RadarRight - Radar Level Sensor - Non Contact
Non-Contact, Radar Level
For Powders / Bulk Solids

RadarRightTM Series 400



Non-contact level measurement solution...nothing to "touch" your process.
Real-time continuous output provides immediate level measurements.
No moving parts to wear which leads to long operational life and low maintenance.
Proven microwave "pulse" technology for dependable measurements
Easy set-up / configuration with LCD push button display module (included)
Small beam angle to centralize energy for high accuracy and reliability with materials
having a wide range of characteristics.
Minimal "dead band" ("blanking zone") for optimum measurement in vessel.
Gimbal (swivel) style process connection allows for aiming antenna for added measurement accuracy and avoiding internal obstacles, flow streams, etc..
Advanced microprocessor and unique echo processing technology provide for reliable operation under various process conditions.
"Pulse" technology results in extremely low emission power; is harmless towards the environment and human beings.
Can be provided with a variety of antennas and process connections - Small antenna sizes (diameters) for easy mounting.
Air purge or dust shield options to optimize sensor performance in dusty conditions.
Suitable for most powder / bulk solids applications in storage vessels up to 98.5 ft. (30m) high with 5 inch dia. antenna.
Series 200 for liquid applications is also available...Click Here

Contact MonitorNeed some more information?...Click on the button.


Principle of Operation



Antenna Selection

Output / Communications Options

Interface Options

Ordering Information Warranty  

Support Documents:

RadarRight, Series 400 Product Sheet
Application Questionnaire - Bulk Solids (Fillable PDF)



Similar Item(s):

Silo Patrol Smart Plumb Bob Level Sensor RadarRight - Radar Level Sensor - Non Contact - Liquids
  SiloPatrol® Continuous Level Sensor RadarRight(TM) Series 200 for Liquids


Principle of Operation - RadarRight Non-Contact Radar Level Sensor

The RadarRight(TM) radar level sensor emits a microwave pulse from its antenna, which travels at the speed of light to the surface of the medium below. The time-of-flight of the pulse and its reflection back to the instrument location is directly related to the empty distance in the vessel and the material level. The output from the electronics is continuously updated as the level of the material surface changes.

Radar level sensor on silo


Application for Non-Contact Radar Level Sensor - Powder / Bulk Solids

> Excellent when application requires that nothing contacts or interferes with the process.
> Strong performance for most powders / bulk solids in vessels up to 98.5 ft. (30m) tall with 5 inch (123mm) diameter horn.
> Provides measurements in dusty conditions.
> Suitable for various metal or nonmetal vessels.

> Can monitor height of material on an open area conveyor belt.

Typical applications / target materials include, but are not limited to:

> Bulk Solids
> Powders
> Granules
> Pellets
> Cement
> Aggregates
> Sand
> Coal
> Iron ore
> Metals
> Minerals
> Grain
> Feed
> Food
> Dry Ingredients
> Pharmaceuticals

> Chemicals
> Fertilizer
> Plastics
> Building materials
> Wood chips
> Ceramics production
> Glass production
> Metal production
> Pigment production
> Rubber goods
> Recycling industry
> Synthetic materials
> Textiles production
> Tobacco industry
> And more!

Antenna (Horn) Selection

4 Inch (98mm) Diameter, SS Antenna with Air Purge -
for vessels up to 49.2 ft. (15m) tall

4 inch (98mm) Diameter, SS Antenna with PFA Polymer Dust Shield -
for vessels up to 49.2 ft. (15m) tall

5 Inch (123mm) Diameter, SS Antenna with Air Purge -
for vessels up to 98.5 ft. (30m) tall

5 inch (123mm) Diameter, SS Antenna with PFA Polymer Dust Shield -
for vessels up to 98.5 ft. (30m) tall

Ordering Information - RadarRight Series 400 - Powder / Bulk Solids

Part #, Description
15-3111, Flange, “K” Style, Aluminum, Gimbal/Swivel (suitable for 4” and 5” dia. antennas)
15-3114, Flange, 4” ANSI, 316SS, Gimbal/Swivel (suitable for 4” and 5” dia. antennas)
1-2400, Spanner Wrench For Cover Removal / Tighten
RO514-22001, Belden 9322, Cable, Instrumentation, 2-Lead, Shielded (Notes 8 and 9)
R0514-18001, Cable, Instrumentation, 4-Lead, Shielded, 18 AWG 4 (Notes 8 and 9)
17-8021, Power Supply, Universal AC to 24VDC 4 (Notes 9)

1 Consult Monitor Technologies factory for all applications prior to pricing and issuing quotation.
2 For use with HMI2 Operator Interface.
8 Cable is not for plenum installations. Consult local electrical codes and verify compliance before installing.
9 Cable or power supply are not included. Must be ordered separately.


Output / Communications Options

Analog 4-20mA (two-wire, loop powered)

“Smart” RS-485 / Modbus RTU Compatible (two-wire)


Interface Options

>> LCD Push Button Display Module - included with all models
(For use with Smart RS-485 / Modbus or 4-20mA Analog models)

>> HMI2 Local Operator Interface Control Console - Optional
(For use with Smart RS-485 / Modbus models only)

>> SiloTrackTM CLOUD Web-Based Inventory Management Software - Optional
(For use with Smart RS-485 / Modbus models only)

SiloTrackTM CLOUD is a web-based application that places inventory management at your fingertips! Securely access material inventory data from continuous level sensors using any device with Internet connection. Set level alarms and receive e-mail and text notifications. Create & export configurable reports for accounting purposes and to improve inventory efficiencies. Ideal for Remote Managed Inventory (RMI) and Vendor Managed Inventory (VMI) solutions.

Click Here for more details on SiloTracK CLOUD

SiloTrack Cloud Remote Inventory Level Management Web Application


Application: Bulk Solids / Powders for Vessels up to 98.5 ft. (30m) High (with 5 inch diameter antenna)
Max. Measurement Range:
_ with 4 Inch (98mm) Diameter Antenna: 49.2 ft (15m)
_ with 5 inch (123mm) Diameter Antenna: 98.5 ft (30m)
Measurement Accuracy: ±0.39in (±10mm)
Ambient Operating Temp.: -40~150° F (-40~65° C)
Process Temperature: -40~266° F (-40~130° C)
Process Pressure: 15 psi
Dead Band: 16” to 30” (406mm to 762mm ) - Antenna Dependent
3dB Beam Angle:
_ with 4 Inch (98mm) Dia. Antenna: 8°
_ with 5 Inch (123mm) Dia. Antenna: 6°
Weight (Approx.):
_ with 4 Inch (98mm) Dia. Antenna: 7 lbs [3.2kg] without flange
_ with 5 Inch (123mm) Dia. Antenna: 9 lbs [4.1kg] without flange
Frequency Range: 26GHz
Signal Output: Smart RS-485 / Modbus RTU)Compatible (2-wire);
4-20mA Analog (2-wire, loop powered)

Power: 24VDC (16~26VDC), 1W
LCD: Standard
Housing: Die cast aluminum,
Housing Finish: Powder Coating
Process Connection: Gimbal (Swivel)
Flange Accessories: K-Flange; 4” ANSI
Antenna(s): 4” (98mm) Dia., 5” (123 mm) Dia. - Stainless Steel
Approvals: CE Mark; TUV Rheinland US/C, Ordinary Locations



Monitor Technologies LLC warrants each RadarRightTM sensor to be free from defects in material and workmanship under normal use and service for two (2) years from the date of purchase. The purchaser must notify Monitor of any defects within the warranty period, return the product intact, and prepay transportation charges. The obligation of Monitor Technologies LLC under this warranty is limited to repair or replacement at its factory. This warranty does not apply to any product which is repaired or altered outside of Monitor Technologies’ factory, or which has been subject to misuse, negligence, accident, incorrect wiring by others, or improper installation. Monitor Technologies LLC reserves the right to change the design and/or specifications without prior notice.

Part Numbers / Product Configurations

Part # > Product Configuration

Information on this page is subject to change without notice.

Last Rev.: January 01, 2019