NDR20 Series Guided Wave Radar Level Transmitter

Overview

The high-frequency microwave pulses emitted by the guided wave radar propagate along the detection component (steel or steel rod). When they encounter the medium to be measured, due to the sudden change in dielectric constant, reflection occurs and part of the pulse energy is reflected back. The time interval between the transmitted pulse and the reflected pulse is proportional to the distance of the medium to be measured.

Product Features

Due to the adoption of advanced microprocessors and the unique choDiscovery echo processingtechnology, the guided wave radar level gauge can be applied in various complex working conditions.

The various process connection methods and types of detection components make the NR D20 seriesguided wave radar level gauge suitable for a wide range of complex working conditions and applicationscenarios, such as high temperature, high pressure, and media with low dielectric constants.

The guided wave radar level gauge operates in a pulsed mode, with extremely low transmissionpower. It can be installed in various metal and non-metal containers and poses no harm to human beingsor the environment.

Measurement principle

Guided wave radar is a measuring instrument based on the time travel principle. Radarwaves travel at the speed of light, and the travel time can be converted into a level signal byelectronic components. The probe emits high-frequency pulses that propagate along the cable orrod probe. When the pulse encounters the material surface, it is reflected back and received bythe receiver inside the instrument, which then converts the distance signal into a level signal.

The reflected pulse signal is conducted along the cable or rod probe to theelectronic circuitry of the instrument. The microprocessor processes this signal andidentifies the echo generated by the microwave pulse on the material surface. Thecorrect echo signal identification is accomplished by the pulse software. Thedistance D from the material surface is proportional to the time travel T of thepulse:

D=CxT/2

Where in C represents the speed of light.

Since the distance E of the empty tank is known, the level of the material is:

L=E-D

By inputting the empty tank height E(= zero point), the full tank height F (= full scale) and Some application parameters are set to automatically adapt the instrument to the measurement environment.

The X signal should be output within the range of 4-20mA.

Product Categorie

NRD2031 (Single-pole, single-cable) guided wave radar level gauge

Applicable media: liquid, solid powder

NRD2032(Anti-corrosion Type Single/Single Cable Guided  Wave Radar Level Transmitter)

Applicable medium: Liquid, especially highly corrosive liquid.

NRD2033 (Dual) Guided Wave Radar Level Transmitter

Applicable medium: Solid powder materials

NRD2034(Coaxial Tube Type) Guided Wave Radar Level Transmitter

Applicable medium: Liquid, especially liquid with low dielectric constant.

NRD2035 Guided Wave Radar Level Transmitter

Applicable medium: Liquid, especially liquid in high-temperature and high-pressure environments.