Graphite furnace and tungsten furnace special sensor

Production application:

1. Widely applicable to measure temperature under the oxidizing environment, vacuum, reducing atmosphere and inert gas conditions, particularly suitable for measuring the temperature above 1800 ℃ ultra-high temperature environments.

2. It can be used in complex environment or a more hostile environment.

3. It can be used in graphite furnace, molybdenum wire furnace, tungsten furnace, vacuum furnace, a variety of high-temperature furnace.

4. It can be used in vehicle temperature probe, Special Occasion temperature measurement, temperature measurement adverse situations, anti-corrosion, anti-oxidation of long-term temperature measurement.

Production structure:

Graphite furnace and tungsten furnace special sensor made up of ZrB2 composite ceramic temperature sensing element, the transmission element, protection tube, ceramic core tube, filling materials, junction boxes, signal conditioning and conversion circuits, special control instruments, cables and other auxiliary devices.

Production features:

1. The Max. using temperature of traditional tungsten-rhenium thermocouple is 1900℃, applicable to vacuum and inert atmosphere environment, a serious error occurs in the presence of a trace of oxygen.

2. The patented invention of graphite furnace and tungsten furnace special sensor belongs to Liangqiandu company. Under vacuum and inert atmosphere environment, can measure to 2000℃, 2200℃, and this technology fill blank of internation.

3. After corrected graphite furnace and tungsten furnace special sensors, the accuracy similar with standard double platinum and rhodium thermocouple,  in 1700-1800℃ interval temperature repeatability and longevity, similar with double platinum and rhodium thermocouple, the error in range of 1800-2200℃  is less than ± 10℃.

4. Different protection tube design, adapt to different harsh environment to meet the needs of different temperature environments. Special ultra-high temperature thermocouple can be designed according to the needs of users.

5. Different atmosphere can design different thermocouples, using an atmosphere including: vacuum, oxidizing environment, an inert atmosphere, special ambience. Special ultra-high temperature thermocouple can be designed according to the needs of users.

Main specifications:

1. Range of measurement: 50-2000℃, 50-2200℃

2. Response time: ≤150s

3. Sensitivity: 0.0155mΩ/℃(under 1000 ℃, 1200 ℃, 1400 ℃, 1600 ℃ environment, heat for some time, at a certain rate of heating temperature, record the sensor resistance values in different temperature sections, the ratio of the measured sensor at different temperature ranges' change in resistance value and temperature with little change.)

4. Repeatability: ±5℃/2000℃(Continuous measurement with a thermocouple repeatability:using the same rate heating,when the temperature reached the same set temperature, after holding time, two consecutive error is less than ±5℃/2000℃)

5. Accuracy: In a tube furnace, one end set high precision optical pyrometer, the other end into the test sensor, after test for sensor calibration, at 2000 ℃ conditions after a period of incubation, the average error of measured sensor and high precision optical pyrometer is  ≤ ±6 ℃

6. Mode of connection:  four-wire system

7. Sensor character: thermal resistance

 

 

 

Model	Range of temperature (℃)	Long-term using temperature(℃)	Steel protection tube	Heat end protection tube
LQD2000B500/350-22/300C	50-2000	2000	25X150	22x300
LQD2000B500/350-22/300W	50-2000	2000	25X150	22x300
LQD2200B500/350-22/300C	50-2200	2200	25X150	22x300
LQD2000E500/350-22/300W	50-2200	2200	25X150	22x300