26G Radar Level Meter

Product description

MRD9002 series 26G high frequency radar level meter, the measurement distance can reach 80 meters. The antenna is further optimized, and the new fast microprocessor can perform higher-speed signal analysis and processing, so that the instrument can be used for the measurement of various strong corrosive liquids.

Product principle

The radar level antenna emits narrow microwave pulses, which are transmitted downward through the antenna. After the microwave touches the surface of the measured medium, it is reflected and received by the antenna system again, and the signal is transmitted to the electronic circuit part and automatically converted into a level signal (because the microwave propagation speed is extremely fast, the electromagnetic wave reaches the target and is reflected to the receiver. The time taken is almost instantaneous).

A: Range setting, B: Low position adjustment, C: High position adjustment, D: Blind zone range

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

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

Features

The antenna is small, easy to install; non-contact radar, no wear, and no pollution.

Almost unaffected by corrosion, foam; almost unaffected by atmospheric water vapor, temperature, and pressure changes.

Severe dust environment has little effect on the work of high frequency level gauge.

Shorter wavelengths, better reflection on inclined solid surfaces.

The beam angle is small and the energy is concentrated, which enhances the echo capability and helps to avoid interference.

The measurement blind area is smaller, and good results are also obtained for the measurement of small tanks.

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

At high frequencies, it is a better choice for measuring solids and low dielectric constant media.

Product Specifications

Application: temperature-resistant, pressure-resistant, slightly corrosive liquids

Measuring range: 30 meters

Process connection: thread, flange

Process temperature: -40 to 130°C (standard type) / -40 to 250°C (high temperature type)

Process pressure: -0.1～4.0MPa

Accuracy: ±3mm

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 Chamber / Aluminum Double Chamber / Plastic / Stainless Steel Single Chamber

Signal output: 4...20mA/HART (two-wire/four-wire) / RS485 Modbus

Dimension


Technical parameter

Process connection	Thread G1½” A / Thread 1½” NPT / Flange
Antenna material	stainless steel / PTFE
Shell	Seal between housing and housing cover	Silicone Rubber
	Shell window	Polycarbonate
	Ground terminal	Stainless steel
Supply voltage	two-wire	Standard	(16～26) V DC
		Intrinsically Safe	(21. 6～26. 4) V DC
		Power consumption	max 22. 5mA / 1W
		Ripple allowed
	Flameproof	- <100Hz	Uss < lV
		- (100～100K) Hz	Uss < l0mV
		(22. 8～26. 4) V DC	two-wire
		(198～242) V AC	four-wire  /  110V AC   four-wire
Cable	Cable entry/plug	1 M20x1.5 cable entry
		1 blind plug M20x1.5
	Terminals	Conductor cross section 2.5mm²
Output parameters	Output signal	(4～2 0) mA
	Protocol	HART
	Resolution	1. 6μA
	Fault signal	Current output remains unchanged
		20. 5mA
		22mA；
		3.9mA
	Integration time	(0～36)s，adjustable
Blind spot	Antenna end
Maximum measuring distance	MRD9001	10米   （liquid）
	MRD9002	30米   （liquid）
	MRD9002T	20米   （liquid）
	MRD9003	70米  （solid）
	MRD9004	80米  （solid）
	MRD9005	30米  （solid）
	MRD9006	20米  （liquid）
Microwave frequency	26GHz
Communication Interface	HART Protocol
Measurement interval	About 1 second (depending on parameter settings)
Adjust time	About 1 second (depending on parameter settings)
Display resolution	1mm
Operating Storage and Shipping Temperatures	(-40～100) ℃
Process temperature (temperature of the antenna section)	MRD9001	(-40～130)℃
	MRD9002	(-40～250)℃
	MRD9002T	(-40～250)℃
	MRD9003	(-40～250)℃
	MRD9004	(-40～250)℃
	MRD9005	(-40～250)℃
	MRD9006	(-40～200)℃
Relative humidity	˂ 95%
Pressure	Max. 4MPa
Vibration	Mechanical vibration 10m/s² , (10～150)Hz

Installation requirements

Mount at 1/4 or 1/6 of the diameter.

Note: The minimum distance from the tank wall should be 200mm.

Note: ① Datum plane; ② Container center or symmetry axis



The top of the conical tank is flat and can be installed in the middle of the top of the tank to ensure that the measurement to the bottom of the cone is guaranteed.



When there is a material pile, the antenna should be vertically aligned with the material surface. If the material surface is not flat and the pile angle is large, a universal flange must be used to adjust the angle of the horn so that the horn can be aligned with the material surface as much as possible. (Due to the problem of echo attenuation and even loss of signal due to the inclined solid surface)

Multisensing.co's products: radar level gauge, guided wave radar level gauge, high frequency radar level gauge, explosion-proof radar level gauge, FM radar level gauge, pulse radar level gauge, radar level gauge, guided wave radar level gauge Meters and other instruments.