Product Library / Sensors & Detectors
Research profile · last verified 2026-08-09SwitchBot Contact Sensor
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. |
| 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. |
| Apple Home | PartialPartial support — see the catch | 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. |
| SmartThings | Not checked yetWe have not researched this yet — this is not a claim about the product | SmartThings is not in this product's official third-party services list (Alexa, Google Assistant, IFTTT only); SwitchBot makes no explicit SmartThings statement for the Contact Sensor. |
| 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. |
? Not checked yet means we haven’t researched that ecosystem yet — it is a statement about our research, never a verdict on the product. A Setup Check can research it for you.
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
Listed capabilities are what we could establish from vendor documentation. An ability missing here is unestablished — not necessarily absent.
Subscription reality
✓ 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: Not established — we have not sourced this yet. It does not mean the product fails without the internet.
- 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 →
- [1] us.switch-bot.com/products/contact-sensor.js (fetched 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'. — structured-page-data, verified 2026-08-09Backs: 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'. — vendor-and-counterparty research, verified 2026-08-09Backs: Service status, Research status, Home Assistant compatibility, Protocols
- [3] us.switch-bot.com/products/contact-sensor (+ Shopify .json endpoint) — product live, priced $16.99/1-pack — vendor-page research, verified 2026-07-16Backs: Price
- [4] us.switch-bot.com/pages/switchbot-contact-sensor (official spec/detail page, spec accordion extracted from rendered DOM) — vendor-page research, verified 2026-07-16Backs: 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?') — vendor-support-article research, verified 2026-07-16Backs: Protocols, Required hub or bridge
- [6] us.switch-bot.com/collections/sensors — only one Contact Sensor SKU listed — vendor-catalog sweep, verified 2026-07-16Backs: Product identity
- [7] home-assistant.io/integrations/switchbot/ — Contact Sensor listed: open/closed, motion, battery; 'A SwitchBot Hub is not required for this integration' — integration-doc research, verified 2026-07-16Backs: 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. — vendor-page research, 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 — evidence read against sources this record already cites (BQ-193 bridge-vs-hub audit, R-3), verified 2026-08-19Backs: 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. — vendor-and-ecosystem-doc research (BQ-187 capabilities population, batch 8 — sensors + garage-access), verified 2026-08-20Backs: 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. Rungs walked per method note 69: (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 registered refusing host, and was not reachable this pass. — vendor policy-page research (BQ-192 security-support sweep, method note 69 rungs a–c), verified 2026-08-20Backs: Security-update support period
- [12] SmartHomeWorkflow record maintenance (BQ-250 securitySupport.region backfill) — internal-review of the document this record already cites, verified 2026-08-27
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.