Protos II 4400 S/C (X) - Basic Unit

With hygienic surface or corrosion-proof coating


The Protos II 4400 (X) premium transmitter is a flexible, 4-wire device for the following process variables: pH, ORP, conductivity and oxygen.

For monitoring and controlling processes even in the most complex applications — also in hazardous areas.

Retrofits Possible, Future-Proof
Protos II 4400 (X) features a unique modular design and freely accessible wiring with a clear layout. The option for easy retrofitting and upgrading ensure planning security today and in the future. Different Ethernet and Fieldbus modules enable digital communication and seamless integration into automation systems.

Wide Sensor Selection
Protos II 4400 (X) is the only process analysis system that can be flexibly combined with Memosens and other digital or analog sensors — in multi-channel mode as well.
With Memosens technology, up to 4 measuring channels can be imple-mented in parallel.

Status Messages acc. to NE 107
All status messages for maintenance requests, failure, out of specification, and function check (HOLD) are output as specified in NE 107.



Catalog Excerpts

Catalog Excerpt (en)

14501 |  Protos II 4400 (X)
Product Description | Specifications | Product Range
PDF (file size: 10.76 MB)


Brochure (en)

14506 |  Protos II 4400 (X) - Ready for the Future
PDF (file size: 2.52 MB)


Manual (en)

14602 |  Protos II 4400(X) Process Analysis System
FRONT and BASE Modules
PDF (file size: 7.63 MB)

Installation Instructions (en)

14542 |  Protos II 4400(X) Process Analysis System
FRONT and BASE Modules
PDF (file size: 2.06 MB)

Installation Instructions (en)

14619 |  Protos II 4400(X) - Replacement of FRONT Module
PDF (file size: 0.88 MB)

Certificates / Approvals

EU Declaration of Conformity (en)

14666 |  Protos II Type 4400*/***
Document-No. EU190130B | 2019-01-30
PDF (file size: 0.32 MB)

EU Declaration of Conformity (en)

14671 |  Protos II Type 4400X*/*** | Front 4400XC-015 & Front 4400XS-015
Document-No. EU190503A | 2019-05-03
PDF (file size: 0.32 MB)

EU Declaration of Conformity (en)

14656 |  Protos II Type 4400X*/***
Document-No. EU190130A | 2019-01-30
PDF (file size: 0.32 MB)