NYRD705 1.8GHz Guided Wave Radar Level Meter

The guided wave radar level meter is a level meter based on the principle of time domain reflection (TDR). The electromagnetic pulse of the radar level gauge propagates along the steel cable or probe at the speed of light. Part of the pulse of the level meter is reflected to form an echo and return to the pulse transmitter along the same path. The distance between the transmitter and the surface of the measured medium is proportional to the propagation time of the pulse during that period, and the liquid level height is calculated.

Radar Level Meter Technical Parameter

※ Note: Products can be customized according to the specific requirements of users!

Radar Level Meter Operating Principle

Guided Wave Radar is the kind of measuring instrument that is based on the principle of time travel. The radar wave travels at the speed of light, and its running time can be converted into a level signal by the electronic components. The probe emits high-frequency pulses which spread along the cable, and the pulses are reflected back when they encounter the material surface and received by the receiver inside the meter. The distance signal is then converted to the level signal.

Input

The reflected pulse signal is conducted along the cable back to the electronic circuit of the meter, and the microprocessor processes this signal to identify the echo produced by the microwave pulses at the material surface. The recognition of the correct echo signal is done by the intelligent software. The distance D to the material surface is proportional to the time travel T of the pulse:

D=C×T/2

where C is the speed of light

As the distance E of the empty tank is known, the level L is:

L=E-D

Output

Set accordingly to the empty tank height E (= the zero point), the full tank height F (= the full scale) and some application parameters. The application parameters will automatically make the instrument adapt to the measurement environment, corresponding to the output of 4 ~ 20mA.

Radar Level Meter Electricalconnections

◎ Supply voltage

(4 ~20)mA/HART(Two-wire)
The power supply and the output current signal share a two-core shielded cable. Refer to the technical data for the specific supply voltage range. For the intrinsically safe type, a safety barrier must be added between the power supply and the instrument.

(4~20)mA/HART(Four-wire)
The power supply and the current signal are separated, and each uses a two-core shielded wire. Refer to the technical data for the specific supply voltage range.

RS485/Modbus
The power supply and the Modbus signal are separated, and each uses a two-core shielded wire. For specific supply voltage range see technical data .

Company Introduction

 Xi'an Dehou Electronic Technology Co., Ltd. is a high-tech enterprise specializing in research and development, production, sales of industrial automation instruments and providing Internet of Things solutions.

At present, the company has obtained more than 100 patents and more than 20 soft patents. It has passed IS09001 quality management, IS014001 environmental management, IS045001 Occupational Health and safety management, Occupational Health and Safety Management, GBT29490 Intellectual Property Management, military standard, information security and other system certification and EU CE certification, Russian EAC certification, ATEX explosion-proof certification and SIL certification and other qualifications.

The company is committed to the system integration of process measurement, control, management and other aspects of the system and the development, development, production, sales and service of intelligent instruments and instruments of the Internet of Things.At present, it has metering level FM radar level, pulse radar level, radio frequency guide level, liquid level of magnetover, magnetoexpansion level, sound fork density (level), pressure, flow, multi-point thermometer, analysis, system and tank area meter.The products are widely used in petrochemical industry, coal chemical industry, metallurgy, electric power, building materials, food and medicine and environmental protection water treatment and other industries.

The company can provide customers with location, pressure, temperature, flow, measurement requirements of analytical instruments and cooperation of the Internet of T scheme.