In line mass flow measurement sensor

Mass Flow Measurement Sensor




The QuantiMass(TM) mass flow / solids flow sensor (meter) measures the flow of quantities in pneumatic conveying & free-falling processes for powders, dust, bulk solids, pellets, and granular up to 0.75 inch (2cm). The solids flow sensor (meter) is based on the latest microwave technology and provides fast, continuous in-line (online) measurements of the powder or bulk solid material. The sturdy, non-intrusive design of the sensor minimizes maintenance. Also, the compact size of the sensor makes for easy installation into existing processes.  Available with a DIN-rail transmitter (PRO Version) or controller (ULTRA Version) to provide output.  


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Measure flow of quantities in pneumatic conveying & free-falling processes
In-line (on-line) measuring without the use of weight scales
Latest microwave Doppler effect technology to provide typical accuracies of 1% - 3%
Compact size for easy installation into existing processes
Sturdy, non-intrusive sensor design minimizes maintenance
Fast measuring & adjustable sensitivity
Integrator / Totalizer feature, through the Ultra series controller, provides a sum of the mass flow for a period of time
Suitable for powders, dust, pellets, and granulars up to 0.75 inch (2cm)

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Principle of Operation



Version Selection

Ordering Information



Support Documents:

QuantiMass Ultra Product Sheet

QuantiMass PRO Product Sheet

Application Questionnaire (Excel)

Bulletin Button

Similar Item(s):
SFD Solids Flow Detector
Models SFD-2 and SFI Solids Flow Monitors


Principle of Operation

The QuantiMass Mass Flow Measurement Sensor / Meter is designed with the latest microwave technology and is used to continuously quantify the flow of powders & solids being conveyed in metallic pipes. The QuantiMass is based on technology that has been developed and proven over several years. The measurement process of the sensor is centered on the Doppler effect. The mass flow-rate is determined by evaluating the frequency and amplitude changes during the measurement process. Particles at rest, such as deposits, do not influence the measurement. All powders, dust, pellets and granules can be measured reproducibly, up to the size of 0.75 inch (2cm). The QuantiMass sensor is suitable for continuous in-line / on-line measurements in pneumatic conveying or in free-fall pipelines.

Mass Flow Meter



Typical Applications include, but are not limited to:

> Feed and grain industries
> Food industry
> Building materials industry
> Wood dust
> Coal dust
> Ceramics production
> Cement industry
> Chemical industry
> Detergent industry
> Fertilizer industry
> Glass production
> Metal production
> Pharmaceuticals
> Pigment production
> Plastic industry
> Rubber goods
> Recycling industry
> Synthetic materials
> Textiles production
> Tobacco industry

In-Line Mass Flow Measurement Application Examples:

Mass Flow-Dry Sand
Mass flow sensor in a dry sand application 
Mass Flow-Coal Dust
 Mass flow measurement for coal dust burner injection
 Mass Flow Plastic Powder App
Mass flow sensor in a plastic powder application 
Mass Flow-Cement
Mass flow sensor in a cement application 
Mass Flow Image 3
Mass flow measurement for tobacco
   Mass Flow Feed App
Mass flow measurement for feed pellets 

Version Selection

Ultra Series
A complete QuantiMass Ultra system consists of the controller and the sensor. The controller provides graphic user interface with softkeys and a clearly arranged display of the measured, alarm and MIN/MAX values, combined with easy editing and parameterization for simple operation. In addition, up to 24 different product parameters can be stored in the controller to accommodate product or process changes. The Ultra series controller has an Integrator / Totalizer feature that provides a sum of the mass flow for a period of time.

In-Line Mass Flow Measurement Sensor - Ultra Series
A complete QuantiMass Ultra system includes a sensor and controller.

PRO Series
A complete QuantiMass PRO system consists of the DIN-Rail transmitter and the mass flow measurement sensor. The DIN-Rail transmitter allows for easy integration into an existing control system. Calibration software is provided. In addition, up to 24 different product parameters can be recorded to accommodate product or process changes.

(Optional BCD Product Characterist Switching - Up to 15 Product Char.)

Complete On-Line Mass Flow Measurement System - PRO Series

A complete QuantiMass Pro system includes a sensor, DIN-rail Transmitter and Configuration Software.

Ordering Information

Part #, Description
17-3401, Welding Branch, Steel
17-3402, Welding Branch, 304 SS
17-3403, Welding Branch, 316 SS
R0514-18001, Cable, 4-Wire, Shielded, 18 AWG (1)

(1) Cable is not included. Must be ordered separately.


Part #, Description
17-3401, Welding Branch, Steel
17-3402, Welding Branch, 304 SS
17-3403, Welding Branch, 316 SS
17-3412, Welding Brach, 304 SS (For 450 Degree C Hi-Temp Sensor Only)
R0514-18001, Cable, 4-Wire, Shielded, 18 AWG (1)
17-8021, Power Supply, Universal AC to 24VDC (1)

(1) Cable or power supply are not included. Must be ordered separately.




Process Data
Pipe diameter: 1” to 12” (25mm to 300mm)
Particle size: .001 micron to 0.75” (1nm to 20mm)
Moisture: Depending on the product
Pressure: Up to 6 bar (Option uo to 30 bar)
Temperature: -4 to +194°F (-20 to +90°C)
(Higher temperatures on request)

Sensor Data
Medium touched parts: 304S S (1.4307) or 316 SS (1.4571)
and Polyamide 6.6
Process connection: Specialty welding branch
Housing material: 304 SS (1.4307) or 316 SS (1.4571)
Protection class: IP 65
Ambient Temperature: +14 to 158°F (-10 to +70°C)
Sensor Dimensions: Approx. 11.42”L x 2.36” Diameter (Approx. 290 x 60mm)
Sensor Dimensions (450°C Hi-Temp Version): Approx. 12.33”L x 3.00” Diameter (Approx. 313.2 x 76.2mm)
Sensor weight (approx.): 3 lbs. (1.4 kg)
Sensor weight (approx.): 4 lbs. (1.8 kg) - 450°C Hi-Temp Version
Accuracy: 1 to 3% typical
Power: Via transmitter (PRO) or via controller (Ultra)
Interconnection: 4 wires, shielded, 3280 ft (1000m) max
Welding branch dimensions: 3.94"L x 1.18" Diameter (100 x 30mm)
Welding branch dimensions (450°C Hi-Temp Version): 3.94"L x 1.38" Diameter (100 x 35mm)

Desktop Controller (for Ultra Series)
Response time: Approximately 1 second
Averaging time: 0 – 999 seconds
Power supply: 115 VAC / 24V AC/DC or 230 VAC / 24V AC/DC
Outputs: ¼ VGA-LC Display, relay, analog, RS-485
Controller dimensions (Desktop Model): 9.33” x 5.22” x 11.61” (237 x 132.5 x 295mm)
Dependent on model selected

Transmitter (for PRO Series)
Construction: Housing for 35mm DIN-Rail (EN 50022)
Input power: 24 V AC/DC (Power supply ordered separately)
Ambient temperature: +14 to +140°F (-10 to +60°C)
Protection class: IP 30
Output signal: 0/4-20 mA (max. 750 Ohm); 0/2-10 Volt
Interfaces: RS-232, RS-485
Transmitter dimensions: 4.53in L x 0.89in W x 3.94in H (115 x 22.5 x 100mm)
Transmitter weight (approx.): 0.33 lbs. (0.15 kg)



Monitor Technologies LLC warrants each QuantiMassTM System 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


Last Rev.: March 26, 2021