FlowJam –
Material flow monitoring

Microwave detector for contactless monitoring
of material flows for “flow” or “no flow”

  • Absolutely insensitive against material deposits
  • For any line diameter
  • With adapter, usable up to 220 °C and 20 bar
  • With ceramic mounting, usable up to 1,000 °C
  • Compact (no separate electronics)
  • Signalling through relay switching
  • Different sensitivity levels
  • Detection through all non-conductive walls
  • Can also be supplied with short housing and separate electronics
  • Detection of material clogging and material standstill

What do you want to do?


The FlowJam detects solid flows of all types for material movement.
A differentiation is made between the following switching states:

– Material flow

– Material clogging / standstill or empty pipe

The system operates with no contact, using microwaves in a process in which the material movement is detected by using the Doppler effect.

The FlowJam is an especially process-secure device, since the microwave can penetrate material coating on the sensor and reliably detect the material movement behind it. If container walls, housings or pipelines are not metal, it is possible to measure from the outside.

The FlowJam can also be used under difficult conditions such as high operating temperatures and pressures with the help of a process adapter.

Mounting and Installation

The FlowJam can be easily installed in the following ways:

  • Figure 1: Screwing into a G 1½”-inch-threaded connection
  • Figure 2: Using a DN 40 flange
  • Figure 3: Using a pipe clamp or other holding brackets

Technical Data
Sensor Housing material Stainless steel 1.4571
Protection system IP 65
Process temperature – 20 … + 80 °C
– 20 … + 220 °C (with process-adapter)
Max. 1000 °C (with ceramic-flange)
Ambient temperature – 20 … + 60 °C
Working pressure max. 1 bar / max. 20 bar (with process-adapter)
Power supply 18 … 24 V DC / AC
Relay output max. Voltage 250 V AC
Current 1 A AC
Capacity 60 W
Response time 1 … 15 s (continuously adjustable)
Measuring frequency 24,125 GHz; ± 100 MHz
Transmitting power max. 5 mW
Weight 1.0 kg
Dimensions Housing: length of 216 mm / diameter of 52 mm
Thread: length of 30 mm / diameter of G 1 ½ Zoll

Application Examples

Click on a desired application example to navigate to a detailed description.

Material flow detection

Material: Cement
Installation: Air conveyor

Material: Animal feed
Installation: Measurement in free fall

Material: Derived fuels
Installation: Pneumatic rising pipe

Volume determination of activated coal
for the bonding of pollutants in a waste-to-energy plant

Flow metering of baking powder in free fall

Material: Dust from sugar beet chips
Installation: Free fall in DN 300 pipe

Material: abrasive metal balls
Installation: Pneumatic conveying 

Global Technology Systems

P.O. Box 799 Shalimar, FL 32579. USA
(850) 651-3388
[email protected] 


Join Our Newsletter

13 + 7 =