MV-RD21S 80 GHz Radar Level Meter for Ambient-Temperature Bulk Solids

selection summary

MV-RD21S is a normal temperature solid level 80 GHz radar level meter. It is mainly used for solid measurement. The reference range is 0.1-30m; 0.3-150m. It is suitable for normal temperature powder silos, granular material and mineral silos, and normal pressure solid storage facilities. When selecting, you should focus on checking the range, temperature and pressure, connections, materials, output and installation conditions.

Product overview

An 80 GHz radar level meter suitable for solid levels at normal temperature and pressure, using a 76mm PE lens antenna, for powder and granule silos.

Measurement principle

MV-RD21S uses 80 GHz frequency modulated continuous wave measurement: the antenna emits a continuous frequency sweep signal and receives the medium surface echo, and the instrument calculates the distance based on the frequency difference between the emission and the echo. The high-frequency narrow beam is beneficial to avoid tank wall components, but it still requires the correct selection of the nozzle location, antenna size and false echo suppression.

Core advantages

76mm PE lens antenna
3° narrow beam, suitable for long-range solid measurement
Normal temperature and pressure configuration, simple structure

Usage scenarios

Room temperature powder silo
Granular materials and mineral silos
Atmospheric solids storage facility

application benefits

Procurement concernThe antenna, process connection, high temperature structure and output options of MV-RD21S will affect the delivery time and price. The inquiry form should state the actual process conditions instead of just the measuring range.

technical valueThe narrow beam helps reduce interference caused by tank walls, ladders and stirrers, making it suitable for small interfaces or complex containers; the correct installation position is still a prerequisite for stable measurement.

Operation and maintenance valueNon-contact measurement reduces wear and contamination of wetted parts, and echoes from empty tanks, high positions and typical process conditions are saved during commissioning to facilitate subsequent diagnosis.

Technical parameters

Measuring medium	solid
Measuring range	0.1-30m；0.3-150m
process connection	Flange≥DN80
process temperature	-40-80℃
process pressure	-0.1-0.3MPa
antenna	76mm PE lens antenna
Measurement accuracy	±5mm
launch angle	3°
Protection level	IP67
center frequency	80 GHz
Power supply and output	Two-wire system DC24V / 4-20mA / HART; optional four-wire system AC220V, RS485/Modbus, dual relay, FF, PROFIBUS-PA/DP
Explosion-proof certification (optional)	Ex ia IIC T6 Ga / Ex db IIC T6 Gb
Parameter setting method	Display programming/Bluetooth/HART protocol/Tank side display
Electrical interface	M20×1.5 / 1/2 NPT
Seal selection	FKM / EPDM / FFKM, etc., confirm according to medium and temperature
Housing options	Aluminum alloy single cavity/double cavity, stainless steel single cavity/double cavity, ABS single cavity

Note: The above are data reference values; optional output, explosion-proof, flange, sealing and temperature and pressure combinations are subject to the final selection confirmation and order code.

Selection guide

Confirm whether the medium is liquid or solid, and provide dielectric properties, dust, foam, steam and stirring conditions.
Check the beam angle and antenna size according to the effective range, installation nozzle, tank internal components and material surface shape.
Temperature, pressure, corrosiveness and explosion-proof requirements must be checked in combination, not just the upper limit of a single item.
Confirm process connection, power supply, output protocol, on-site display, Bluetooth commissioning and shell material.

specification range:Careful confirmation is required: thick foam, strong steam or condensation, serious accumulation of material at the antenna port, too long and too narrow pipe, and the installation point is facing the feed flow. When these conditions occur, the echo path should be checked first or site drawings provided.

Key points for installation and commissioning

The antenna should be aimed vertically at the surface of the medium as much as possible, avoiding the feed inlet, agitator, ladders and reinforcement ribs.
The diameter and length of the installed nozzle should match the antenna/beam, and false echo suppression should be performed if necessary.
During commissioning, enter the empty height, full position, media type and response speed, and review them once at the low position and the high position.

Procurement and Technical Confirmation Checklist

Media name, density/dielectric properties, corrosiveness, and foam, vapor, dust, crystallization or material buildup.
Container/channel dimensions, normal and extreme ranges, installation location, nozzle or bracket dimensions, internal components and on-site photos.
Process temperature and pressure combinations, wetted materials, sealing, protection, explosion-proof areas and ambient temperature.
Power supply, output protocol, wire system, display/commissioning method, control system interface and accessory requirements.
It is recommended to check the arrival acceptance: nameplate model, process connection, measuring range, material, power supply output, explosion-proof certificate and random documents.

FAQ

What media is MV-RD21S mainly suitable for measuring?

MV-RD21S is designed for solids. Common scenarios include normal temperature powder silos, granular material and mineral silos, and normal pressure solid storage facilities. If there is heavy foam, crystallization, serious hanging or extremely low dielectric constant, the echo conditions should be checked first.

What is the measuring range of MV-RD21S?

The data range of MV-RD21S is 0.1-30m; 0.3-150m. The selection should be based on the effective range, blind zone, installation height and abnormal high and low positions, and should not be selected based on the total height of the container.

What are the allowed temperatures and pressures of MV-RD21S?

The reference temperature range of MV-RD21S is -40-80℃, and the reference pressure range is -0.1-0.3MPa. The upper temperature limit and the upper pressure limit cannot be used at the same time by default, and the sealing, flange and explosion-proof configurations need to be confirmed according to the combined process conditions.

How to choose the process connection of MV-RD21S?

MV-RD21S can refer to flange ≥DN80. The final connection should be determined based on the size of the nozzle, the tank structure, the size of the antenna or probe, the maintenance space and the corrosivity of the medium.

Can MV-RD21S be connected to PLC or DCS?

The reference output configuration of MV-RD21S is two-wire DC24V / 4-20mA / HART; optional four-wire AC220V, RS485/Modbus, dual relay, FF, PROFIBUS-PA/DP. The power supply, analog or digital protocol, station number, baud rate, as well as isolation and lightning protection requirements should be unified before ordering.

What information do I need to provide when making an inquiry about MV-RD21S?

Inquiries for MV-RD21S require at least medium, range, temperature, pressure, process connection, material, explosion-proof area, power supply, output protocol, on-site photos and container size; for special process conditions, it is recommended to attach process drawings.

Ordering instructions

This page is used for procurement inquiry, technology selection and preliminary project design. Page parameters cannot replace project-level selection confirmation; when hazardous media, high temperature and pressure, explosion-proof, hygienic or strong corrosive process conditions are involved, please complete written technical confirmation before placing an order.

80 GHz Radar Level Meters