General Instruments Platinum High Temp Thermocouples
GIC is the leading Platinum High Temp Thermocouples Manufacturer in India providing reliable solutions for accurate pressure measurement to process industry worldwide.
For high-temperature applications, generally, Ceramic protecting tubes are used in different industries such as Iron & Steel, glass, cement etc. It has high resistance to thermal shocks. It is inert to most chemicals and has a high dielectric strength. These are primarily used to protect noble metal thermocouples (like R, S & B type) They are available in variety of sizes. Normally it is cemented (by high temperature withstanding cement) to metal tubes (which are termed as holding tubes). The process connection slides or is welded to this metallic portion of the tube. For double protection, inner ceramic tube is also used. Mainly two grades of ceramic are used. Ceramic 610 (also termed as Mullite) & Ceramic 710 (recrystallised 0 0 Alumina-99.5% purity) can withstand up to 1500 C & 1800 C respectively. It should be remembered that it has poor mechanical shock resistance. It is impervious to gases at high temperatures
Routine tests:
a) Accuracy/Calibration Test
b) Nitrogen Leakage Test (Weld
Closure Conformity)
c) Insulation Resistance Test
d) Thermal Response Time Test
e) Continuity Test
f) Dimension Checks
Type tests:
a) Vibration test
b) Drop / Shock test
c) Self-heating error test
d) Hysteresis Test
e) Stability Test
f) Autoclave Test
g) Pull Test (Load Withstand Test)
h) Di-electric strength Test (H.V. Test)
