Frequently Asked Questions
A quick guide to using and working with Carbon Ceramic cryogenic temperature sensors
Q. What is the the repeatability/accuracy measurement or estimate for CCS at 4.2K.?
Repeatability at 4.2 K is better than 0.010 K after 1 year. Accuracy measurement depends on the calibration accuracy and the measurement system accuracy at 10ľA measurement current.
Q. How many calibration points do your sensors come with and how is the data supplied (i.e. polynomial fit etc.)?
For the temperature range 4.2 - 300 K, we normally use 16 - 18 calibration points. The data is supplied in the form of a calibration table and polynomial fit coefficients.
Q. Do you have a recommended mounting method.?
We have recommended mounting methods and can offer advice and support to aid your application of CCS sensors in your systems.
Q. Can the stability and be degraded by bending the leads or could they be damaged by heat when soldering?
Due to their method of construction, CCS sensors are mechanically robust and bending of the leads is fine providing care is taken. You may solder CCS sensor leads using normal soldering techniques (approx. 250-280oC). As with all delicate instrumentation, we do not recommend heating for longer than 1 min during soldering
Q. What materials are the leads made of and are they available in 2, 3 & 4 wire versions?
The leads are made from a non-oxidising alloy and as such they are suitable for use at high temperatures. In standard form the sensors are provided with two leads. However, it is possible to modify the exiting leads to give a 4-wire configuration. We can provide an optional design and development service covering applications advice and prototype mounting technology if required.
Q. Are CCS resistors encapsulated?
The sensors are free to the environment, hermetically sealed and are strictly controlled during manufacture.
Q. Do the resistors undergo any sort of thermal conditioning / ageing?
Calibrated and selected uncalibrated sensors are thermally cycled (50 cycles over 3 months).
Q. Would they be suitable as a gas temperature sensor?
Yes. They can be used to measure temperatures in vacuum and in solids, gas and liquids (at pressures up to 25 bar).
Q. Could you provide a quotation in my local currency?
We can quote in any local currency and all quotations are valid for 60 days from date of issue.
Special prices offered to scientific institutes