SB/OEM/08-001                                                                                                                                                                   AUG 2026

Subject: Non-Genuine manufactured parts being used with OEM Products

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A. Products Affected

All Hydrastep and Hydratect electronic gauging system models within United Kingdom & EU. Refer to ANNEXE A & ANNEXE B for graphical representation of the components and system..

B. Reasons for Bulletin

To advise operators and service technicians that the use of Non-OEM Manufactured parts – specifically Electrodes – within a Hydrastep or Hydratect system will invalidate the PED and SIL Certification of that system.

C. Category

Procurement Planning, Maintenance Practices, Field Level.

D. Description

Delta Mobrey UKCA, CE, PED and SIL2 certification is only applicable to a complete OEM system that has been fully tested with an OEM controller. This includes cables, water column and electrodes assembled as a system.

The certification IES/CAT0000530347-B1, PED2014/68/EU and SIL-IEC 61508 will be void, in the event of a Non-OEM component, being introduced to the electronic gauging system.

The use of non-OEM components can have an adverse effect on the lifecycle of the other components and can cause faults, trips and give erroneous readings when in operation.

E. Implementation

Operators and service technicians must ensure that only OEM manufactured components and electrodes are fitted and used with the OEM product to maintain compliance with all applicable certifications of the complete system.

Any Non-OEM electrodes or components currently in use should be replaced at the next service interval – or as soon as practicable – to restore CE, PED, and SIL certification to the full system.

F. Planning Information

For further information please contact your local Customer Support centre.

ANNEXE A

The below graphical illustration identifies key components for our

Hydrastep system:

Item	Description	Item	Description
A	Water Column (pressure vessel)*	B	Electrode Set (LP has a unique gasket)
C	Electrode control & signal cable(s)	D	Hydrastep Control Unit & Cabinet
E	Optional Remote Display Unit	F	Optional 4-20mA / Analogue output Card & Cable

ANNEXE B

The below graphical illustration identifies key components for our Hydratect system:

Item	Description	Item	Description
A	Water Column (pressure vessel)*	B	Electrode & Insert
C	Electrode control & signal cable(s)	D	Hydratect Control Unit & Cabinet
E	Optional 4-20mA / Analogue output Card & Cable