kaidi KD-905 Model 26G Radar Level Meter

PRODUCT OVERVIEW

KD-90X series sensors are 26G high frequency radar type level measuring instruments with measuring distance up to 80 meters. The antenna is further optimized and the new fast microprocessor allows for higher speed signal analysis and processing, making the instrument available for measurement of a variety of highly corrosive liquids.

THE PRODUCT PRINCIPLE

The radar level antenna emits narrow microwave pulses, which are transmitted downward by the antenna. Microwave contact with the measured medium surface is reflected back again by the antenna system, the signal will be transmitted to the electronic circuit part automatically converted into a level signal (because the microwave propagation speed is very fast, electromagnetic waves to reach the target and return to the receiver by the reflection of the time used in this round trip is almost instantaneous).

                                                                                                              A: range setting, B: low level adjustment, C: high level adjustment, D: blind range

The reference surface for measurement is: the bottom surface of the thread or the sealing surface of the flange.

Note: When using the radar level meter, make sure that the highest material level cannot enter the measurement blind zone (the area shown in D in the figure).

PRODUCT FEATURES

● Small antenna size for easy installation; non-contact radar, no wear and tear, no contamination.

● Virtually unaffected by corrosion, foam; virtually unaffected by water vapor, temperature 

and pressure changes in the atmosphere.

● Severe dusty environment has little effect on the work of high frequency level meter.

● Shorter wavelength, better reflection on inclined solid surfaces.

● Smaller beam angle and concentrated energy, which enhances the return capability 

and helps to avoid interfering objects at the same time.

● Smaller measurement blind spot, and good results for small tank measurements.

● High signal-to-noise ratio for better performance even under fluctuating conditions.

● High frequency, a better choice for measuring solids and low dielectric constant media.

PRODUCT SPECIFICATION

Application: Solid particles, powders

Measuring range: Liquid 30m/ Solid block 20m/ Solid powder 15m

Process connection: thread, flange

Process temperature：-40～130℃( standard type ) / -40～250℃( high temperature type )

Process pressure: -0.1～4.0 MPa (flat flange ) -0.1～0.3 MPa (universal flange)

Accuracy: ±15mm

Protection class: IP67

Frequency range: 26GHz

Power supply: two-wire system (DC24V)/four-wire system (DC24V/AC220V )

Explosion-proof grade: Exia ⅡC T6 Ga / Exd IIC T6 Gb

Housing: Aluminum single cavity / Aluminum double cavity / Plastic / Stainless steel single cavity

Signal output: 4.... .20mA/HART ( two wire / four wire ) / RS485 Mod bus

APPEARANCE OF SIZE

TECHNICAL PARAMETERS

Process connection : Thread G1½"A / Thread 1½"NPT / Flange

Antenna profile: stainless steel / PTFE

Housing: Seal between housing and housing cover Silicone rubber

Housing window: PolycarbonateGrounding terminal: Stainless steel

Supply voltage: 2-wire Standard (16 to 26) V DCIntrinsically safe (21. 6 to 26. 4) V DCPower consumption max 22. 5mA / 1WAllowable ripple

Explosion-proof type - <100Hz Uss < lV- (100 to 100K) Hz Uss < l0mV(22. 8 to 26. 4) V DC Two-wire system(198 to 242) V AC four-wire / 110V AC four-wire

Cable parameters: Cable inlet/plug 1 M20xl.5 cable inlet1 blind plug M20xl.5

Wiring terminals: Wire cross section 2.5 mm²

Output parameters: Output signal (4 to 2 0) mACommunication protocol HARTResolution 1. 6 μA

Fault signal Current output constant20. 5mA22mA;3.9mA

Integration time: (0~36)s, adjustableBlind area End of antenna

Maximum measuring distance: KD-901 10m (liquid type)KD-902 30m (liquid type)

KD-902T 20m (liquid type)KD-903 70m (solid type)

KD-904 80m（solid type）KD-905 30m（solid type）

KD-906 20m (Liquid type)Microwave frequency ：26GHz

Communication interface: HART communication protocol

Measurement interval: approx. 1 second (depending on parameter settings)

Adjustment time: approx. 1 second (depending on parameter setting)

Display resolution: 1mm

Operating storage and transport temperature ： (-40～100) ℃

Process temperature (temperature of the antenna section): KD-901 (-40 to 130) °C KD-902 (-40～250)℃

KD-902T (-40～250)℃KD-903 (-40～250)℃

KD-904 (-40～250)℃KD-905 (-40～250)℃

KD-906 (-40～200)℃Relative humidity： ˂95%

Pressure : Max. 4MPa

Shock resistance: Mechanical vibration l0m/s² , (10～150)Hz

INSTALLATION REQUIREMENTS