전체 상품

These Platinum / Palladium Thermocouples (Pt/Pd) are manufactured by the National Physical Laboratory (NPL) who have developed a novel physical mechanism which mitigates the mechanical stresses caused by the different thermal expansion of Pt and Pd wires. This dispenses with the fragile coil conventionally used with this type of thermocouple.

The ITS-90 specifies the SPRT to the freezing point of silver, 961.78°C. Thermocouples can be used beyond this temperature but it is difficult to see small changes in temperature. For a Type R thermocouple the voltage sensitivity at the copper point is 14μV/°C; a change of 1 μV is equivalent to a voltage change of 71mK. When using thermocouples electrical noise limits the ability to follow small changes in the copper freezing plateau and so attention was turned to the development of a new resistance thermometer allowing better measurements to be made.

Isotech has produced over 200 high temperature thermometers which have been sold world-wide for use up to the silver point. As a consequence of our predelivery testing alone we have probably made more silver point calibrations than anyone else in the world.

The Annealing Furnace, model 414, is designed to heat, anneal and cool Standard Platinum Resistance Thermometers (SPRTs) prior to calibration. The temperature range of the Furnace, from ambient to 1000°C, enables all types of SPRTs to be annealed.

Whilst heat pipe furnaces offer the ideal environment to melt and freeze ITS-90 Fixed Points the temperature range is limited by fluid that flows inside the pipe. Three zone furnaces can offer wider operating ranges and still meet the requirements for “Optimal Realization of the Defining Points of the ITS-90…” CCT/2000-13. In place of a heat pipe the 17703 Medium Temperature furnace uses top and bottom guard heaters to minimise temperature gradients.

ISOTECH LOW TEMPERATURE FURNACE

ISOTECH DUAL AND HEAT PIPE FURNACES

ITS-90 Fixed Point Cells Optimal

P3800 시리즈 유압 분동식 테스트기 는 140 MPa(20,000 psi) 및 최대 400 MPa 보다 큰 압력을 요구하는 응용 분야에 사용합니다. P3830 , P3840 또는 P3860 필요한 높은 압력을 생성하도록 내장 증강 장치를 사용합니다.

The Isotech Argon Triple Point Apparatus is a robust, simple to use and affordable solution for the realisation of the argon triple point.

ISOTECH Mercury Triple Point Apparatus

스테인리스 재질로 봉합되어 단단한 구조의 수은 삼중점셀은 쉽고 안전하게 수은 삼중점(-39.8344℃)을 실현하였습니다.