The operation mode of the radar thermocouple is introduced

Thermocouples are pulse wave and frequency modulation continuous wave radar two work modes.

pulse wave ( 脉冲) Method: most of the radar pulse type thermocouple used in microwave frequency is 5. 8 GHZ, radiation Angle is bigger, accuracy is about 0. 2 to 0. 3% f。 年代。 , general intermediate under microwave material level meter in this way.

frequency modulation continuous wave ( FMCW) Method: measuring circuit is complex, high precision can reach 0. 1% f。 年代。 , clutter echo also relatively easy to remove.

the advantages of radar thermocouple include by microwave is electromagnetic wave, traveling at the speed of light and is not affected by medium characteristics, so in some situations, such as temperature, pressure, steam, ultrasonic level meter cannot work normally, and radar thermocouple can use; Most of the material level meter for two-wire system integration products, save a lot of cables; Software debugging is convenient.

radar thermocouple disadvantages include: the price is higher, two wire radar thermocouple requires 24 VDC power supply quality is higher, the ac harmonic average no more than plus or minus 30 vac. Radar thermocouple internal power supply module are susceptible to other large current interference and damage, reason should be the power to dismantle the indicator; Measurement of solid materials, easy to produce interference echo, reduce the measuring result, so does not apply to a measure of the solid materials.