HR7301/02 Radar Water/Mud Level Guage

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Ⅰ. General Introduction

HR7301/2 radar level transmitters emit narrow microwave pulses from their antennas. These pulses propagate at the speed of light in space and when they encounter the surface of the measured medium, a portion of their energy is reflected back and received by the same antenna. The time interval between the transmitted and received pulses is directly proportional to the distance between the antenna and the surface of the measured medium.

Due to the extremely high speed of electromagnetic wave propagation, it is challenging to accurately determine the time interval between the transmitted and received pulses, which is on the order of nanoseconds. The HR7301/2 radar level transmitters employ a special demodulation technique that allows for precise identification of the time interval between the transmitted and received pulses, enabling accurate calculation of the distance from the antenna to the surface of the measured medium.

Ⅱ.Product Features

þThe narrow beam angle of the radar level transmitter allows for concentrated energy, providing strong resistance to interference and greatly improving measurement accuracy and reliability.

þThe small antenna size facilitates installation and the addition of protective devices such as dust covers.

þWith a lightweight design of approximately 1kg, it is easy to install.

þThe measurement range can reach up to 70 meters, making it suitable for large-scale water level measurements in reservoirs and other applications.

þIt offers multiple output circuit interfaces that can be integrated with data acquisition systems.

þUsing a pulse operating mode, the radar level transmitter emits extremely low power, posing no harm to humans or the environment.

 

. Technical parameters

Main Specifications

Blind Area

End of the Antenna


Max. Measuring Dicetance

HR7301

30m

HR7302

70m

Microwave Frequency

26 GHz


Communication Inferface

ModBUS


Measuring interval

≈ 1s


Adjusting Time

≈ 1s


Display Resolution



Working/Storage/Transpotation Temp.

(-40~100 )℃


Process Temp.(Antenna)

(-40~250 )℃


Pressure

Max. 4MPa


Shock-proof

Mechanical vibration of 10m/s⋙


Power Supply
4-Wire

Standard

(6~26)VDC


Consumption

max 12mA


Allowed Wave

 -<100Hz

Uss<1V

 -<(100-100k)Hz

Uss<10mV

Output Parameters

Output Signal

RS485


Communication Protocol

Modbus


Resolution

1.6 u AC


Breakdown Signal

Current output remain unchanged


20.5 mA


22 mA


3.9 mA


Integral time

(0-50)s, adjustable


Housing

Sealing between outer cover and shell

Silicon rubber


Shell Window

Polycarbonate


Ground Terminal

Stainless Steel


Cable Parameters

Cable entry/plug

M20*1.5 Cable entry


Connecting Terminal

Wire Cross-section 1.0 m


 

. Dimensional structure(Unit:mm)

HR7301

radar mud water level meter 26G.jpg 

Flange

Bell Mouth Diameter

Bell Mouth Height

DN50

φ46

140

DN80

φ76

227

DN100

φ96

288

 

HR7302

radar mud water level meter 26G.jpg.jpg 

Flange

Bell Mouth Diameter

Bell Mouth Height

DN80

φ76

227

DN100

φ96

288

dn125

φ121

620

Options for Flange

Size

Diamiter-D

Center hole spacing-K

Number of holes-N

Aperture

DN50

φ165

φ125

4

18

DN80

φ200

φ160

8

18

DN100

φ220

φ180

8

18

DN125

φ250

φ210

8

18

DN150

φ285

φ240

8

22

DN200

φ340

φ295

12

22

DN250

φ405

φ355

12

26

 Option Guide:

Option Guide, Besteetech Radar level meter.png

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