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Sensor: Rhodium-Iron Resistance Sensor (range 1.4 - 800K) 3-point calibrated
Sensor: Rhodium-Iron Resistance Sensor (range 1.4 - 800K) 3-point calibrated
Our Price: £796.00

Four wire rhodium-iron resistance temperature sensor.
Sensor: Rhodium-Iron Resistance Sensor (range 1.4 - 800K) fully calibrated 1.4 - 300K
Sensor: Rhodium-Iron Resistance Sensor (range 1.4 - 800K) fully calibrated 1.4 - 300K
Our Price: £1,703.00

Four wire rhodium-iron resistance temperature sensor.
   
 
The Rhodium-Iron 27 Ω sensor is a 4-wire device possessing excellent stability. An excitation current of 1 mA is typical. The resulting change in temperature due to self-heating is less than 1 mK over the range 1.4 to 300 K, provided the sensor is properly installed. Two standard versions of the sensor are available: three-point calibration and full calibration. The full calibration is made between 1.4 and 300 K. When a three-point calibration is used, two of the reference points can be used to adjust the span and zero of a standard curve stored in the temperature controller. A generic calibration curve is available over the full range 1.4 – 800 K. At present calibration data for individual sensors is not available above 300 K.
A full calibration, if purchased, includes:
  • Certificate of calibration. This states that the calibration conforms to the International Temperature Scale (1990), and is traceable to NIST
  • Measured calibration data
  • A fit to the data based on Chebychev polynomials, with deviations
  • An interpolation table All supplied on CD
The table below shows the percentage relative error when rhodium-iron resistance sensors are used in magnetic fields. The use of these sensors at temperatures less than 80 K is not recommended in the presence of magnetic fields.
Rhodium-Iron resistance laboratory standards are also available. Please contact your Oxford Instruments representative for further information.
Magnetic field dependence of rhodium-iron sensors
|∆T|/T (%) in magnetic field B
T
B
2.5 T
8 T
14 T
19 T
4.2 K
11
40 (6 T)
-
-
40 K
1.5
12
30
40
87 K
0.2
1.5
4
6
300 K
0.01
0.1
0.4
-
Ordering information
Sensor Mounting block Temperature controller/monitor
Three-point calibrated sensor T1-102 A6-101 Mercury iTC
Fully calibrated sensor T1-103 A6-101 Mercury iTC