Features:

  • Additional PIR sensor works with Chamberlain CWA2000 base receiver (Sold Separately)
  • Weatherproof outdoor sensor with adjustable sensitivity control
  • Detects motion up to 30 feet away with wide 120-degree angle coverage
  • Transmits signal to base station (Chamberlain CWA2000) up to a half-mile away in ideal situations
  • Easy Installation / easy operation. 2 year battery life. Includes mounting bracket
  • NOTE:Kindly refer to the user manual provided as a PDF manual in the product description section
High quality & bargain price

Have used this set-up for several years. No issues... except they work just about perfectly. A base can only accomodate 4 sensors - so placement of sensors should be well thought out. Batteries have lasted well - about 1 1/2 years in each sensor. I put a little "roof" over each of my sensors - never appeared to have had any water leaking into any of the sensors, either. This is a bargain and excellent set-up. Be sure to follow the instructions - critical. There's another brand for sale through Amazon - they USED TO carry a lifetime warranty(no longer) - that is twice the price. Based upon my neighbors experience with the more expensive - well, don't waste your $. This system/product WORKS -I honestly couldn't be happier. REALLY.

I'm glad I did

I had some concern after reading some of the reviews but went ahead with this purchase anyway. I'm glad I did, it works well. For the benefit of others, here are some of my notes. The reviews that talk about heat and partial detection are correct, placement and aiming is really important. I installed these at the end of a driveway that runs east-west in an open field, so road traffic and the sun were factors. I placed two units, one each on opposite sides of the driveway, facing towards the driveway at about a 45 degree angle away from the road. Each unit was secured to a tree about 18" off the ground. I placed two opposing units because for one, I was concerned about reliability based on some reviews, and two, on cold days it does need to see something hot so I wanted to capture exhaust heat regardless of where it was placed on the vehicle. Each sensor is placed approximately 12-15 feet from the driveway, which is about 12' wide itself. This seemed to be the perfect placement; movement anywhere on the driveway activates both sensors; if you get a few fee off the driveway it only activates the nearest sensor. So far this has a 100% accuracy rate. I haven't had any confirmed false alarms; out of the handful of non-vehicle alerts we've had, a few were confirmed to be deer or dogs and others just couldn't be confirmed in the darkness. It does pick up humans; it had no problem detecting me walking down the driveway on hot days nor when I was thoroughly bundled up from head to toe on cold days. I've had no issues with the sun nor passing road traffic interfering with the sensors. The sensors have a green LED that activates and is visible through the PIR lens for about 1 second when they detect motion. It's usually not a big deal, but on a dark night while driving towards the sensors the green light stands out and quickly draws attention to the unit. If you're going for a covert installation, keep this in mind. A previous homeowner had one of these units installed very near where I installed my new units. It showed signs of corrosion, and based on other reviews I agree that water intrusion seems to be an issue. So, when I assembled my units (yes, some basic assembly is required but its not rocket science), I used clear silicone to make a good seal around the face plate, including the antenna hole and screw holes. I installed the included sun/rain shade above the units too. When I change the batteries next time I'll see how they're doing at keeping weather and bugs out. I wish I'd had some Lithium AA batteries to use when I assembled these; instead I had only alkaline batteries on hand. I'll hopefully provide an update here on how long the batteries lasted and how well they're keeping dry. The mounting plate worked well, I pre-assembled everything and just screwed the mounting plates directly to trees near the driveway using deck screws. Reception so far is good. These 2 units are placed right at 100 yards from the residence, across an open field with no obstructions aside from a few small ornamental trees. The signal then has to pass through concrete siding and 4 interior gypsum walls. The beep is loud enough (at high volume) to be heard throughout the house, even on other floors. Pairing the units with the receiver was easy enough. Things I wish were different on these: The beep when a sensor activates is a long sort of whiny squeal versus a quick chirp, and its a little irritating. Not necessarily bad for an alert, but it happens to closely mimic the washer and dryer beeps. Each sensor that is paired with the receiver gets a corresponding number of beeps. With 8 units, that's an awfully long series of irritating beeps.It would be great if the alert beeps could be adjusted (pitch of tone and length of the beep). It would be good if there was an aux output (dry relay contact) built in to the unit so this could be tied to a variety of other systems. Even better would be 8 discreet relay contacts (one for each sensor). Best would be throwing in a Z-Wave or similar smart module so you could really integrate this with other systems. With a simple sequential beep for the sensor zone number (1 beep for zone 1, 2 beeps for zone 2, etc), you run into some problems. For example, if sensors 1 and 2 activate at nearly the same time, you get 3 beeps. Well, was that sensors 1 $ 2 going off, or sensor 3? Did sensor 4 activate or was that sensor 2 twice? You get the idea. If the sensors had a unique beep pattern (for example, a high pitched tone followed by a number of low pitch tones for each sensor) it would be easier to distinguish the different sensors. In this case 'hi-low-hi-low-low' would easily be distinguishable as sensors 1&2 versus the 'hi-low-low-low' of sensor #3. The point is, the current system can be confusing across zones and there are many answers to this problem, but the manufacturer should pick one and implement it.

Workd GREAT, especially for PIGS!

We have a wild Hog problem at our ranch, destroying the property and running other game off. So, I set this up to let me know when the pigs are hitting the bait pile by the house. I put down 50 lbs. of corn on the other side of the lake, installed this Chamberlain Alert System on a 2x4 and hammered into the ground. We used to have to get up and check every 15 minutes, but now we get an alert inside letting us know that the pigs have arrived. You can make it loud enough to wake you up if needed. It's very easy to move around using a temporary set-up like this. I'm going to get another one to install on the front gate which is a mile away and the back gate which is 1/2 mile away. We tried it with this one and it works perfectly. Now we will know when someone is headed down to the lake or trying to poach our property. With the home base, we will number which alert is for the back gate, front gate and pig pile. Very impressive system, especially for the price.

Range Is What Is Claimed! Buy This Wireless Motion Detection System

I've been using the Chamberlain Wireless Motion Alert system since I built my house 12 years ago, with just a couple of motion transmitters installed along my driveway. I situated my home on the eastern border of my heavily wooded 50 acres so it could be along a waterway there. Therefore, the driveway to my home is quite long, even requiring it's own name by state law. Wanting some warning before unexpected folks interrupted my solitude, years ago I placed 2 wireless Chamberlain motion detectors several hundred feet away from the house, and was given at least some advance warning by them. At the time I believed my range to the wireless detectors was severely limited, despite the ranges claimed by the manufacturer, due to the amount of trees between my home and where the detectors were placed, and also because of the construction of my home. The first floor of the house is made of block, concrete and stucco, with a wire mesh wrapping the entire first floor that blocks out all kinds of radio and microwave signals. The second and third floors are sided with Hardiplank, a long-lasting, fire resistant siding made of compressed concrete, but which is also a signal blocker. I made do with the 2 detectors for years. However, I always wished I could have more warning than want the 2 detectors gave me. I have a 3-story home, and sometimes I just can't get to the downstairs door fast enough when someone pops up given the distance. However, that would require placing another wireless motion detector closer to my property line more than 2,000 feet from the house, quite a distance. Moreover, there is NO line of sight whatsoever between the two. Densely packed pines and hardwood trees stand between the house where the Chamberlain wireless receiver is and the property line where the detector transmitter would need to be installed.. Recently I established an office in my home that greatly increased the traffic coming and going, and I really wanted to know when someone was coming as soon as possible, especially if they were unexpected. I was purchasing some office equipment from Amazon recently and the thought of the Chamberlain driveway detectors crossed my mind. On a lark, I purchased another add-on motion detector transmitter with the idea that I would just mount it where I wanted to far away from the house and just see what happened. In a matter of minutes I had the detector connected to the Chamberlain in-home base receiver unit and mounted more than a quarter-mile away. Then I waited. I could not believe it when I eventually heard the distinctive tone of that particular motion detector alerting me that someone was approaching. I didn't have to run down the stairs in a rush to meet them. I have PLENTY of advance notice now, and the 2 previously installed detectors now let me know when the visitor is very nearby and pulling into my parking area. If you need a wireless motion detector system that does what it claims, is affordable and expandable, is inexpensive to operate, and is well-built and withstands the tests of time, then look no further and get this Chamberlain wireless system. If you do, use only lithium batteries in the outdoor motion detector units. Those batteries withstand much colder temperatures, last well over a year, and are the only way to go. What a pleasure to purchase something that does what it claims and even more.

What a relief..............!!!

I have 7 acres with a 400' driveway. Right after I bought the property I had several out-buildings broke into and trailers stolen. I installed a fence but a locked gate was a pain with several family members coming & going, so I purchased four sensors and two base units. #1 sensor is at the driveway entrance, #2 and #3 are at the out-buildings, and #4 is at my front porch. The base units are in my bedroom & kitchen. Each base unit can have 8 sensors and each senor gives off a different # of beeps......so ONE beep is someone entering my driveway, two & three beeps mean someone is at the out-buildings, and FOUR beeps is someone is on my front porch. What a relief to be pro-active and know when someone has entered my property !!!

Excellent sensor that will last a long time unless a tree falls on it

I just bought this sensor to replace one that was destroyed in a wind storm. The sensor that was destroyed was at least 5 years old and was working fine until being crushed by a 50 foot tree that also took out part of my fence. I have had good luck with these sensors but you do have to be careful where you put them. Don't put them where they will get direct sunlight right smack dab in the sensor itself or near waving tree branches. Also, be sure to use the sun shade that comes with the sensor. In my opinion, most false alarms are caused by poor placement of the sensor rather than the sensor itself. I have found that the high sensitivity setting on the sensor is perfect for detecting a person or car coming up my driveway. My alert monitor is about 80 feet from the sensor and has no problem receiving the alerts at that range. I am very happy with this system.

Great alert system!

Over 5 years ago my husband ordered the security package that included two sensors and the base because our old neighborhood was not the safest. It worked great and alerted us a couple of times when we had prowlers. Or when someone came to the door since my door did not have a peep hole. We have since moved to a better neighborhood with a larger yard. We loved the alert system so much we continued to use the old ones and were amazed how well they still functioned and they were exposed to pretty rough weather. In our new house we spend a lot of our time out in the back yard, we can't always hear when someone knocks or rings the doorbell. Because the unit also runs on batteries we carry it out with us and it alerts when someone comes into our yard. It does have have a half mile range and thus far it has worked well for us especially since we are on a half acre, the house sits closer to the front and we have a very large green space behind us. We ordered 3 extra units and were paired easily with the existing base. My husband placed the extra sensors in the back and it has picked up several of the local wild life.I did however have one that did not work properly and returned it. Chamberlain responded immediately and within 2 days of my downloading the return label and 1 day of mailing it off, I had a replacement unit. That is wonderful service! I would highly recommended the motion units not only because it works as stated but because the company response was immediate no questions asked. We've also recommended them to several friends and they love the system as well.

They just plain WORK!

We're about Maxed out on these units now.. We have them all over the ranch, and (being an electrical Engineer) I built a small circuit to allow them to work with our Alibi Security Cameras, DVRs, and Security Systems... The Range is Everything advertised, and THEN some.. Of course we own a rural Mountain Top, so there's nothing to interfere with the signal, but the range is STILL impressive! I don't know HOW they handle the problem of "False Alarms", but it's just NOT a problem.. When these Sound, there's something out there; if there's something out there, these sound! Once they sound an alarm, The Virtual Assistant that Runs our Home Automation and Security can point a High-Def Night Vision Capable Camera right at the area... It's a VERY NICE addition to the other Security Devices, Night Vision Cameras, Seismic Sensors, Capacitive Sensors, etc! I've probably sold a Hundred of these for Amazon to my Friends, and they Love them too! A sensor that constantly gives False alarms is WORSE than no alarm at all.. eventually you just quit checking a Security Device that constantly gives false alarms, and THEN you miss the the ACTUAL problem when there IS one. Tip: Use a Temporary 6 Volt Battery and "Clip Leads" to keep power on the Unit while changing the AA Batteries (I change all of ours about once a year). That way you don't have to reset all of the Alarm positions when you change the batteries. Also, Find ways to place these on Objects/Trees/Fence-Posts AWAY from your House, Pointing TOWARD the House or object to be monitored, so thieves walk right by them without noticing they just passed an alarm and set it off.

Security at quality/price

It saved our A.S.S twice. We live in a tropical country where there is a lot of unwanted visitors (with knives and sling shot) in our garden. We use these to detect any human crossing our yard. Instead of relying on a dog that may bark (or not) these will always ring and detect correctly during the night allowing us to intervene and watch over from the external camera. It will also pickup rats and cats movement. Of course it will pick up any large leaves moving during any sunny day so the sensor location is important. I've been using them for a year now and one of the sensor got water inside, maybe the humidity got in it by its antenna so from now on I put its head down. Another one broke because the batteries started leaking acid inside. Range is surprisingly good and you can set two indoor base for large house. The plastic case (housing) is strong enough to withstand our climate here (hot and humidity). Price is really good and it's working as advertised. I liked that I can install them anywhere I see fit. I've included a picture of yesterday being visited by locals crooks (you can see the sensor on their left at about 2 feet high). 1 thing that didn't work is setting the sensor for a shorter range detection (it won't go over 2 feet for any sensors).

Awesome System

Super easy set up and it works better than expected. We have one set up at the front of the driveway and a second on the back deck stairs. These allow for different tones depending on which sensor is activated - one single tone for back stairs and double tone for driveway. Great for knowing when mail and other deliveries are made, as well as for knowing when the dogs are wandering close to property line. These have been in use for a few months now and no issues. Very pleased with these. 02-24-2018 Update: Still a great purchase. I'm about to order a third sensor for an area where we will store a boat outside and decided to check out a few of the recent reviews, at which time I saw a couple comments saying the product isn't waterproof. We live on the water in a Florida location. The existing 2 sensors are exposed to the elements 24/7 and each are within 25' of standing water. We also receive regular thunderstorms, but neither of the outdoor units have failed due to water. I just opened one of them to inspect the interior components and there are no indications water has entered. We are still very pleased with our purchase and, as mentioned earlier, we will be adding a third unit to monitor an area closer to the water. Even if one of the units fail at some point, for the low replacement cost of $30 over for service in excess of a year's time....I think that is good service.

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