NTS-9000 Cesium


5071A Support Upgrade

Elproma SafeTime NTS-5000 can be synchronised directly to Cesium 5071A taking both 1PPS and ToD (UTC) reference via D-SUB9 rs232 interface. The NTS-9000 is a value-add upgrade package (available separately). After firmware update the NTS-5000 is upgraded to NTS-9000. Since year 2020, this option is also available for NTS-3000 and NTS-4000 too. As a result, Elproma delivers to market, a ready to use single cesium time server hybrid system, so-called NTS-9000. This system is available on request only and requiring long term prefatory calibration to atomic cesium clock 5071A.


The history of Elproma NTS-9000 cesium time server begins early 2000. The very first prove of concept cesium driven time server (model NTS-3000) was built for Royal Observatory of Brussel ROB and it was presented during PTTI 2004. Several other National Institute of Metrology (NMI) have purchased Elproma solution later on. They has put great effort in calibration, measurement and testing for long than decade. The real development challenge was to synchronize both frequency (PPS) and UTC phase (ToD)from atomic clocks directly using single rs232 interface – the one exclusively dedicated for cesium beam PC monitoring facility (see details on YouTube). Following NMI laboratories are partial reference of using Elproma time servers directly with 5071A cesium atomic clock (click to read PDF references from): EURAMET, VSL, SIQ, NPL, INRIM, GUM. The ready to use NTS-9000 cesium hybrid solution is available since 2005.

Trusted Time Node with NTS-9000 Cesium

“Clepsydra” Trusted Time Node with NTS-9000

NTS servers at GUM in Poland

London Time Laboratory at NPL London


NTS servers at VSL (NL)

Testing at CBK Borowiec (PL)