FlowJam S - Material detection

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FlowJam S -
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
  • Usable in dust ex-zones
  • Detection through all non-conductive walls
  • Can also be supplied as compact device with integrated electronics
  • Detection of material clogging and material standstill

Use / Function

The FlowJam S 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 S 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 S can also be used under difficult conditions such as high operating temperatures and pressures as well as dust and gas ex-zones with the help of a process adapter.

Mounting and Installation

The FlowJam S can be easily installed in the following ways:

  • Screwing into a 1 ½-inch-threaded connection
  • using a DN 40 flange as well as
  • using a pipe clamp or other holding bracket 

Technical Data

Sensor Voltage 12 V DC - powered by transmitter
  Power consumption approx. 1.5 W
  Housing Stainless steel 1.4571
  Protection system IP 65
  Using in EX-zones Dust EX-zone 22
Dust EX-zone 20/22 (with process-adapter)
  Process temperature -20 ... +80 °C (standard)
-20 ... +220 °C (with process-adapter)
-20 ... +1000 °C (with ceramic-flange)
  Ambient temperature -20 ... +60 °C
  Working pressure max. 1 bar (standard)
max. 20 bar (with process-adapter)
  Detection range 0 ... 2 m (dependent on application)
  Required material speed for detection min. 0.1 m/s
  Measuring frequency K-Band 24,125 GHz (± 100 MHz)
  Transmitting power max. 5 mW
  Dimensions Housing: 103 mm / Ø 52 mm
Thread: L 30 mm / Ø G 1 ½"
  Weight approx. 560 g
Transmitter Power supply 24 V DC ± 10 %
  Power consumption approx. 3.5 W
  Relay (max.)
- Voltage
- Current
- Capacity

110 V AC
1 A
60 W
  Fall-delay time 1... 15 s (continuously adjustable)
  Weight approx. 172 g

Application Form

Application Form



Application examples

Click on the product picture to enlarge the image

Plastic granulate
in free falling behind rotary valve

Active carbon exhaust -
air treatment in heat exchanger

Carbon dust feed
of primary firing in rotary kiln


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