DIN/TS 26059-1:2025-12

This document applies to the manufacture of sensors and transmitters for overfill protection devices and components for overfill protection devices in stationary and fixed containers with liquids hazardous to aquatic environment. This document specifies requirements and the relevant test methods for the components of an overfill protection device. This document has been prepared by Working Committee NA 104-02-04 AA "Überfüllsicherungen und Füllstandsanzeiger" ("Overfill prevention devices and tank content gauges") at DIN Standards Committee Tank Installations (NATank). The standard differs from DIN/TS 26059-1:2021-04 as follows: a) word "self-contained" has been deleted, as the focus is on the sensor and transmitter with any additional components, which do not, however, have to provide complete overfill protection; b) symbols have been adjusted to align them with the newly defined symbols for the DIN/TS 26059-1 and DIN/TS 26059-2 series; c) the "actuator" has been removed from the scope of application, and the corresponding subclauses 4.1.9 and 5.1.7 have been deleted; d) 4.1.4, Requirements for the sensor with transmitter, has been divided into Subclauses 4.1.2 and 4.1.3; e) "Requirements for the control device" in 4.1.6 have been specified in greater detail; f) the marking of the software version in Subclause 4.1.10 has been deleted; g) the subclauses of 4.2 have been combined into one subclause; h) clarification for identical sensors of different designs by means of representative designs in 5.1.1.2; i) visual inspection in Subclause 5.1.1.3 deleted; j) the test of the switching cycles at opposite temperatures has been deleted in Subclauses 5.1.2.1 and 5.1.2.2 and the acceptance conditions have been specified in greater detail, and it has been clarified that the sensor and transmitter can also be tested one after the other; k) the document has been editorially revised.