Nothing appears to be happening.
The E20 sits on a laundry floor, under a sink or beside a hot-water system. It can run on one 1,400 mAh CR123A battery for up to five years under normal conditions.
eufy Flood and Freeze Sensor E20 | Brand New
$69.95
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eufy Flood and Freeze Sensor E20
Condition Brand New
$69.95
Know before you buy
The quick decision check
- Condition
- Brand New
- Stock
- Available now
- Delivery
- Australia Post Express $12.95 or Standard $9.95. Express is free once your order reaches $99.
- System
- Alarm accessory - HomeBase required
- Recording mode
- Event alerts
- Compatible hubs
- HomeBase 2, HomeBase 3, HomeBase Mini, HomeBase Professional S1
- What you need
- One compatible HomeBase required
Included items: Read this listing's contents before choosing accessories. A condition grade alone does not tell you which parts or packaging are included.
Compatibility: Needs one compatible eufy HomeBase to operate — HomeBase Mini (firmware v4.0.5.2+), a HomeBase 2 released after 2021 (v3.4.1.2+), HomeBase 3 (v3.7.2.6+) or HomeBase Professional S1 (v4.1.4.3+). It does not work on its own and no hub is included.
AU or US HomeBase both pair fine — the “requires a US-version HomeBase” line on some eufy pages does not hold in practice.
What you need to install it
Read the customer reviews
- Install type
- DIY
- You’ll need
- A compatible eufy HomeBase (not included)
- Tools
- None - sits at floor level at the leak point
- Time
- Under 10 minutes once your HomeBase is set up (estimate)
Optional extras
Add the extras you need
Check each listing for the exact model pairing and included parts. Unavailable options are left out.
This adds the product shown above and every selected extra in one step. Use the regular Add to cart button for the product on its own.
CamGuard Australia
A CamGuard Australia original product-page picture
This winterTheLeakening
It waited behind the washing machine. This waited for it.
eufy Flood and Freeze Sensor E20 · starring one 75 dB local alarm · featuring a 1.2 m slim probe · powered for up to five years · a compatible eufy HomeBase is required and is not included
Now showing · on your laundry floor
Flood detectionConfigurable freeze alert75 dB local alarm at 10 cm1.2 m extension probeUp to five-year batteryNo monthly fee
BN
Brand new classification
Factory sealed. Full original retail packaging. The eufy carton is unopened and its factory seal is intact for you to break.
Read this before the feature begins
This is an accessory, not the whole system.
The Flood and Freeze Sensor E20 needs a compatible eufy HomeBase to operate. A HomeBase is not included. Alone, this sensor does nothing: there is no hub-free, Wi-Fi or direct-to-phone mode.
Required co-starHomeBase Mini, HomeBase 2 made after 2021, HomeBase 3 or HomeBase Professional S1—each on the minimum firmware listed below. Check yours before buying.
The story in four scenes
Water bridges the contacts.
Metal contacts on the underside detect the water. The LED flashes red twice, the built-in alarm sounds, and the alert travels to your HomeBase.
The HomeBase calls your phone.
The sensor uses its Sub-1G link to report to the hub. The quoted maximum is 200 m in open space; walls, tiles, brick and metal appliances reduce real-world range.
You still turn off the water.
This product detects and reports. It does not contain a valve, shut off plumbing, drain a room or summon a plumber. The practical ending is still written by a human with access to the tap.
Meet the cast
Six small parts. One expensive plot twist noticed early.
Lead detection
Metal contactsWater crossing the contacts on the base triggers the event. No invented AI story: metal, water, alarm.
Cold open
Freeze alertSelect 32, 33, 35, 37 or 40°F in the app. Temperature sensing accuracy is within ±1°C.
Practical effect
Slim probeA 1.2 m cable with a probe under 0.5 cm thick reaches gaps where the sensor body and your hand will not fit.
Sound department
75 dB alarmRated at 10 cm. The alarm repeats at most once a minute; the HomeBase phone alert is the part that travels farther.
Long engagement
Up to five yearsOne included 1,400 mAh CR123A battery. Actual life varies with use, environment and alert activity.
Wardrobe
70.1 × 27.5 mmIP54 splash and dust resistance. Indoor placement only; the sensor detects water but is not built to live submerged in it.
I
Act one · the gap
The business end goes where the trouble starts.
Keep the sensor body somewhere sensible and feed the probe beneath a dishwasher, behind the washing machine or into a narrow cabinet gap. At under 0.5 cm thick, the probe reaches the place you would otherwise inspect only after standing in the result.
II
Act two · two climates
Flood everywhere. Freeze where freezing is real.
The water half makes sense in every postcode. The cold half depends on yours. Most of coastal Queensland may never reach the selectable freeze thresholds; Tasmania, alpine districts, inland tablelands and frost-prone sheds or holiday homes are a different story.
Wet-country cut
H₂O
Buy primarily for leaks beneath washing machines, sinks, dishwashers and hot-water systems.
Frost-country cut
32–40°F
Choose a threshold in the app. Operating temperature is −10°C to 50°C; sensing accuracy is within ±1°C.
III
Act three · the sound mix
Loud where it happens. Connected where you are.
When water is detected, the onboard buzzer is rated at 75 dB measured from 10 cm and the LED flashes red twice. It is not a whole-house siren claim. The connected HomeBase is what relays the event into the eufy Security app.
75 dB
Measured at 10 cm. The buzzer repeats at most once per minute. A television, closed doors and distance all matter, which is why the hub-delivered phone alert is central to the system.
Admission requirements
Will your HomeBase admit this sensor?
Green tickets are compatible at the stated minimum firmware. The amber ticket carries an extra age condition.
MINI
eufy HomeBase Mini
Firmware v4.0.5.2 or above.
Admit one
S280 / 2
eufy HomeBase 2
Firmware v3.4.1.2 or above and the HomeBase must have been released after 2021.
Check year
S380 / 3
eufy HomeBase 3
Firmware v3.7.2.6 or above. HomeBase 3 supports up to 16 cameras plus 34 sensors.
Admit one
PRO S1
HomeBase Professional S1
Firmware v4.1.4.3 or above. Professional S1 supports up to 16 cameras plus 32 sensors.
Admit one
No
No HomeBase; original HomeBase 1; HomeBase E; a pre-2021 HomeBase 2; direct pairing to a phone; a camera, doorbell, SoloCam, smart lock or Keypad acting as a hub; or a third-party platform replacing the HomeBase. Those are not supported substitutes. The HomeBase is required and is not in this box.
Classification board notes
What this picture does not promise.
The limitations are part of the product, not material to hide after the credits. Read these before deciding whether this is right for the room and system you actually have.
It does not pair straight to your phone over Wi-Fi or Bluetooth. A compatible, online HomeBase is required.
There is no valve or plumbing control. It detects and alerts; you or another person still stop the water.
Use it indoors on a normally dry surface. Not outdoors, in a tank, sump or anywhere the device may sit underwater.
Walls, brick, tiles, metal appliances and the HomeBase location reduce the quoted line-of-sight maximum.
Rated at 10 cm and repeated at most once per minute. It is not marketed here as a neighbour-waking siren.
If 32–40°F is unrealistic at your site, buy for water detection rather than pretending the cold feature will matter.
The included cell is replaceable, but five years from now you may need a camera, hardware or online retailer to source one.
The local buzzer is physical; setup, configuration and remote phone notifications use the eufy Security system and HomeBase.
Four-frame setup storyboard
No sequel required.
01
Pull the tabRemove the battery tab and open the eufy Security app on a phone already signed in.
02
Add to the systemTap “+”, choose Alarm System, select your already-online HomeBase and add the Flood and Freeze Sensor E20.
03
Place the sceneStand it on the floor, attach it with adhesive or use the supplied screw mounting. Feed the probe into the tight gap if needed.
04
Test the endingWet the contacts as directed during setup and confirm the buzzer and phone alert actually arrive.
Property department inventory
Everything in the sealed carton.
01Flood and Freeze Sensor E20Included
011.2 m extension cable with slim probeIncluded
011,400 mAh CR123A battery, installedIncluded
013M adhesive setIncluded
01Preinstalled bracketIncluded
01Mounting screw setIncluded
01Printed Quick Start GuideIncluded
00eufy HomeBaseNot included
Premiere information
From our shelf in Townsville to your floor.
Sent from Townsville, Queensland. Same-day to one-business-day dispatch is typical; busy periods can occasionally extend that.
Australia Post Express is included on orders over $99. Under $99, postage is $9.95 tracked or $12.95 Express.
The warranty on this page is CamGuard Australia's own warranty, honoured by us—not a manufacturer warranty.
If the item is faulty or not as described within 12 months, we cover the return postage.
Change-of-mind returns are accepted within 30 days of delivery. The buyer pays return postage and the original shipping is not refunded.
Nothing here limits your rights under the Australian Consumer Law.
Product specifications
- HomeBase requirement
- Required — HomeBase Mini (v4.0.5.2 or above), HomeBase 2 / S280 (v3.4.1.2 or above, released after 2021), HomeBase 3 / S380 (v3.7.2.6 or above) or HomeBase Pro (v4.1.4.3 or above); not included
- Detection method
- Water contact probe and temperature sensor — freeze alarm triggers below 4 °C
- Detection range
- Includes a 1.2 m (3.9 ft) extension cable with a slim probe under 0.5 cm thick, for tight spaces under appliances
- Power
- 1 × CR123A battery, 1,400 mAh
- Battery life
- Up to 5 years under normal conditions (eufy internal lab testing; actual performance may vary)
- Wireless range
- Up to 200 m (656 ft) in open air
- Weather resistance
- IP54 (dust-protected, protected against splashing water)
- Sound level
- 75 dB local alarm
- Color
-
- White
- Power source
-
- Battery-powered
- Connectivity technology
-
- Wireless
- Alert type
-
- Sound alarms
Proof from real orders
Customer reviews
Product feedback and verified-buyer experiences collected by Judge.me.
Director commentary · lift a question
The answers after the credits.
Do I really need a eufy HomeBase?
Yes. A compatible HomeBase is required and one is not included. Supported options are HomeBase Mini v4.0.5.2+, HomeBase 2 v3.4.1.2+ released after 2021, HomeBase 3 v3.7.2.6+, or HomeBase Professional S1 v4.1.4.3+.
I have a HomeBase 2. Will it work?
Only if it was released after 2021 and is running firmware v3.4.1.2 or later. Both requirements matter, especially when buying an older second-hand hub.
Will it pair directly with my phone?
No. There is no direct Wi-Fi, Bluetooth or hub-free mode. The sensor communicates with the HomeBase; the HomeBase provides the connection to the eufy Security app.
Will it shut the water off?
No. It contains no valve and does not control plumbing. It detects water or the configured freeze threshold and alerts you; stopping the water is still a separate action.
Can I put it outdoors or in a tank?
No. IP54 means splash and dust resistance, not weather exposure or submersion. Use it indoors on a dry surface that you want monitored for unexpected water.
How loud is the alarm?
The onboard alarm is rated at 75 dB measured at 10 cm and repeats at most once per minute. We do not describe that as a whole-house siren. Remote notifications depend on the connected HomeBase and app.
How does the freeze alert work in Australia?
You can select 32, 33, 35, 37 or 40°F in the app, with sensing accuracy within ±1°C. It is meaningful in frost-prone areas; in much of coastal Queensland, the water-detection half is likely to matter more.
Is there a subscription?
No monthly plan is required for the product functions described here. You do need a compatible HomeBase, the eufy Security app and the relevant account setup.
What battery does it use?
One replaceable 1,400 mAh CR123A lithium battery is included and installed. eufy rates battery life at up to five years under normal conditions; actual life varies.
Is this actually brand new?
Yes. It is factory sealed in full original eufy retail packaging. CamGuard Australia is an independent reseller, not an authorised eufy dealer; the 12-month warranty stated here is ours.