models
FOT is mainly used for embedment in concrete or in open air. It is fitted with the extrinsic Fabry-Perot fiber optic transducers enclosed inside a protective PVC or stainless steel tube. The FOT-N transducer uses a 1.27 mm O.D. stainless steel tube, 25 mm long; the FOT-T (PVC housing) and FOT-T-SS (stainless steel housing) transducers are 16 mm O.D. and 50 mm long.
Readout and datalogging
The readout units and dataloggers are designed for civil engineering, R&D, industrial applications and have a built-in datalogging capability for up to 50 000 measuring points.
Applications
Buildings; tunnel linings; dams and bridges; nuclear power plants; microwaves and RF; in-situ process monitoring; harsh and hazardous environments; and high temperature/voltage/pressure environments.
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Specifications
Technical specifications
- Range
- −40 to +85°C (cable dependent)
- Accuracy/Repeatability
- ±1°C
- Resolution
- 0.1°C
- Response time (FOT-N)
- Less than 1.5 seconds (tube dependent)
- EMI/RFI susceptibility
- Intrinsic immunity
- Fiber optic cable
- CFO-3STD (3 mm diameter); other fiber optic cables available upon request
- Protection tube (FOT-N)
- Stainless steel
- Protection tube (FOT-T / FOT-T-SS)
- PVC (Model FOT-T), stainless steel (Model FOT-T-SS)
- Diameter
- 1.27 mm O.D. (FOT-N), 16 mm O.D. (FOT-T / FOT-T-SS)
- Length
- 25 mm (FOT-N), 50 mm (FOT-T / FOT-T-SS)
Related
Often specified alongside
Geosystems
TH Series Temperature Sensor
- Range (TH-T)
- -50 to +150 °C
- Accuracy (TH-T)
- ± 0.5% F.S.
- Sensor element (TH-T)
- 3 kΩ chip thermistor
Greenspan
Smart PT Pressure Temperature Sensor
- Range
- 0.2 to 10 bar (vented models); 1.4 to 4 bar (absolute models)
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