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FERRO Process Temperature Control Rings 

测温环温度:温度对照表、温度校正曲线图下载


PTCR-ZTH 560-660℃ 002号温度对照表 


PTCR-UTH 660-900℃ 008号温度对照表



FERRO测温环ZTH UTH ETH 970-1750温度  (最高温度)保温\恒温曲线校正图 



FERRO ZTHRing temperature correction graph fordifferent soaking times 





FERRO ETHRing temperature correction graph fordifferent soaking times


FERRO Ring temperature correction graph fordifferent soaking times(970-1750)




以上注意事项:

为了保证测量温度的准确,每个温度对照表都和该批测温环相对应的。每批出货的环都带相应的曲线校正图和对照表。

对照表不是通用的,使用者注意环上的数字和对照表上一数字一致才可以使用,否则你校正出的温度会有误差。

导致对炉温的错误估计。曲线校正图通用不受批次限制。

PTCR Process Temperature Control Rings 

From 560 °C (1040 °F) up to 1750 °C (3182 °F) 

With this data sheet we provide a general overview about PTCR. For further technical information, useful hints and application advice for the use of Process Temperature Control Rings PTCR please refer to our PTCR Manual “Technique & Application”.



How does a PTCR work? 

The PTCR is a ceramic ring which shrinks if it is exposed to heat. The degree of shrinkage depends on the actual temperature in the kiln/furnace, the ability of the kiln/furnace to transfer the heat and the time it is exposed to the heat treatment. The amount of contraction - the amount by which the ring diameter has shrunk - is measured with a numerical or digital micrometer. For ease and for comparison, the shrinkage of PTCR – and therefore the total absorbed heat quantity – is converted by means of a chart into a single, fictitious conversion parameter the so-called “ring temperature” (RT). Basically, this is not a “temperature”, but a parameter that depends on time and temperature. The RT does not reflect the maximum temperature of the firing process, and does not correspond to the real kiln/furnace temperature, because the PTCR accumulates the absorbed heat quantity over time. The PTCR temperature reading is further influenced by the top temperature hold time (soak time) at maximum temperature. At a constant temperature the PTCR will continue to shrink, leading to a higher RT reading. Selecting the most appropriate ring type depends on the process temperature compared to the temperature range of the ring and the maximum hold time, which is typically between 0.5 and 10 hours. Using the PTCR beyond this maximum hold time may lead to erroneous results, because the PTCR ceases to shrink further on a certain moment.



日本JFCC测温块温度对照表(部分)


L2 600-900℃ 对照表


L1 800-1150℃ 对照表


L 1050-1300℃ 对照表


M 1200-1500℃ 对照表


H 1400℃-1700℃ 对照表


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