●Carbon Monoxide Detector50% OFF + FREE SHIPPING●1,000,000+ Users WorldwideTrustScore 4.9 · 3,780 Reviews●Real-Time CO · Gas · Temp · Humidity30-Day Money-Back Guarantee●Large Digital Display · No App NeededQuick Plug-In Setup ●Carbon Monoxide Detector50% OFF + FREE SHIPPING●1,000,000+ Users WorldwideTrustScore 4.9 · 3,780 Reviews●Real-Time CO · Gas · Temp · Humidity30-Day Money-Back Guarantee●Large Digital Display · No App NeededQuick Plug-In Setup

●Sentinel Detector — See What's In The AirFamilies · Older Relatives · Gas Boilers●No App · No Pairing · No MenusCO + Natural Gas Monitoring●Information Visible At A GlancePlug In · Check The Display · Peace Of Mind ●Sentinel Detector — See What's In The AirFamilies · Older Relatives · Gas Boilers●No App · No Pairing · No MenusCO + Natural Gas Monitoring●Information Visible At A GlancePlug In · Check The Display · Peace Of Mind

Contact information

Shipping Policy
Last updated: September 2026

Free Shipping on Every Order
We offer free shipping on all Sentinel Detector orders with no minimum purchase required.

Processing Time
All orders are processed within 1–2 business days. You will receive a shipping confirmation with tracking once your order ships.

Estimated Delivery Times
- United Kingdom: 6–12 business days
- United States: 7–12 business days
- Europe: 10–18 business days
- Australia & New Zealand: 12–20 business days
- International: 14–22 business days

Over 90% of our customers receive their order within 2 weeks of purchase.

Tracking
A tracking number will be provided once your order ships. Allow 24–48 hours for activation. If tracking hasn't updated after 5 business days, contact us at support@clickcraftventures.net before initiating any dispute.

Lost or Delayed Packages
Email support@clickcraftventures.net and we will investigate immediately. Confirmed lost orders receive a replacement or full refund.

Customs and Import Duties
International orders may be subject to import duties charged by your country's customs authority. These fees are the responsibility of the customer.

Questions? Email support@clickcraftventures.net

Support

Frequently Asked Questions

Does Sentinel show a visible CO reading on the screen?

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Yes. The design includes a front digital display showing the carbon monoxide sensor reading directly as a large number — rather than relying on a small status light. CO levels, gas detection, temperature and humidity are all visible at a glance on the same screen.

Does it monitor natural gas too?

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Yes. Sentinel monitors carbon monoxide and natural gas alongside temperature and humidity, bringing all four readings together on one clear display. Always follow the included instructions for placement around fuel-burning appliances.

Is Sentinel difficult to set up?

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No — it uses a simple plug-in design. Connect to the appropriate wall outlet and the display activates. There are no complicated menus to navigate, no app to download and no Bluetooth pairing required. Always follow the included placement instructions carefully.

Where should Sentinel be positioned?

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Always follow the manufacturer's placement instructions included with the device. Position the display where it can be checked easily throughout the day. Placement depends on the room layout and proximity to potential CO sources such as boilers, cookers or gas appliances.

Does a zero reading mean no CO anywhere in the home?

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No. A reading reflects what the device's sensor is detecting at its specific location. It should not be treated as confirmation that every part of the property is free from CO. Correct placement, appropriate alarm coverage and regular maintenance of fuel-burning appliances remain important independently of any reading shown.

What should I do if the alarm activates?

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If the alarm activates or CO exposure is suspected, leave the property immediately, move to fresh air, and contact emergency services. Do not re-enter the property until it has been confirmed safe by a qualified professional. Seek medical advice if you or anyone in the household feels unwell.

What is your return policy?

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Every order is backed by our 30-day money-back guarantee. If you're not satisfied for any reason, email support@clickcraftventures.net within 30 days of delivery and we'll arrange a full refund. We respond within 1–2 business days.

⚠️ Important safety note: Sentinel is not a certified replacement for a regulated carbon monoxide alarm meeting UK or local safety standards. Always follow manufacturer instructions for correct use, placement, testing and maintenance. Sentinel provides additional visible monitoring information and should be used alongside — not instead of — compliant alarms. If CO exposure is suspected, leave immediately and call emergency services.

Limited Time Promotion: 50% OFF + Free Shipping

Free Shipping · 30-Day Guarantee · Secure Checkout

⚡ Limited Time Promotion — 50% OFF + Free Shipping

50%
OFF

Sentinel Carbon Monoxide Detector

Sentinel · Carbon Monoxide Detector · Digital Display

See What's In The Air.
Instead Of Just Hoping Everything Is Fine.

Trusted by over 1 million households worldwide. Real-time CO display. CO + gas monitoring. Temperature and humidity. Simple plug-in setup. 30-day guarantee.

★★★★★ 4.9

3,780+ reviews · 30-day guarantee

Free Shipping · 30-Day Money-Back Guarantee · Secure Checkout