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Description
Dahua DHI-ARD2251E-W2(868) Draadloze externe PIRProductbeschrijving Dahua Draadloze PIR bewegingsmelder DHI ARD2251E W2(868) ondersteunt maskering en bewegingsdetectie, waardoor pogingen om het apparaat te verwijderen worden voorkomen. Het is mogelijk om cameramodules te installeren voor videobevestiging. Hij biedt bescherming tegen dieren tot 80 cm en 40 kg en bewaakt de omgevingstemperatuur. Tweerichtingscommunicatie en frequentieverspringing zorgen voor een stabiele en betrouwbare communicatie
Productbeschrijving
Dahua Draadloze PIR-bewegingsmelder DHI-ARD2251E-W2(868) ondersteunt maskering en bewegingsdetectie, waardoor pogingen om het apparaat te verwijderen worden voorkomen. Het is mogelijk om cameramodules te installeren voor videobevestiging. Hij biedt bescherming tegen dieren tot 80 cm en 40 kg en bewaakt de omgevingstemperatuur. Tweerichtingscommunicatie en frequentieverspringing zorgen voor een stabiele en betrouwbare communicatie met de alarmhub. Cloudupdates en updates op afstand via de mobiele app worden ondersteund, met dubbele redundantie en automatisch herstel in geval van mislukte updates.
Specificaties
| Indicatielampje | 1 × groene alarmindicator |
| Knop | 1 × aan/uit-schakelaar; 1 × schakelaar voor het aanpassen van het detectiebereik |
| Op afstand updaten | Cloud-update |
| Detectie van een lege batterij | Ja |
| Sabotage | Sabotage alarm |
| Bewegingsdetectie | Ja |
| Detectiemodus | PIR + Microgolf |
| Gevoeligheid | PIR: 3 niveaus instelbaar |
| Detectiebereik | Hoek: 90° Bereik: 15 m (49,21 ft), de installatiehoogte is 1 m (3,28 ft) |
| Detectiesnelheid | 0,3 m/s–2 m/s |
| Microgolffrequentie | 24G |
| Immuniteitsniveau van huisdieren | <80 cm (2,62 ft), ongeveer 40 kg (88,19 lb) |
| Weerstandsniveau wit licht | 10.000 lux |
| Anti-maskering | Ja |
| Tweeweg digitale temperatuurcompensatie | Ja |
| Scenario | Buiten, binnen |
| Bedrijfsstroom | 20 uA |
| Alarmstroom | Zonder camera: 26 mA (gemiddeld); 250 mA (maximaal) Met camera 's nachts: 380 mA (gemiddeld); 1,5 A (maximaal) |
| Draaggolffrequentie | 868,0 MHz–868,6 MHz |
| Zendervermogen (EIRP) | Limiet 25 mW |
| Communicatiemechanisme | Tweerichtingsverkeer |
| Communicatie afstand | RF: Tot 1.600 m (5.249,34 ft) in een open ruimte |
| Encryptiemodus | AES128 |
| Frequentieverspringing | Ja |
| Stroomvoorziening | CR123Ax4 |
| Levensduur van de batterij | Zonder camera: 5 jaar (activeert 10 alarmen per dag) Met camera: 3,5 jaar (activeert alarmen twee keer per week) |
| Bedrijfstemperatuur | –25 °C tot +60 °C (–13 °F tot +140 °F) |
| Bedrijfsvochtigheid | 10%–90% (RV) |
| Productafmetingen | 211 mm × 106 mm × 94 mm (8,31" × 4,17" × 3,7") |
| Installatiehoogte | 0,8 tot 1,3 m |
| Netto gewicht | 651 gram (1,44 pond) |
| Brutogewicht | 890 gram (1,96 pond) |
| Installatie | Muurbevestiging, paalbevestiging |
| Behuizingsmateriaal | PC + vriendin |
| Bescherming | IP66 |
| Certificeringen | CE |
| Corrosiewerend niveau | Basisbescherming |
| Opslagtemperatuur | –25 °C tot +60 °C (–13 °F tot +140 °F) |
| Verpakkingsafmetingen | 251 mm × 116 mm × 119 mm (9,88" × 4,57" × 4,69") |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.9 ★★★★★
Based on 5 reviews
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Product Reviews
★★★★★ 5
Repurchased in King Size – Still Love These Cooling Pillows
Size: King (2 Count), Color: Original White (Cooling), Size: King (2 Count), Color: Original White (Cooling)
After using the queen-size version of these pillows for over a year, we purchased the king-size set when we upgraded to a king mattress. Both my husband and I really like them.
The cooling feature works well, and we like that each side feels different—when I run cold, I use the softer bamboo side, while my husband prefers the cooler side since he tends to sleep hot. They fit well in our king-size pillowcases and feel supportive in all sleeping positions, whether I’m on my stomach, side, or back.
I also appreciate that you can remove some of the filling to adjust the firmness. The covers are washable, which makes them easy to maintain. Overall, we’re very happy with this repurchase and the long-lasting comfort.
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Reviewed in the United States on April 15, 2026
★★★★★ 3
Not great at cooling
Size: Queen (2 Count), Color: Original White (Cooling)
Each pillow cover has 2 sides, one marked for cooling, and the other a different fabric. The cooling side is about the same effectiveness as having a silk or satin pillow cover. It's only cool when you first touch it. The cooling side doesn't seem to absorb or wick moisture, so if you are sweaty - it keeps the moisture in place. You'll definitely want a regular pillow case over the pillow cover. In fact, if you suffer from night sweats, the non-cooling side is actually more comfortable. The pillow fill is ample, and simple to squish around for more support for your neck, etc. Think bean bag. But it will retain your impression after use. I find I need to do as I did when I had down pillows - give it a few good shakes in the morning when I make the bed to get it evened out for the coming night. In all, it is a well-made and comfortable pillow to sleep on, but it does not excel in cooling.
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Reviewed in the United States on May 29, 2026
★★★★★ 5
excellent pillows i bought two sets!!
Size: Firm Queen (2 Count), Color: Original White (Cooling)
I ordered these for my son who has neck issues and has gone through so many pillows trying to find one that he liked. They’re heavy, so i was worried that they might be “too” heavy to be able to sleep on comfortably, so I ordered a second set, one firmer than the other (just in case) and gave him a set for Xmas and he loved the first set so much without even trying the less firm ones.He also needs the cooling factor and these offered that, too. They are filled with pieces of memory foam (tons of it) and each pillow can be modified by removing some of the foam. The covers are beautiful, high quality fabric with a zipper so ts easy to remove or replace the foam pieces. The size is perfect and they keep their shape. I kept the second set i ordered rather than returning them and i love the pillows. I actually modified two by removing some of the foam pieces. I kept the foam pieces in a zippered pillow protector and i can always adjust mine when or if i need to.
1000% love these.
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Reviewed in the United States on March 22, 2026
★★★★★ 5
The Perfect Firm Pillow l
Size: Queen (1 Count), Color: Original White (Cooling)
It is everything it claims to be, cool, comfortable and strong. I got this for my husband first, he loves it and then got one for my son, he uses it to support his knees and has been sleeping much better since then.
They both needed a firm pillow that is not super soft, firm but not achy.
Finally found the perfect one.
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Reviewed in the United States on May 6, 2026
★★★★★ 5
Very nice pillowcase
Color: Smoke Grey, Size: Envelope 14x20 Inch (Pack of 2)
Very soft and they fit my pillows perfectly. The color is exactly what I ordered. I would buy again.
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Reviewed in the United States on May 23, 2026
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