Stratos MS

4-wire multiparameter devices


The digital Stratos MS multiparameter device can be configured to measure pH, ORP, conductivity (conductive/inductive) or oxygen.

  • Digital multiparameter transmitter
  • Convenient and intuitive user interface
  • VariPower 20 to 253 V AC/DC broad-range power supply
  • For digital Memosens sensors

Affordable Multi-Parameter Transmitter
With the Stratos MS, Knick is now offering a low-cost, purely digital version of its Stratos analyzers that can be configured to measure pH value, ORP, conductivity (conductive or inductive) and dissolved oxygen. Designed for digital Memosens sensors, the Stratos MS is the counterpart to the Stratos Eco analog analyzer.

Unique User Interface
The self-explanatory user interface guarantees comfortable and intuitive handling.

2-Color Backlit Display
The large, high-contrast LC display simultaneously indicates measured values and temperature in plain text as well as measurement symbols. In normal measuring mode the display is backlit white. The alarm status has a particularly noticeable red display color and is also signaled by flashing display values. Invalid inputs or false passcodes cause the entire display to flash red so that operating errors are significantly reduced. Internationally recognizable icons provide operating information and draw attention to unusual operating states.

Shatter-Proof and Corrosion-Resistant Housing
The robust PBT housing with IP 65 protection is suitable for wall, pipe or panel mounting. It is outdoor-rated and UV resistant, including the display. Empty plastic housings and plug terminals can be preassembled for easier installation.

VariPower Broad-Range Power Supply
It is shipped with a VariPower broad-range power supply for any common supply voltage (20…253 V AC/DC), ensuring proper operation even with large fluctuations in the power grid.




Catalog Excerpts

Catalog Excerpt (en)

3523 |  Stratos MS
Product Description | Specifications | Product Range
PDF (file size: 2.8 MB)


Brochure (en)

12710 |  Stratos MS
PDF (file size: 2.57 MB)

Brochure (en)

13210 |  Memosens - The complete solution for smart sensor applications.
PDF (file size: 4.3 MB)


Manual (en)

12283 |  Stratos MS A405
pH Measurement
PDF (file size: 5.05 MB)

Manual (en)

12288 |  Stratos MS A405
Conductivity Measurement
PDF (file size: 4.61 MB)

Manual (en)

12293 |  Stratos MS A405
O2 Measurement
PDF (file size: 4.22 MB)

Control Drawings

Control Drawing (en)

13074 |  Stratos EvoType A402B and Stratos MS Type A405B
Zeichnungsnummer 212.002-100, Bl. 6 (Index 2, ATEX / IECEx)
PDF (file size: 2.63 MB)

Certificates / Approvals

EU Declaration of Conformity (en)

12958 |  Stratps Evo A402N, Stratos MS A405N
Document No. EU160816A | 2016-08-16
PDF (file size: 1.31 MB)

EU Declaration of Conformity (en)

12968 |  Stratos Evo A402B, Stratos MS A405B
Document No. EU1180125B | 2018-01-25
PDF (file size: 1.82 MB)

EU Declaration of Conformity (en)

12969 |  Stratos Evo A402B, Stratos MS A405B
Document No. EU1180125B | 2018-01-25
PDF (file size: 1.82 MB)

Slide Selection Matrix Software Stratos Pro | Stratos Evo | Protos