High temperature immersion probes are designed for measuring various high temperature environments. These probe models have protective heat resistant sheath and high temperature measuring sensors.
Note: To go to a definite probe model, move the cursor on the sensor image and click on it.
Attention! All high temperature probes have limited lifetime which depends directly on operating conditions and gas environment where the sensor is used. It’s very necessary to know the gas environment beside the temperature range! Additionally, models 1-23, 1-23n, 1-24, 1-29 and 1-29k don’t keep high temperature along their entire length, so only the high temperature length should be in a hot zone.
Pay attention to materials used for a particular probe model (see Fig.) and their possible operating conditions (see Table). Temperature around a protection head should not exceed 300 °C, near a connector (Models 1-26a, 1-23k) – 200 °C, in a place where the common stainless steel (321SS) passes to the high temperature steel or ceramics – 800 °C. In no case is possible to order a thermocouple with XL sheath material (up to 1200 °C) if the real working temperature of the object doesn’t exceed 980 °C.
Max Temp Range
Gases, air, water, steam, melts, organic products, including food
No acid resistance (probably only use Teflon coating blankets or acid- materials)
The same but pressure and mechanical loads
Air, combustion products
Air and inert gases - without thermal cycles
Forbidden to use in melts, a reducing atmosphere with a high content of ammonia. Do not recommend continuous use in the range 550 to 850 °C.
Air, gases, combustion products, including sulfur
Gas environment with a high contain of carbon dioxide
Oxidizing gas environment, air, inert gases, exhaust fumes - without thermal cycles
Forbidden to use in atmosphere with a high content of sulfur and its combustion products
Carbon dioxide, nitrogen, ammonia
Air, inert gases, most oxidizing and reducing atmospheres
Allowed only short-term use in temperatures below 980 °C, as if the temperature is higher than the protective film is formed by oxidation