thermocouple probe|thermocouple probe types|thermocouple types for hot runner

Date:2012-01-13

thermocouple probe|thermocouple probe types|thermocouple types for hot runner

what is thermocouple probe?
hot runner thermocouple probe types A thermocouple is a sensor that used for meansuring the temperature of a product.it is a device consisting of two different conductors that producea voltage to a temperature difference between both ends of the pair of conductors. Thermocouples are widely used in science and industry; applications nclude temperature measurement for kilns, gas turbine exhaust, diesel engines, and other industrial processes.
how many different thermocouple probe types?
There are many different thermocouple probe types but mostly common used are J、K and E types,and like other thermocouples such as R S C and GB,there are used for really high temperature calibrations,Each thermocouple probe type can control different temperature range and environment,and for hot runner system.the most commonly used thermocouple probe types are J and K types,that is,a very thin thermocouple may no treach the full temperature range.
How do i choose a right thermocouple types for hot runner?
It can be many reasons,like countries、companies.and it has to be matched with the hot runner temperature controller box wire connection.
defferent thermocouple probe types should have different wire connections ,and because a thermocouple probe measures in wide temperature ranges and can be relatively rugged.when we are choosing the right thermocouple types for hot runner,we need to take the following aspects into consideration:
temperature range chemical resistance of the thermocouple or its material. vibration and abrasion resistance. installation requirements here we put the perameters of J and K type thermocouple types for hot runner

common thermocouple temperature ranges
types	temp range	std.limits of error	spec.limits of error
J	0℃to 750℃ (32°F to 1382 °F)	greater of2.2℃ or 0.75%	greater of1.1℃ or 0.4%
K	.-200℃to 1250℃ (-328F to 2282 °F)	greater of2.2℃ or 0.75%	greater of1.1℃ or 0.4%
E	.-200℃to 900℃ (-328°F to 1652 °F)	greater of1.7℃ or 0.5%	greater of1.0℃ or 0.4%
T	.-250℃to 350℃ (-328°F to 662 °F)	greater of1.0℃ or 0.75%	greater of0.5℃ or 0.4%