Respuesta corta: Senstar retired Intelli-FLEX in 2014 and FlexPS in 2019, and ended all FlexPS repair services on 14 March 2024. If either processor fails today, there is no factory repair path. RBtec’s IRONCLAD (chain link and flexible mesh) and MicAlert (welded mesh, palisade and rigid fence) are drop-in modern replacements that work with your existing sensor cable: same 300 m class zones, same dual-zone processor architecture, same dry-contact relay outputs into the alarm panel or VMS you already run, and both are in production with a warranty.

Where FlexPS and Intelli-FLEX stand today

Intelli-FLEX (and Intelli-FLEX II) was Senstar’s microphonic fence sensor of the 2000s; it was retired in 2014 and succeeded by FlexPS, which used the same sensor cable family and the same dual-zone architecture. Senstar’s FlexPS retirement bulletin (No. 2016PB005C) then set out this timeline:

Milestone	Date
Retirement bulletin issued	14 February 2019
Last order date, no new sales after	30 June 2019
Repair moves to “reasonable effort” basis	31 December 2022
All repair services discontinued	14 March 2024

The bulletin points existing customers to FlexZone, FiberPatrol or LM100. It does not offer a migration kit, a cable reuse path or pricing, and Senstar publishes no FlexPS replacement page. That leaves every FlexPS and Intelli-FLEX site with the same decision: keep running unsupported hardware, or replace it on your own terms.

What FlexPS and Intelli-FLEX were, and what replaces them

Both were fence-mounted microphonic sensors. A coaxial sensor cable (MEX or Mark 2) clipped to the fence fabric picked up the vibration and sound of cutting, climbing and crawling under, and a dual-zone processor on the fence line analyzed it. RBtec’s fence sensors work on exactly the same principle, which is why the swap is direct.

	Senstar Intelli-FLEX II (retired 2014)	Senstar FlexPS (retired 2019)	RBtec IRONCLAD	RBtec MicAlert
Tipo de cerca	Chain link (9 ga min), weld mesh, palisade, barbed wire, wooden	Chain link, weld mesh, expanded metal; palisade with Mark 2 cable	Malla ciclónica, malla flexible, alambre soldado sobre alambre tensor	Malla electrosoldada (358), palizada, hierro forjado, paneles rígidos
Max zone length	305 m (1,000 ft)	300 m (984 ft)	305 m (1,000 ft)	305 m (1,000 ft)
Zones per processor	2	2	2 or 4 (LPU-402 / LPU-404)	2
Cable del sensor	Coax sensor cable, spliced in the field	MEX or Mark 2 coax, spliced from 100–150 m lengths (both reusable with RBtec LPU)	Stainless-steel braided sensor cable, pre-cut 75 / 152 / 305 m	Microphonic sensor cable, pre-cut 75 / 152 / 305 m
Detecta	Cut, climb over, crawl under	Cut, climb over, crawl under	Cut, climb, lift	Cut, climb, lift
Salidas	Separate alarm and supervision relays per zone	4 Form C relays	Dry-contact relays per zone plus tamper and power-fail relays; optional RS-485 or IP	Dry-contact relays per zone plus tamper and power-fail relays
Sensitivity setup	Adaptive signal processing, manual calibration	Calibration in maintenance mode	Self-calibrating; fine tuning by buttons or software, 500 levels	500 software levels; 22 on-board levels per zone
Alimentación	18–56 VDC, 3 W, 8 h gel-cell backup	12–48 VDC	12–24 VDC, 300 mA at 12 V	12–24 VDC, 300 mA at 12 V
Temperatura de funcionamiento	Not published	−40 to +70 °C	−40 to +105 °C	−40 to +105 °C
Cable warranty	— (product retired)	— (product retired)	10 years	2 años
Repair	Discontinued	Discontinued 14 Mar 2024	Modular boards, swappable in the field	Modular boards, swappable in the field
Status	End of life	End of life	In production	In production

Specifications are taken from Senstar’s Intelli-FLEX II Product Guide C6DA0602 Rev K (2008) and FlexPS Product Guide G5DA0102 Rev G (2015).

Which RBtec sensor replaces your FlexPS or Intelli-FLEX?

It depends on the fence, not the old processor.

• Intelli-FLEX or FlexPS (MEX cable) on chain link or weld mesh → Sistema de alarma de cerca IRONCLAD. Same flexible-fence use case, same zone lengths.
• Intelli-FLEX or FlexPS (Mark 2 cable) on palisade or vinyl-coated rigid fence → Cable sensor microfónico MicAlert. Mark 2 was Senstar’s higher-sensitivity option for rigid fence; MicAlert is built for that job.
• Very long perimeters, or sites tired of processors on the fence line → RaySense fiber optic. One cable, up to 100 km, no field electronics, locates events to a few meters.

What you keep, what changes

A FlexPS or Intelli-FLEX replacement is far smaller than a new installation, because the expensive parts of the old system are the parts that do not change.

You keep

• The sensor cable on the fence. Existing FlexPS and Intelli-FLEX sensor cable can be connected to the RBtec LPU processor. If the cable is intact, it stays on the fence. If sections have failed after years of UV and weather, only those zones are re-cabled with RBtec cable, which ships pre-cut to zone length.
• The fence and its condition work (tensioning, cleared vegetation, tightened fittings). Senstar’s guide required the same preparation ours does.
• The zone plan. A 300 m FlexPS or 305 m Intelli-FLEX zone maps directly onto a 305 m IRONCLAD or MicAlert zone, so zone boundaries, gate bypasses and camera presets stay where they are.
• The processor locations, power feeds, enclosure posts and conduit.
• The alarm wiring. FlexPS and Intelli-FLEX reported on dry-contact relays; so do IRONCLAD and MicAlert. The panel, VMS or SCADA input does not know the difference.

What changes

• The processor. One RBtec LPU per two zones, mounted in the same location, wired to the existing sensor cable and the existing relay outputs.
• Calibration. IRONCLAD self-calibrates to the fence when it powers up; fine tuning is done on the unit or in software, without a paid certification course.

Because the cable stays on the fence, a typical two-zone site is a processor swap: one technician, a few hours per processor, and a walk test of each zone.

Why not just move to FlexZone?

You can. FlexZone is a capable product, and for a site that needs ranging (locating a cut to within a few meters on one long cable) it may be the right answer. Before you do, ask:

• Do you need ranging? Most FlexPS and Intelli-FLEX sites were designed around 300 m zones and cameras preset per zone. A zoned replacement keeps that design working. Ranging is worth paying for on very long fences with few cameras, and RBtec’s answer to that requirement is RaySense fiber optic.
• What does support cost? Senstar’s baseline is a 3-year warranty with limited factory support; 2-business-day advance replacement and 24/7 access require a paid Senstar Care contract. IRONCLAD cable carries a 10-year warranty, and the processor boards are swappable in the field.
• Who commissions it? FlexZone commissioning goes through Senstar-certified installers. RBtec systems are set up by your own integrator with direct engineering support from us.

Siguiente paso

Send us your zone plan, fence type and cable type (Intelli-FLEX, FlexPS MEX or Mark 2), and we will return a like-for-like bill of materials and a migration plan within one working day. Póngase en contacto con RBtec.

Preguntas frecuentes

Senstar, FlexPS, Intelli-FLEX, FlexZone, FiberPatrol and LM100 are trademarks of Senstar Corporation. RBtec is not affiliated with or endorsed by Senstar. Product names are used only to identify the systems being replaced. Senstar specifications are quoted from Senstar’s published product guides and retirement bulletin.