Pool alarms and cameras compared
Choose by what you need to detect, from an opening door to movement on the deck or entry into the water.
Five kinds of pool alarm, side by side
Each type warns at a different moment, and none replaces a fence and a working gate. Tap a type to see the models we have listed for it.
- Type 1Door, window and gate alarmsA door, window or gate being opened.4 picks · $30–$60
- Type 2Floating surface alarmsWaves made by something entering the water.2 picks · $220–$300
- Type 3Subsurface alarmsUnderwater disturbance from entry.1 pick · $223
- Type 4Cameras and perimeter sensorsA person near or entering the pool zone.1 pick · $500
- Type 5Wearable immersion alarmsA child wearing the band going under water.1 pick · $200
| Type | Good at | Watch out for | Best for |
|---|---|---|---|
| Door, window and gate alarms | Warns before a child reaches the water. The alarm type CPSC names for doors on the house side of the barrier. A power safety cover or a self-closing, self-latching door are other options. | Tells you a child went out, not that one is in the water. Outdoor gates need a weather-rated unit and a working latch. | A house wall that forms part of the pool barrier, or a gate you cannot see from indoors. |
| Floating surface alarms | Self-contained and easy to move. Common for above-ground and portable pools. | The manuals we read warn that gradual entry may go unnoticed, and that wind, cleaners, returns and floating objects can interfere. | Above-ground, soft-sided or portable pools, where an in-pool sensor is awkward to install. |
| Subsurface alarms | In a 2000 CPSC study, the underwater units tested generally performed more consistently than the floating ones. That study is old, so check any current model's own evidence. | Rated for a stated pool size and shape. You take it out and re-arm it around swim time, and it needs the right water level. | In-ground pools that fit the model's tested size. |
| Cameras and perimeter sensors | Can alert before anyone is in the water, and can show you what set it off. | Needs power and a strong signal, and blind spots and night performance are worth testing. We have no independent test of AI detection. It also points a camera at your yard. | A yard where you can place a powered camera with a clear view, and where you are comfortable with the video privacy terms. |
| Wearable immersion alarms | Goes with the child, including to pools you do not own. | Only works if the band is on, charged and in range of the receiver. It is an extra layer, not a barrier. | A second layer at a pool you cannot fence, such as a rental or a relative's. |
Type 1Door, window and gate alarmsOur picks · $30–$60
Start here if the house forms one side of the barrier. CPSC asks for a UL 2017 door alarm with a short adult bypass. A lock bar is an extra layer, not a substitute.
Techko S189 Ultra Slim Safe Pool Alarm for Kids, ETL Listed UL 2017 Compliant, Indoor/Outdor Weather Resistant, 110db Loud Alarm with 2X Bypass Buttons, Gray, 1Count
Door alarm with adult bypass
For a house that forms one side of the barrier. The listing says UL 2017 compliant and ETL listed, with two bypass buttons that silence it for 10 seconds. It lists 110 to 115 dB but not the distance that was measured at, so that figure is not directly comparable to CPSC's 85 dB at 10 feet. The maker adds a secondary sensor for sliding doors with a screen.
PoolGuard DAPT-2 Water Hazard Pool Door Alarm (Newest Version)
Door alarm, listed as UL 2017
The listing says it meets UL 2017, sounds within 7 seconds of the door opening, keeps sounding until an adult resets it, and has an adult pass-through and a low-battery signal. It runs on a 9-volt battery. Check that the pass-through switch can be mounted at least 54 inches up, as CPSC asks.
Poolguard GAPT-2 Outdoor Pool Gate Alarm,White
Outdoor gate alarm
The listing says it is approved for outdoor use, battery powered, with an 85 dB horn at 10 feet. It does not list UL 2017 or a bypass. It tells you the gate opened. It does not replace a self-closing, self-latching gate.
SECURITYMAN Sliding Door Security Bar-Child Proof Sliding Door Lock Bar with Anti Lift Lock - Fits Most Doors & Windows - Adjustable Patio Door Security Bar (18.75"- 51.1") - White
High lock for a sliding door
An adjustable sliding-door bar that the listing says has a childproof lock. A bar is an added lock, not a substitute for a door alarm. Mounted high, out of a child's reach, it adds a layer. Ask your building department what your code accepts for the house-side wall.
Type 2Floating surface alarmsOur picks · $220–$300
A floating unit sounds after something has already hit the water, so it only helps if an adult can hear it and reach the pool fast.
PA-30 | Pool Patrol | Pool Alarm | Certified ASTM Safety Specification F2208 | Safe for Pool Owners with Children, Pet, Neighbors | Easy to Install with Adjustable Sensitivity
In-water alarm
The listing says it meets the ASTM pool alarm standard, detects objects of 15 lb and up and has adjustable sensitivity. It also warns it may not suit saltwater pools or pools with fountains or waterfalls. It sounds after something has already hit the water, so it only helps if an adult can hear it and reach the pool fast. We did not find an independent registry listing for this model.
Floating alarm with indoor receiver
NSF lists this model to ASTM F2208 (the 2008 edition). The listing says the receiver reaches up to 200 feet and that the unit arms itself in the water and sounds if it is lifted out. Read the manual for the pool types it covers before you buy.
Type 3Subsurface alarmsOur picks · $223
A subsurface unit sits under the water and listens for movement. Match it to your pool size and plan how you will re-arm it after swimming.
Certifier record checked · source
Subsurface alarm
NSF lists this model to ASTM F2208. The listing says it is built for pools up to 20 by 40 feet, though NSF's test used a 16 by 32 foot pool, runs on batteries, and sounds if it is taken out of the pool. Plan how you will re-arm it after each swim.
Type 4Cameras and perimeter sensorsOur picks · $500
These range from a local siren to phone alerts. Test what happens when Wi-Fi or power drops before you rely on one.
Swamcam Pool Alarm Kids Safety Camera|ASTM F2208 Certified|No Repeater | Smart Wi-Fi Camera System for In-ground & Above-ground Pools Real-time AI alerts and Live View
AI pool camera
The listing says it uses AI to detect a person before they enter the pool, has a loud local alarm that works if Wi-Fi drops, and says it meets the same ASTM pool alarm standard. It needs a wall outlet and a strong signal, and the listing says it is not designed for pets. We have not seen independent testing of AI detection, and it points a camera at your yard, so read how the maker handles the video. We did not find an independent registry listing for this model.
Type 5Wearable immersion alarmsOur picks · $200
The listing says it is not a life saving device. No federal guideline we found lists wearables as a barrier layer.
LunaSafe Child/Pet Immersion Pool Alarm/Water Alarm Kit
Wearable alarm band
A wristband kit that the listing says has about 100 feet of line-of-sight range, and that also says it is not a life saving device. No federal guideline we found lists wearables as a layer. A band can come off and a battery can run down, so treat it as an extra.
← Pool safety guide and printable checklist
Keep the four-sided fence and self-closing gate in place. A contact alarm can alert you when an opening is used. A water-entry alarm reacts after entry. Pick the warning you need, check any local requirements and make sure an adult can hear it where they actually spend time.
Jump to Compare alarm types · Compare models · Test your setup
What the standards say
ASTM F2208 covers several types of residential pool alarms. Door alarms may be specified separately under UL 2017. Verify the standard and exact model required for your setup with your building department. In a 2000 CPSC comparison, the tested underwater alarms generally performed more consistently than the tested floating units. Use that study to understand the detection tradeoffs. Today’s models require their own evidence. ASTM F2208 scope · CPSC alarm study
What CPSC asks of a door alarm. If the house forms one side of the barrier, CPSC (Pub. 362) asks for an alarm that meets UL 2017, starts within 7 seconds of the door opening, is at least 85 decibels measured 10 feet away, and sounds for 30 seconds or more. It should have a temporary bypass of up to 15 seconds for adults, with the switch at least 54 inches above the threshold, out of a child's reach. CPSC also says never to have a pet door that leads directly to the pool. A door alarm tells you a child has gone out. It does not keep one in.
Alarm models we checked the documentation for
Techko S189 for a slim door or window contact. Techko describes it as UL 2017 compliant and specifies a 10-second adult bypass. Check the exact model and mounting arrangement with your inspector, particularly if a sliding door has a second screen sensor. Techko S189 specifications
Poolguard PGRM-2 for a compatible in-ground pool. NSF lists this subsurface model to ASTM F2208 and notes a 16-by-32-foot test pool. The manual explains placement, water level, the indoor receiver and how to test. Check how you will take it out and re-arm it after swimming. NSF exact-model listing · Poolguard manual
Pool Patrol PA-30 for a floating alarm. The manual describes a tethered floating unit and separate receiver. It warns that gradual entry may go undetected and gives restrictions around cleaners, returns and floating objects. Confirm the manual and listing for the exact version you are offered. Pool Patrol manufacturer manual
Poolguard PGRM-SB2 for a floating model with a separate certification record. NSF lists this Safety Buoy model to ASTM F2208-2008. Poolguard publishes a separate manual for the floating model. Confirm the pool sizes and types covered by the manual, and match the full model number on the packaging. NSF exact-model listing · Poolguard manuals
We compared published documentation. Both Poolguard certifications are exact-model registry matches. The Techko and Pool Patrol details above come from their manufacturers. We have no comparable hands-on test results across these models or enough independent evidence to recommend an AI camera for detection reliability.
How to test the alarm you install
Follow the manual using its specified test method and equipment. Check that the signal reaches an adult indoors with doors closed. Check the low-battery signal, reset procedure and, where applicable, what happens if the internet or power goes out. Make re-arming part of closing the pool. Use a test object where the manual calls for one.
Planning to use an alarm with a cover? Ask the manufacturer to confirm compatibility with your cover type and installation.