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KD-FMF series sensors are 120G FM radar type level measuring instruments with a measuring distance of up to 150 meters. The antenna is further optimized for processing and the new fast microprocessor allows for higher speed signal analysis and processing, making the instrument available for measurement of high temperature and high pressure and other environmental solids.
The general principle of frequency modulated continuous wave radar level meter is that the radar emits electromagnetic waves at the top of the tank, and the electromagnetic waves are received by the radar after hitting the medium and reflected. Because the speed of light C and FM slope K are known, so the frequency difference δ f is estimated, and the distance R of the material surface at the radar installation position can be obtained, and then the height of the material level is obtained by subtracting the spatial distance from the radar to the material surface (referred to as the empty height) from the known total height of the tank.
This meter fully meets the requirements of protection class IP66/67, please ensure the waterproofness of the cable sealing head. As shown
How to ensure that the installation meets the requirements of IP67:
Make sure that the sealing head is not damaged.
Make sure that the cable is not damaged.
Make sure that the cables used meet the requirements of the electrical connection specifications.
Before entering the electrical interface, bend the cable downward to ensure that water does not flow into the housing, see ①
Please tighten the cable sealing head, see ②
Please block the unused electrical interfaces with blind plugs, see ③
Measuring medium: solid
Measuring range: 0.3m~150m
Process connection: flange ≥ DN80
Process temperature: -40～110℃
Process pressure: -0.1～0.3MPa
Protection level: IP67
Frequency range: 123GHz
Power supply: two-wire (DC24V) / four-wire (DC12V~24V) / four-wire (AC220V)
Explosion-proof grade: Exia ⅡC T6 Ga / Exd IIC T6 Gb
Housing: Aluminum / Plastic / Stainless steel
Signal output: 2-wire 4.... .20mA / HART protocol / 4-wire 4.... .20mA /RS485 Modbus
Process Link Flange
Material 304 stainless steel, PP
Housing Seal between housing and housing Silicone rubber
Housing window Polycarbonate
Grounding terminal Stainless steel
Supply voltage Four-wire system Standard type (12~24)V DC
Power consumption max80mA DC24V/2W
Allowable ripple ＜100Hz Uss＜1V
Double cavity housing (198~242)V AC 4-wire system
100V AC four-wire system
Cable parameters Cable inlet/plug 1 M20x1.5 cable inlet
1 blind plug M20×15
Grounding terminal Wire cross-section 2.5mm2
Output parameters Output signal (4~20)mA/RS485Modbus
Fault signal Current output constant; 20.5mA;22mA;3.9mA
Integration time (0~20)s, adjustable
Blind area 0.1m/0.2m/0.3m
Max. measuring interval 150m
Measuring interval approx. 1 sec (depending on parameter setting)
Adjustment time approx. 1 sec (depending on parameter setting)
Adjustment time Working storage and transportation temperature
Mechanical vibration 10m/s2,(10~150)Hz
When installing the instrument, avoid installing it above the inlet, and try to avoid various objects that affect the signal, such as stirring paddles, etc.
● Under extremely complex working conditions, the instrument can work normally without any obstacle in the area of 20cm radius centered on the radar installation point.
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