Research profile · last verified 2026-08-09

SwitchBot Contact Sensor

Compiled by SmartHomeWorkflow Research · SwitchBot · Sensors & Detectors · ~$16.99 (price at time of research (2026-08-09) for the 1-pack, read from SwitchBot's own store data. The multi-packs carry NO bulk discount — 2-pack $33.98 and 4-pack $67.96 are exactly 2x and 4x the single — so buying more saves nothing but shipping. A 13% promotional code was live on the page and is deliberately not recorded as the price.)

Exactly which product this is^[6]

Model number: Not established
Generation: Not established
Region this page covers: Not established
Also sold or listed as: Not established

“Not established” means we have not sourced that detail yet — not that the product has no model number, generation or regional variant. We publish the gap rather than filling it.

Compatibility

Ecosystem	Support	The catch
Amazon Alexa	PartialPartial support — see the catch^[9]	Requires a SwitchBot hub. Open/close works; SwitchBot states Alexa does not support this device's light-level or motion features.In Amazon Alexa you also need: a Switchbot hub
Google Home	PartialPartial support — see the catch^[9]	Requires a SwitchBot hub. Open/close works; SwitchBot states Google Home does not support the light-level or motion features.In Google Home you also need: a Switchbot hub
Apple Home	PartialPartial support — see the catch^[14]	Only via Matter bridging through Hub 2, Hub 3, or Hub Mini Matter Enabled, and only door open/closed state is exposed. Hub 2 bridges max 8 sub-devices to Apple Home; Hub Mini Matter Enabled only 4.In Apple Home you also need: a Switchbot hub · an Apple home hub (a HomePod, HomePod mini, or Apple TV) — Apple Home’s rule for every Matter accessory. Source (read 2026-09-06)
SmartThings	PartialPartial support — see the catch^[17]	Requires a SwitchBot hub. Open/close works and can trigger SmartThings routines, and the battery level shows up; SwitchBot states the light-level and motion features are not available in the SmartThings app. Same shape as the Alexa and Google answers on this record.In SmartThings you also need: a Switchbot hub
Home Assistant	WorksWorks with this ecosystem^[2]	Via Home Assistant's SwitchBot Bluetooth integration: local, no hub or cloud needed; exposes open/close, motion state, and battery. Documented by Home Assistant, not by SwitchBot.In Home Assistant you also need: a Switchbot hub

Protocols: BLUETOOTH^[2][5][7]

Needs before it works: Works standalone over Bluetooth LE with the SwitchBot app (local open/close alerts; SwitchBot states Android users need a hub even for push alerts). A SwitchBot hub is required for remote notifications, Alexa/Google Assistant/IFTTT, and SwitchBot-ecosystem automations; Matter exposure specifically requires Hub 2, Hub 3, or Hub Mini Matter Enabled.^[4][5][7]

What it can do^[10]

You can tell it to

Not established — we could not confirm this from vendor documentation

It reports

Contact state
Motion detected

Whether each platform's automations and routines can use it — not just whether its app shows it.

What it does	Apple Home	Google Home	Alexa	SmartThings	Home Assistant
Contact state	? not stated	✓ routines can use it	✓ routines can use it	✓ routines can use it	✓ routines can use it
Motion detected	? not stated	✓ routines can use it	✓ routines can use it	✓ routines can use it	✓ routines can use it

Platform documentation: Amazon Alexa — automation engine ceiling (eight terms observed; residue inconclusive by refusal) (2026-09-01), Apple Home — Matter path (2026-09-04), Google Home — automation engine ceiling (2026-09-01), Home Assistant — automation engine ceiling (2026-08-29), SmartThings — automation engine ceiling (2026-09-01)

Listed capabilities are what we could establish from vendor documentation. An ability missing here is unestablished — not necessarily absent.

Subscription reality^[18]

✓ Works without a subscription: Yes.

Vendor account required: Not established — we have not sourced this yet.

No paid plan referenced on the official Contact Sensor pages; remote features need a hub purchase, not a subscription.

Maintenance reality^[4]

Batteries: AAA x2 — expect roughly 36 months per set
Works without the internet: Yes — the core function runs on the device or your home network. A vendor cloud may still be involved in remote access.^[16]
Official spec: 'Typically 3 years' under SwitchBot's stated daily trigger profile. Local Bluetooth operation works without cloud; remote alerts and voice assistants route through SwitchBot's hub cloud.
Security updates: SwitchBot states its security-update commitment for this model as a period rather than a date: 2 years of software update support, counted from launch — SwitchBot states the period as a rule but publishes an end date for only one product, which is not this one (the document this comes from names no country, so which markets it legally covers is not stated). That is a floor measured from a starting point the manufacturer sets — a launch or a purchase — rather than a fixed end date, so it cannot be placed on a calendar here. We record the commitment as the manufacturer states it, in our words, rather than converting it into a date it did not give. This is a published commitment, not a gap in our research.^[11]

The catch

Without a SwitchBot hub it is a Bluetooth-only sensor with phone-nearby alerts — remote notifications, voice assistants, and Matter all require buying a hub, and even then Alexa/Google never see its motion or light sensors.

Who it's for

Suits people already in the SwitchBot hub ecosystem who want inexpensive door/window state for automations, or Home Assistant users who can use it locally over Bluetooth without any hub.

Sources & method

Numbered sources below back the facts marked with the matching number above. This is a research profile: compiled from manufacturer documentation, certification registries, and published testing — we state facts, not verdicts, and we have not physically tested this unit. How we work →

Where these facts come from

No mark: Everything on this page without a mark comes from the people answerable for it: the manufacturer, the platform's own documentation, or a certification register. That is the standard we hold ourselves to.
Seller's spec sheet: This fact comes from a retailer's or a reviewer's specification listing instead of from the manufacturer. A few compatibility answers still rest on one, and we are replacing those with the maker's own word as we find it. The date is when we last checked, because these listings change without notice.
Someone's observation: This fact comes from an owner, a forum, or a community project — someone with the product in front of them rather than the company that makes it. Worth knowing, and not the same as the maker saying so.

Below is every source behind the facts on this page, numbered so you can trace any one of them. Each is quoted in the source's own words, with the date we last read it — we keep the wording exact rather than tidying it, so you can check what was actually said.

19 numbered sources· read them in the source's own words

[1] us.switch-bot.com/products/contact-sensor, read as structured product data 2026-08-09: variants 1-pack SKU 850007706388 at 1699 available true, 2-pack SKU 850007706388X2 at 3398 available true, 4-pack SKU 850007706388X4 at 6796 available true. Corroborated browser-rendered on us.switch-bot.com/products/contact-sensor: '$16.99', '1-Year Warranty', '30-Day Money-Back Guarantee'. — Read on the maker's own site, verified 2026-08-09
Backs: Price, Market availability
[2] www.home-assistant.io/integrations/switchbot (read 2026-08-09): supported-device list names 'Contact Sensor' under Sensors; 'The integration connects locally to the devices without going via the SwitchBot Cloud.' Vendor side, us.switch-bot.com/products/contact-sensor browser-rendered the same day: 'Remote Alerts & Voice Alarms: Sends phone notifications and triggers Alexa voice alarms if a door opens while you're away (SwitchBot Hub required)'; 'SwitchBot Ecosystem Integration ... (SwitchBot Hub required)'; detection range 'up to 16.4 ft (5m), 90° horizontally, and 55° vertically'. — Read on the maker's own site, verified 2026-08-09
Backs: Service status, Research status, Home Assistant compatibility, Protocols
[3] us.switch-bot.com/products/contact-sensor (and its structured store data) — product live, priced $16.99/1-pack — Read on the maker's own site, verified 2026-07-16
Backs: Price
[4] us.switch-bot.com/pages/switchbot-contact-sensor (official spec/detail page, spec accordion extracted from rendered DOM) — Read on the maker's own site, verified 2026-07-16
Backs: Maintenance, Required hub or bridge
[5] support.switch-bot.com/hc/en-us/articles/13282638111127 ('Which SwitchBot Devices Can Be Added to Apple Home As Sub-devices via Matter?') — Read on the maker's own site, verified 2026-07-16
Backs: Protocols, Required hub or bridge
[6] us.switch-bot.com/collections/sensors — only one Contact Sensor SKU listed — Read on the maker's own site, verified 2026-07-16
Backs: Product identity
[7] home-assistant.io/integrations/switchbot/ — Contact Sensor listed: open/closed, motion, battery; 'A SwitchBot Hub is not required for this integration' — Read the platform's own documentation, verified 2026-07-16
Backs: Required hub or bridge, Protocols
[8] SwitchBot US Contact Sensor page, re-read 2026-08-18 — no sentence about hub requirement for remote access, Bluetooth-only operation, or internet-outage behaviour. — Read on the maker's own site, verified 2026-08-18
[9] SwitchBot US Contact Sensor product and spec pages, plus SwitchBot support article 13282638111127 ('Which SwitchBot Devices Can Be Added to Apple Home As Sub-devices via Matter?') — both already cited on this record — Recorded from our own earlier read, verified 2026-08-19
Backs: Amazon Alexa compatibility, Google Home compatibility
[10] Home Assistant's SwitchBot integration documentation, read 2026-08-20, which lists "Contact Sensor (WoContact)" with open or closed state, motion detection state and battery level. Corroborated by SwitchBot's own storefront copy the same day: the sensor "Works with other SwitchBot devices to automate actions, like turning off air purifiers when windows open", with a SwitchBot Hub required for remote alerts and device integrations. — Read on the maker's own site, verified 2026-08-20
Backs: Capabilities
[11] SwitchBot's own Vulnerability Disclosure Policy (www.switch-bot.com/pages/switchbot-vulnerability-disclosure-policy), read in full 2026-08-20. The commitment, verbatim: "We will deliver an updated experience for you on a regular basis including updated security patches. The period of software update support is 2 years, see the table below for details." The table it points to contains exactly ONE row — "SwitchBot Floor Cleaning Robot S10 | 2023/10/16 | 2025/12/31" — under the headings "Product Name", "Launch Date" and "End date of software update support". The same policy publishes remediation targets rather than a support horizon: "critical and high-risk vulnerabilities will be fixed within three working days, high-risk vulnerabilities within 0.5 months, medium-risk vulnerabilities within one month, and low-risk vulnerabilities within four months", with reports to security@switch-bot.com. Routes tried, in the standing order: (a) no SwitchBot regulatory-declaration library (UK PSTI / EU CRA) could be located — a first-party search surfaced only per-product FCC "Safety and Compliance Information" articles, which carry no support period; (b) answered by this policy page; (c) the product's own page sits on us.switch-bot.com, a site registered as refusing us, and was not reachable that day. — Read on the maker's own site, verified 2026-08-20
Backs: Security-update support period
[12] SmartHomeWorkflow record maintenance: the catalogue-wide pass that filled in which region each security-support statement covers, verified 2026-08-27
[13] https://us.switch-bot.com/pages/switchbot-contact-sensor (read 2026-09-09), Product details: 'Compatibility: Android 5.0+, iOS 14.0+' and 'Power Input: Battery: AAA x 2', 'Battery Life: Typically 3 years, triggered 80 times by door open, 80 times by door close, 40 times by button'. Both are vendor specifications, not setup advice. ⊕ The same page's '*SwitchBot Hub Mini only support 2.4GHz Wi-Fi' is about a DIFFERENT product's radio and was not read onto this record, which has no Wi-Fi radio of its own. — Read on the maker's own site, verified 2026-09-09
Backs: App platforms, Power source
[14] SwitchBot's own help-centre article 'Which SwitchBot Devices Can Be Added to Apple Home As Sub-devices via Matter?', read 2026-09-10 in a rendering browser because https://support.switch-bot.com/hc/en-us/articles/13282638111127 would not open to a simple read that day. The table row, verbatim: 'Contact Sensor Available door is open/door is closed'. The article names SwitchBot Hub 2, Hub Mini Matter Enabled and Hub 3 among its related products, and states 'The number of sub-devices that can be synced to Apple Home App via Hub 2 is 8 in total'. — Read the original source directly, verified 2026-09-10
Backs: Apple Home compatibility
[15] the record's own customer-facing prose fields as they stood before 2026-09-12 (no new external read), verified 2026-09-12
[16] SwitchBot's own product page for the Contact Sensor, re-read on 12 September 2026 — 'Security Monitoring: Detects door/window openings, enhancing safety for elderly, children, and pets. With the built-in light sensor, it will automatically trigger the Switchbot Bot to turn on the light when someone moves when the environment goes dark.'; 'Detects People Leaving or Entering the Home: Recognizes when you leave or enter home, automating appliance control via the SwitchBot app (SwitchBot Hub Mini needed).'; 'Remote Alerts & Voice Alarms: Sends phone notifications and triggers Alexa voice alarms if a door opens while you're away (SwitchBot Hub required).'; 'SwitchBot Ecosystem Integration: Works with other SwitchBot devices to automate actions, like turning off air purifiers when windows open (SwitchBot Hub required).' Read on www.switch-bot.com, SwitchBot's global store; us.switch-bot.com, the host this record's older entries cite, has been turning our reader away and carries the same catalogue. Also re-read the same day: www.home-assistant.io/integrations/switchbot/ (quoted in the note, used for transport only) and www.switch-bot.com/pages/switchbot-vulnerability-disclosure-policy. — Read on the maker's own site, verified 2026-09-12
Backs: Works without the internet
[17] SwitchBot's own help centre, the Contact Sensor article 'Why There Is No Motion Detection and Light Sensing Function for SwitchBot Contact Sensor on Smartthings App?', filed under the help centre's Contact Sensor category and read 2026-09-15. Verbatim, the article in full: 'Last Update: 2023 Mar 31 Related Products: SwitchBot Contact Sensor The SmartThings App can only detect the opening and closing of doors or windows through SwitchBot Contact Sensor. Door open/close and battery level can be set as routine conditions. However, the light sensor and motion detection functions are currently not available.' SwitchBot's help-centre metadata dates the article's last edit 2023-05-31 and its last update 2024-08-29. — Read on the maker's own site, verified 2026-09-15
Backs: SmartThings compatibility
Checked 2026-09-15. This page no longer lets us re-check it automatically, so that date is where this fact stands.
[18] SwitchBot's own Camera Cloud Storage Service User Agreement, whose definitions limit the plan to the camera and doorbell series, and SwitchBot's store listing for the Contact Sensor at $16.99 — Read on the maker's own site, verified 2026-09-17
Backs: Subscription
[19] this record's own lifecycle note as it stood before 2026-09-19 (no new external read): its wording was rewritten so it reads in plain language. No fact, date, source or value changed, and the earlier wording is kept on this record., verified 2026-09-19

Compatibility and lifecycle information reflects the last-verified date above and can change without notice (firmware updates, cloud-service changes, discontinuations). It is provided as-is, for information — verify with the manufacturer before purchasing. Spot an error? Tell us and we'll fix it. Full terms: Terms of Service.

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