ProGap S –
Level detection

Microwave barrier for the contactless detection
of dry bulk solids in containers, piping or shafts

  • Absolute insensitive to material caking
  • Can be used up to a profile of 18 m (larger profiles on request)
  • Can be used with adapter up to 220 °C and 20 bar
  • With ceramic mounting, usable up to 1,000 °C
  • Usable in dust EX-zones
  • Signalling through relay switching
  • Detection through non-conductive walls
  • Extra short sensor with separate analysis unit

– Now with Filling-Signal-Suppression –

What do you want to do?

Use / Function

The ProGap S microwave barrier is a universal sensor with a flexible range of applications, consisting of a transmitter and receiver on the basis of the latest microwave technology. It is used to detect the limit level of dry bulk solids of all types or to position objects. The microwave barrier is a contactless measuring procedure. It can be installed in containers, pipelines, shafts or free-fall sections. The range, depending on the model, is either 0 … 4 m or 0 … 18 m. Larger ranges can also be realised. If container walls, housings or pipelines are not metal, it is possible to measure from the outside. This even makes it possible to completely uncouple the measurement from the process through suitable windows (made of non-metallic materials). This is especially interesting in the use of aggressive, abrasive or coarse materials or in cases of extreme pressures and temperatures. With the help of a process adapter, the ProGap S can also be used under difficult conditions such as in dust ex-zones. The use of microwaves also ensures a high level of insensitivity to any caking on the sensor window.

Mounting and Installation

The ProGap S can be easily installed in the following ways: Transmitters and receivers are installed by screwing into a  G 1″-threaded connection. The device can be installed at any installation height. It is important that the transmitter and receiver have the same installation height. The adjustment takes place with the help of a counter-threaded connection. A display of the signal intensity facilitates the adjustment. The connection to the supply voltage takes place on the transmitter and the receiver. The switch output is made available on the receiver. No additional analysis unit is necessary.

Technical Data
Sensor Material Housing: Stainless steel 1.4571 / Sensor isolation: POM
Protective system IP 65
Using in EX-Zones As ProGap S Ex-sensor in DustEx-zone 20/22 and GasEx-zone 0/2 only with process-adapter
Process temperature – 20 … + 80 °C
– 20 … + 220 °C (with process-adapter)
up to 1,000 °C (with ceramic flange)
Ambient temperature – 20 … + 60 °C
Working pressure max. 1 bar
max. 20 bar (with process-adapter)
Detection range 0 … 4 m
0 … 18 m
> 18 m (on demand)
Power supply 24 V DC powered by DIN Rail electronic
Power consumption approx. 1.8 VA
Current consumption max. 100 mA
Measuring frequency K-BAND 24.125 GHz (± 100 MHz)
Transmitting power max. 5 mW
Weight Transmitter/Receiver approx. 560 g each
DIN Rail electronic Power supply 24 V DC ± 10 %
Power consumption 3.5 W
Current consumption 120 mA at 24 V
Relay (max.)
– Voltage
– Current
– Capacity
250 V AC
1 A
60 W
Fall-delay time 0.25… 5 s (continuously adjustable)
Weight approx. 172 g
Protective system IP 40

Global Technology Systems

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


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