> For the complete documentation index, see [llms.txt](https://wiki.inels.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://wiki.inels.com/inels-home/inels-wireless/devices/transmitters/detectors/rfsf-100.md). # RFSF-100 RFSF-100 flood detector - what it detects, battery, DIP switches, pairing by counting battery insertions, LED and sound, specs. *Part 3 — Unit reference · Detectors.* A battery-powered flood detector. When water reaches the two metal contacts on its underside it sends a command at once, and it also warns on the spot with a light, a sound and a vibration. The paired receiver can then act — for example close a water valve, switch on a pump or a GSM gate. The detector does not switch anything itself. {% hint style="info" %} **This detector is paired a little differently from the others.** You do not press a button on the detector. You **take out one battery and put it back as many times as the function number** (1× to 6×). Everything else is the same as pairing a wall button. {% endhint %} ![RFSF-100](https://2503278529-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FkoLW6hWCvDgagoswDVfD%2Fuploads%2FS95xNAoU65gW3yammjMC%2Frfsf-100.png?alt=media) ## At a glance | | | | ----------------- | --------------------------------------------------------------------------------------------- | | What it detects | Liquid touching both sensor contacts on the underside | | Battery | 2 × 1.5 V AAA (included) | | Battery life | 3 years (at one transmission every 12 hours) | | Low battery | LED flashes 5× every 15 minutes, or a message in the system | | Alarm on the spot | Light (blue LED), sound (more than 45 dB at 1 m, can be switched off with DIP3) and vibration | | Response time | 2 s after the contacts are connected | | Range | up to 160 m in open space | | Protection | IP62 — indoor use only | | EAN | 8595188176828 | ## Where to put it Put the detector on a flat, **non-conductive** surface where flooding is expected, **contacts facing down**, and lay it loose. Choose a place where you can see it. It detects only liquid that has **reached the contacts**. For indoor use only. **Liquids it can detect** (resistivity in kΩ·cm): drinking water 5–10 · well water 2–5 · river water 2–15 · rain water 15–25 · waste water 0.5–2 · sea water \~0.03 · salt water \~2.2 · hard water \~5 · chlorinated water \~5 · condensed water \~18 · milk, whey, juices, broth \~1 · wine, beer, coffee \~2.2 · soap foam \~18. **Liquids it does NOT detect:** demineralised and deionised water, gasoline, oil, liquid gases, paraffin, ethylene glycol, paints, bourbon and other liquids with a lot of alcohol. ## Where are the battery and the DIP switches There is **no pairing button**. Open the detector with a screwdriver — the battery holders, the **three DIP switches** and the contacts are inside. Take the insulating foil out before first use. The cover has a seal — put it back when you close the detector, and tighten the screws to keep the IP protection. ## DIP switches — set them BEFORE pairing {% hint style="warning" %} **Set the DIP switches first, then insert the batteries.** The detector saves the DIP switches when the batteries go in: the **blue LED lights for 2 seconds**. If you change a DIP switch later, take the batteries out and put them in again. {% endhint %} | Switch | OFF | ON | | -------------------------------- | ---------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | **DIP1** — normal or negated | **Normal.** On flooding the output (relay) of the paired receiver **switches on**. | **Negated.** On flooding the receiver's output **opens**; when the flooding ends it closes again. | | **DIP2** — connected to a system | For pairing with a **switching unit**. No periodic status message. | For pairing with a **system component** (eLAN-RF, RF Touch, iNELS control panel). The detector sends a status message **every 120 minutes** and on every change (flooding / end of flooding). | | **DIP3** — sound | Sound **off** when contacts are flooded (light only) | Sound **on** when contacts are flooded | **If the blue LED does not light** after you insert the batteries, reset the detector: take the batteries out, connect the insides of the two battery holders with a little pressure (picture 3 in the manual), then insert the batteries again. ### What “connected to a system” (DIP2) means DIP2 ON is for pairing with a system component (eLAN-RF, RF Touch, iNELS control panel), and the detector then sends its status every 120 minutes and when the state changes. To program the detector into those system components use the **address printed on the back of the detector**. The steps in the gateway are on the [eLAN-204](/inels-home/inels-wireless/devices/system-units/elan-204.md) pages. ## Pairing with a receiver Before you start: the receiver is powered and you know its PROG times — [Appendix A](/inels-home/inels-wireless/appendix-a-prog-button-times.md). The function number is chosen like on a wall button — see [Appendix B](/inels-home/inels-wireless/appendix-b-functions-by-number-of-presses.md) (1× pushbutton, 2× switch on, 3× switch off, 4× impulse relay, 5× delayed off, 6× delayed on). General rules for detectors: [Pairing reference § D](/inels-home/inels-wireless/pairing-and-configuration.md). There are two ways, as with the other detectors: | | Function number | What the receiver does | | ----------------------------------------- | --------------- | --------------------------------------------------------- | | **A. Immediate response** | 1 to 4 | Acts as soon as the detector sends. | | **B. Delayed return with a time you set** | 5 or 6 | Acts, and returns after the time you set (2 s to 60 min). | {% stepper %} {% step %} ### Set the DIP switches Set them as you want them (see above), batteries **out**. {% endstep %} {% step %} ### Put the receiver into programming mode Hold **PROG** on the receiver for its *enter programming* time ([Appendix A](/inels-home/inels-wireless/appendix-a-prog-button-times.md)). The LED flashes once per second. {% endstep %} {% step %} ### Open the detector and take out one battery Use a screwdriver to open the cover. Take **one** of the batteries out of the holders. {% endstep %} {% step %} ### Choose the function: insert and remove the battery Put the battery in and take it out **as many times as the function number** — 1× for function 1, 2× for function 2, and so on. **Every insertion must be answered by a flash of the blue LED**. Leave **1 second** between two insertions. {% endstep %} {% step %} ### Only for functions 5 and 6 — set the time Hold **PROG on the receiver for more than 5 s**. The receiver is in timing mode — its LED flashes **twice per second**. The time starts counting when you **release** PROG. Wait for the time you want (2 s to 60 min). {% hint style="info" %} How the timing is ended and the time stored is shown in the pictures of the [instruction manual (PDF)](https://www.elkoep.com/media/import/Elko/RFx/RFSF-100/EN/Manual_RFSF-100.pdf). {% endhint %} {% endstep %} {% step %} ### Finish Short press **PROG** on the receiver (under 1 s). Its LED goes off. Close the detector, with the seal in place, and tighten the screws. {% endstep %} {% endstepper %} ## Compatible receivers All switching units of the RF Control system (except shutter units) that are marked RFIO2 — for example RFSA-11B, RFSA-61M, RFSA-66M, RFUS-61, RFSC-61. System components: eLAN-RF, RF Touch, iNELS BUS central units (CU3-0xM). ## Radio range Up to **160 m in open space**. If the signal between the detector and the receiver is weak, use a repeater RFRP-20 or an RFIO2 unit that has the repeater function. The detector itself has no repeater function. More: [How programming works § Range](/inels-home/inels-wireless/how-programming-works.md). ## Removing the pairing The pairing is stored **in the receiver**. Use the receiver's PROG button — times in [Appendix A](/inels-home/inels-wireless/appendix-a-prog-button-times.md) — and the steps of [Pairing reference § C](/inels-home/inels-wireless/pairing-and-configuration.md): once the receiver is in clear mode (LED 4× per second), the detector has to send its signal, in the same way as when pairing. ## LED and sound reference | What you see / hear | Meaning | | ----------------------------------------------------------------------------------- | --------------------------------------------------------------------------------- | | Blue LED lights for 2 s | Battery inserted: detector active, a message was sent, the DIP switches are saved | | Blue LED flash at every battery insertion | The insertion was counted (pairing) | | LED flashes once per second, alternating with one “beep” per second | **Flood alarm** | | LED flashes alternating with two “beeps” per second | Flood alarm **and** low battery | | After a few seconds without water the signal stops and the detector sends a message | End of alarm | | LED flashes once, then 4 more times quickly, repeated every 15 minutes | Low battery — repeats until the batteries are empty | | Receiver LED once per second / twice per second / 4× per second | Programming / timing / clear mode | ## Troubleshooting | Symptom | Fix | | -------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------- | | Blue LED does not light when you insert the batteries | Reset: remove the batteries, press the insides of the battery holders together lightly, insert the batteries again. Check the polarity. | | The receiver does the opposite (closes when dry, opens when flooded) | DIP1 is ON (negated). Set it OFF, batteries out and in. | | No sound | DIP3 is OFF. | | Alarm does not stop | The contacts are still wet — the alarm ends a few seconds after the connection of the contacts is interrupted. | | Wrong function | Clear the button on the receiver and pair again; count the insertions carefully with 1 s between them. | | Works close by, not in place | Range — see above. | | Detector does not detect a liquid | The liquid is not on the list above (for example demineralised water or oil). | ## Technical parameters | | | | --------------------- | ---------------------------------------------------------------- | | Power supply | 2 × 1.5 V AAA | | Battery life | 3 years (1 transmission per 12 hours) | | Detection | contacts for flooding; contact between the sensor and the liquid | | Response time | 2 s after connecting the contacts | | Sensitivity | 99.8 % in the range 0–170 kΩ·cm | | Sound | more than 45 dB / 1 m | | Protocol / frequency | RFIO / 866–922 MHz, unidirectionally addressed message | | Repeater function | no | | Range | up to 160 m in open space | | Operating temperature | 0 to +50 °C (mind the temperature limits of the batteries) | | Storage temperature | −20 to +60 °C | | Working position | contacts facing downwards, laid loose | | Protection | IP62 | | Dimensions / weight | Ø 89 × 23 mm / 92 g | ## Downloads * [Instruction manual RFSF-100 (PDF)](https://www.elkoep.com/media/import/Elko/RFx/RFSF-100/EN/Manual_RFSF-100.pdf) * [Datasheet RFSF-100 (PDF)](https://www.elkoep.com/media/import/Elko/RFx/RFSF-100/EN/Datasheet_RFSF-100.pdf) * Product page: [RFSF-100](https://www.elkoep.com/flood-detector-rfsf-100)