The sun is setting on 2G and 3G, are your hatch protection systems 4G ready?

As of April 1st 2023, all new Watercress 4 systems will come with 4G modems installed as standard.

New 4G capable systems will enable a smooth and hassle-free transition to the 4G network, allowing our clients to upgrade their SIM provisioning prior to the 2G/3G sunset, saving valuable time and resources.

All newly supplied systems and replacement PCBs remain backward compatible with legacy 2G/3G networks and SIM cards, whilst those networks are still active.

We have a number of options available to clients currently using older generation Watercress systems which will require an upgrade prior to the expected 2G/3G sunset.

For more information, please contact us at or call 01934 743440.


Sentinor would like to welcome their new employee Joe to the team.
 Joe will be working as a workshop technician, manufacturing and testing Sentinor's Watercress alarm systems and sensors.

From the 1st of April 2021, Sentinor will be increasing the price of paging system servicing and site visits from £340 to £440.

Book your paging system service in now to save money before the price increases.

Site visits and services can be scheduled to take place after the 1st of April 2021 but must be booked in before the 31st of March 2021 to take advantage of the current pricing.

Call: 01934 743440

Sentinor have achieved a 100% score in a recent ISO9001 audit.

At Sentinor, quality is always at the forefront of everything we do, from manufacturing to site servicing and installation. ISO9001 ensures that all products and services supplied by Sentinor are of the highest standard.

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Sentinor Ltd 2019