Wisualarm Wireless Carbon Monoxide Alarm | 10-Year Sealed Battery | LCD CO + Temp + Humidity Display
Wisualarm Wireless Carbon Monoxide Alarm | 10-Year Sealed Battery | LCD CO + Temp + Humidity Display
Wireless Interconnected 10-Year Sealed Battery CO + Temp + Humidity LCD
The Wisualarm DHI-HY-GC30A-R8 is a wireless interconnected carbon monoxide alarm with a 10-year sealed lithium battery and a multi-function LCD display that shows live CO concentration, ambient temperature and relative humidity — making it the most information-rich CO alarm in the Wisualarm battery-powered range. Like the GC20D-R8, it uses a high-performance electrochemical CO sensor and communicates wirelessly at 868 MHz with up to 24 other WisuLink-compatible devices, so triggering any alarm in the network sounds all of them simultaneously. The added temperature and humidity display makes it a genuinely useful everyday device, not just a passive safety tool waiting in the background, while the sealed battery eliminates 10 years of battery maintenance and the risk of occupant tampering.
💡 What the LCD displays:
In standby (normal operation): The screen alternates between showing the current ambient temperature and relative humidity — giving occupants a useful at-a-glance environmental readout without any additional sensor hardware.
During a CO alarm event: The display switches to show the live CO concentration in parts per million (ppm), enabling occupants and emergency responders to assess the severity of the exposure in real time rather than just knowing the alarm has triggered.
Peak CO memory: The alarm records and displays the highest CO concentration detected, which persists after the alarm clears — useful for engineers investigating the cause of an alarm event.
End-of-life notification: The display provides a clear notification when the unit is approaching the end of its 10-year service life, ensuring timely replacement.
Key Features
🏠 UK Legal Requirement — Smoke and Carbon Monoxide Alarm (Amendment) Regulations 2022: Private sector landlords in England must install a CO alarm in every room with a fixed combustion appliance (excluding gas cookers). Social landlords have been subject to the same requirement since 1 February 2023. The DHI-HY-GC30A-R8, certified to EN 50291-1:2018, meets the technical standard required for compliance. For Scottish properties subject to the Housing (Scotland) Act 2006 requirements — which mandate interlinked alarms — the wireless interconnect capability of this model makes it particularly well suited compared to standalone alternatives.
Where to Install
- Every room with a fixed combustion appliance — gas or oil boiler, gas fire, log burner, open fireplace, wood-burning stove or pellet stove. The alarm should be within 1–3 metres of the appliance on the same level.
- Each sleeping level of the home — CO is most dangerous at night when occupants cannot self-evacuate. An alarm on each sleeping floor, linked wirelessly to units near combustion appliances, maximises the warning time available.
- Mounting height — CO disperses approximately evenly in air. EN 50292 recommends wall mounting between 1.5m and 2.1m above the floor, or ceiling mounting per manufacturer instructions (minimum 300mm from walls).
- Avoid — bathrooms, directly above cookers, near open windows or air vents (dilution reduces sensitivity), areas of direct sunlight, garages or car parks (vehicle exhaust will trigger false alarms).
Wisualarm CO Alarm Comparison
| Feature | DHI-HY-GC20D Standalone |
DHI-HY-GC20D-R8 Wireless Interconnected |
DHI-HY-GC30A-R8 ★ This product |
|---|---|---|---|
| Wireless interconnection | ✗ No | ✓ Up to 24 devices | ✓ Up to 24 devices |
| RF frequency | — | 868 MHz | 868 MHz |
| LCD — CO concentration | ✓ Yes | ✓ Yes | ✓ Yes |
| LCD — Temperature display | ✗ No | ✗ No | ✓ Yes |
| LCD — Humidity display | ✗ No | ✗ No | ✓ Yes |
| Battery type | CR123A (sealed) | CR123A (sealed) | CR7450 (sealed, larger) |
| Battery life | 10 years | 10 years | 10 years |
| App alerts (with Gateway) | ✗ No | ✓ Optional | ✓ Optional |
| EN 50291-1:2018 | ✓ Certified | ✓ Certified | ✓ Certified |
| Best for | Single-room compliance, simple install | Multi-room coverage, basic interconnect | Multi-room coverage + environmental monitoring at each alarm location |
⚠️ Carbon monoxide — act immediately if the alarm sounds: CO is colourless and odourless. If your alarm activates: open windows and doors, evacuate the building immediately, do not re-enter until declared safe. Call the Gas Emergency line: 0800 111 999. Do not assume a CO alarm is a false alarm without investigation by a Gas Safe registered engineer.
Technical Specifications
| Specification | Detail |
|---|---|
| Product Identity | |
| Model number | DHI-HY-GC30A-R8 |
| Brand | Wisualarm (by Dahua) |
| Variant | Wireless interconnected (WisuLink) |
| Detection | |
| Sensor type | Electrochemical |
| Gas detected | Carbon monoxide (CO) |
| Sensor life | 10 years |
| Display | |
| Display type | LCD |
| Standby display | Ambient temperature and relative humidity (alternating) |
| Alarm display | Live CO concentration in ppm |
| Peak CO memory | Yes — records highest concentration detected |
| End-of-life notification | Yes |
| Alarm Output | |
| Alarm volume | Over 85dB(A) at 3 metres |
| Alarm mode | Visual (3 × LED indicators) and audible |
| Silence function | Supported (single button) |
| Low battery warning | Yes |
| Wireless Communication | |
| Communication protocol | WisuLink RF mesh (868 MHz) |
| Max. interconnected devices | 24 (including smoke, heat and CO alarms) |
| App notifications | Optional — requires DHI-HY-GW01A Gateway |
| Power | |
| Power source | DC 3V CR7450 lithium battery (non-replaceable, sealed) |
| Battery life | 10 years |
| Environmental | |
| Usage environment | Indoor use only |
| Installation method | Wall mount |
| Certifications & Standards | |
| Standard compliance | EN 50291-1 |
| Certifications | TÜV, CE |
FAQs
What is the difference between this and the DHI-HY-GC20D-R8?
Both are 10-year sealed battery wireless interconnected CO alarms with LCD displays and EN 50291-1:2018 certification. The GC30A-R8 (this product) adds ambient temperature and humidity display in standby mode — the LCD alternates between temp and humidity readings when no CO is detected, rather than remaining off. It also uses a larger CR7450 sealed battery cell (compared to CR123A in the GC20D-R8) to sustain the additional display functionality over the 10-year life. If temperature and humidity monitoring at the alarm location is useful for your application — utility rooms, plant rooms, or properties where damp is a concern alongside CO risk — the GC30A-R8 provides that without any additional sensor hardware. If a standard CO-only wireless interconnected alarm is sufficient, the GC20D-R8 is the more compact option.
Can this alarm be used as a standalone unit without interconnecting other devices?
Yes. While the GC30A-R8 is designed to work within a WisuLink wireless mesh, it functions perfectly as a standalone CO alarm in a single-room installation. Wireless interconnection is available but not required — the alarm will detect CO and sound its own sounder regardless of whether other devices are paired. Pairing additional devices is done simply by following the linking procedure in the user manual; no installer tools or app are required for the interconnection itself.
Does this alarm comply with the Smoke and Carbon Monoxide Alarm Regulations 2022?
Yes. The DHI-HY-GC30A-R8 is certified to EN 50291-1, the standard specified in the statutory guidance for the Smoke and Carbon Monoxide Alarm (Amendment) Regulations 2022 in England. It is suitable for installation in rented properties to satisfy the legal requirement for a CO alarm in rooms with fixed combustion appliances. Its wireless interconnect capability also makes it appropriate for Scottish properties subject to the Housing (Scotland) Act 2006 interlinked alarm requirements.
How do I receive smartphone alerts when the alarm triggers?
The GC30A-R8 does not connect directly to Wi-Fi or the internet. Smartphone notifications require the optional Wisualarm Internet Gateway (DHI-HY-GW01A), which connects to your router by Ethernet or Wi-Fi and bridges the WisuLink 868 MHz mesh to the internet. Once the Gateway is added to the network, the free Wisualarm app on your smartphone will receive push notifications whenever any linked device — including this CO alarm — triggers. The Gateway is sold separately and is a single purchase covering all linked devices in the network.
Original: $51.29
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Wisualarm Wireless Carbon Monoxide Alarm | 10-Year Sealed Battery | LCD CO + Temp + Humidity Display
Wireless Interconnected 10-Year Sealed Battery CO + Temp + Humidity LCD
The Wisualarm DHI-HY-GC30A-R8 is a wireless interconnected carbon monoxide alarm with a 10-year sealed lithium battery and a multi-function LCD display that shows live CO concentration, ambient temperature and relative humidity — making it the most information-rich CO alarm in the Wisualarm battery-powered range. Like the GC20D-R8, it uses a high-performance electrochemical CO sensor and communicates wirelessly at 868 MHz with up to 24 other WisuLink-compatible devices, so triggering any alarm in the network sounds all of them simultaneously. The added temperature and humidity display makes it a genuinely useful everyday device, not just a passive safety tool waiting in the background, while the sealed battery eliminates 10 years of battery maintenance and the risk of occupant tampering.
💡 What the LCD displays:
In standby (normal operation): The screen alternates between showing the current ambient temperature and relative humidity — giving occupants a useful at-a-glance environmental readout without any additional sensor hardware.
During a CO alarm event: The display switches to show the live CO concentration in parts per million (ppm), enabling occupants and emergency responders to assess the severity of the exposure in real time rather than just knowing the alarm has triggered.
Peak CO memory: The alarm records and displays the highest CO concentration detected, which persists after the alarm clears — useful for engineers investigating the cause of an alarm event.
End-of-life notification: The display provides a clear notification when the unit is approaching the end of its 10-year service life, ensuring timely replacement.
Key Features
🏠 UK Legal Requirement — Smoke and Carbon Monoxide Alarm (Amendment) Regulations 2022: Private sector landlords in England must install a CO alarm in every room with a fixed combustion appliance (excluding gas cookers). Social landlords have been subject to the same requirement since 1 February 2023. The DHI-HY-GC30A-R8, certified to EN 50291-1:2018, meets the technical standard required for compliance. For Scottish properties subject to the Housing (Scotland) Act 2006 requirements — which mandate interlinked alarms — the wireless interconnect capability of this model makes it particularly well suited compared to standalone alternatives.
Where to Install
- Every room with a fixed combustion appliance — gas or oil boiler, gas fire, log burner, open fireplace, wood-burning stove or pellet stove. The alarm should be within 1–3 metres of the appliance on the same level.
- Each sleeping level of the home — CO is most dangerous at night when occupants cannot self-evacuate. An alarm on each sleeping floor, linked wirelessly to units near combustion appliances, maximises the warning time available.
- Mounting height — CO disperses approximately evenly in air. EN 50292 recommends wall mounting between 1.5m and 2.1m above the floor, or ceiling mounting per manufacturer instructions (minimum 300mm from walls).
- Avoid — bathrooms, directly above cookers, near open windows or air vents (dilution reduces sensitivity), areas of direct sunlight, garages or car parks (vehicle exhaust will trigger false alarms).
Wisualarm CO Alarm Comparison
| Feature | DHI-HY-GC20D Standalone |
DHI-HY-GC20D-R8 Wireless Interconnected |
DHI-HY-GC30A-R8 ★ This product |
|---|---|---|---|
| Wireless interconnection | ✗ No | ✓ Up to 24 devices | ✓ Up to 24 devices |
| RF frequency | — | 868 MHz | 868 MHz |
| LCD — CO concentration | ✓ Yes | ✓ Yes | ✓ Yes |
| LCD — Temperature display | ✗ No | ✗ No | ✓ Yes |
| LCD — Humidity display | ✗ No | ✗ No | ✓ Yes |
| Battery type | CR123A (sealed) | CR123A (sealed) | CR7450 (sealed, larger) |
| Battery life | 10 years | 10 years | 10 years |
| App alerts (with Gateway) | ✗ No | ✓ Optional | ✓ Optional |
| EN 50291-1:2018 | ✓ Certified | ✓ Certified | ✓ Certified |
| Best for | Single-room compliance, simple install | Multi-room coverage, basic interconnect | Multi-room coverage + environmental monitoring at each alarm location |
⚠️ Carbon monoxide — act immediately if the alarm sounds: CO is colourless and odourless. If your alarm activates: open windows and doors, evacuate the building immediately, do not re-enter until declared safe. Call the Gas Emergency line: 0800 111 999. Do not assume a CO alarm is a false alarm without investigation by a Gas Safe registered engineer.
Technical Specifications
| Specification | Detail |
|---|---|
| Product Identity | |
| Model number | DHI-HY-GC30A-R8 |
| Brand | Wisualarm (by Dahua) |
| Variant | Wireless interconnected (WisuLink) |
| Detection | |
| Sensor type | Electrochemical |
| Gas detected | Carbon monoxide (CO) |
| Sensor life | 10 years |
| Display | |
| Display type | LCD |
| Standby display | Ambient temperature and relative humidity (alternating) |
| Alarm display | Live CO concentration in ppm |
| Peak CO memory | Yes — records highest concentration detected |
| End-of-life notification | Yes |
| Alarm Output | |
| Alarm volume | Over 85dB(A) at 3 metres |
| Alarm mode | Visual (3 × LED indicators) and audible |
| Silence function | Supported (single button) |
| Low battery warning | Yes |
| Wireless Communication | |
| Communication protocol | WisuLink RF mesh (868 MHz) |
| Max. interconnected devices | 24 (including smoke, heat and CO alarms) |
| App notifications | Optional — requires DHI-HY-GW01A Gateway |
| Power | |
| Power source | DC 3V CR7450 lithium battery (non-replaceable, sealed) |
| Battery life | 10 years |
| Environmental | |
| Usage environment | Indoor use only |
| Installation method | Wall mount |
| Certifications & Standards | |
| Standard compliance | EN 50291-1 |
| Certifications | TÜV, CE |
FAQs
What is the difference between this and the DHI-HY-GC20D-R8?
Both are 10-year sealed battery wireless interconnected CO alarms with LCD displays and EN 50291-1:2018 certification. The GC30A-R8 (this product) adds ambient temperature and humidity display in standby mode — the LCD alternates between temp and humidity readings when no CO is detected, rather than remaining off. It also uses a larger CR7450 sealed battery cell (compared to CR123A in the GC20D-R8) to sustain the additional display functionality over the 10-year life. If temperature and humidity monitoring at the alarm location is useful for your application — utility rooms, plant rooms, or properties where damp is a concern alongside CO risk — the GC30A-R8 provides that without any additional sensor hardware. If a standard CO-only wireless interconnected alarm is sufficient, the GC20D-R8 is the more compact option.
Can this alarm be used as a standalone unit without interconnecting other devices?
Yes. While the GC30A-R8 is designed to work within a WisuLink wireless mesh, it functions perfectly as a standalone CO alarm in a single-room installation. Wireless interconnection is available but not required — the alarm will detect CO and sound its own sounder regardless of whether other devices are paired. Pairing additional devices is done simply by following the linking procedure in the user manual; no installer tools or app are required for the interconnection itself.
Does this alarm comply with the Smoke and Carbon Monoxide Alarm Regulations 2022?
Yes. The DHI-HY-GC30A-R8 is certified to EN 50291-1, the standard specified in the statutory guidance for the Smoke and Carbon Monoxide Alarm (Amendment) Regulations 2022 in England. It is suitable for installation in rented properties to satisfy the legal requirement for a CO alarm in rooms with fixed combustion appliances. Its wireless interconnect capability also makes it appropriate for Scottish properties subject to the Housing (Scotland) Act 2006 interlinked alarm requirements.
How do I receive smartphone alerts when the alarm triggers?
The GC30A-R8 does not connect directly to Wi-Fi or the internet. Smartphone notifications require the optional Wisualarm Internet Gateway (DHI-HY-GW01A), which connects to your router by Ethernet or Wi-Fi and bridges the WisuLink 868 MHz mesh to the internet. Once the Gateway is added to the network, the free Wisualarm app on your smartphone will receive push notifications whenever any linked device — including this CO alarm — triggers. The Gateway is sold separately and is a single purchase covering all linked devices in the network.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
Wireless Interconnected 10-Year Sealed Battery CO + Temp + Humidity LCD
The Wisualarm DHI-HY-GC30A-R8 is a wireless interconnected carbon monoxide alarm with a 10-year sealed lithium battery and a multi-function LCD display that shows live CO concentration, ambient temperature and relative humidity — making it the most information-rich CO alarm in the Wisualarm battery-powered range. Like the GC20D-R8, it uses a high-performance electrochemical CO sensor and communicates wirelessly at 868 MHz with up to 24 other WisuLink-compatible devices, so triggering any alarm in the network sounds all of them simultaneously. The added temperature and humidity display makes it a genuinely useful everyday device, not just a passive safety tool waiting in the background, while the sealed battery eliminates 10 years of battery maintenance and the risk of occupant tampering.
💡 What the LCD displays:
In standby (normal operation): The screen alternates between showing the current ambient temperature and relative humidity — giving occupants a useful at-a-glance environmental readout without any additional sensor hardware.
During a CO alarm event: The display switches to show the live CO concentration in parts per million (ppm), enabling occupants and emergency responders to assess the severity of the exposure in real time rather than just knowing the alarm has triggered.
Peak CO memory: The alarm records and displays the highest CO concentration detected, which persists after the alarm clears — useful for engineers investigating the cause of an alarm event.
End-of-life notification: The display provides a clear notification when the unit is approaching the end of its 10-year service life, ensuring timely replacement.
Key Features
🏠 UK Legal Requirement — Smoke and Carbon Monoxide Alarm (Amendment) Regulations 2022: Private sector landlords in England must install a CO alarm in every room with a fixed combustion appliance (excluding gas cookers). Social landlords have been subject to the same requirement since 1 February 2023. The DHI-HY-GC30A-R8, certified to EN 50291-1:2018, meets the technical standard required for compliance. For Scottish properties subject to the Housing (Scotland) Act 2006 requirements — which mandate interlinked alarms — the wireless interconnect capability of this model makes it particularly well suited compared to standalone alternatives.
Where to Install
- Every room with a fixed combustion appliance — gas or oil boiler, gas fire, log burner, open fireplace, wood-burning stove or pellet stove. The alarm should be within 1–3 metres of the appliance on the same level.
- Each sleeping level of the home — CO is most dangerous at night when occupants cannot self-evacuate. An alarm on each sleeping floor, linked wirelessly to units near combustion appliances, maximises the warning time available.
- Mounting height — CO disperses approximately evenly in air. EN 50292 recommends wall mounting between 1.5m and 2.1m above the floor, or ceiling mounting per manufacturer instructions (minimum 300mm from walls).
- Avoid — bathrooms, directly above cookers, near open windows or air vents (dilution reduces sensitivity), areas of direct sunlight, garages or car parks (vehicle exhaust will trigger false alarms).
Wisualarm CO Alarm Comparison
| Feature | DHI-HY-GC20D Standalone |
DHI-HY-GC20D-R8 Wireless Interconnected |
DHI-HY-GC30A-R8 ★ This product |
|---|---|---|---|
| Wireless interconnection | ✗ No | ✓ Up to 24 devices | ✓ Up to 24 devices |
| RF frequency | — | 868 MHz | 868 MHz |
| LCD — CO concentration | ✓ Yes | ✓ Yes | ✓ Yes |
| LCD — Temperature display | ✗ No | ✗ No | ✓ Yes |
| LCD — Humidity display | ✗ No | ✗ No | ✓ Yes |
| Battery type | CR123A (sealed) | CR123A (sealed) | CR7450 (sealed, larger) |
| Battery life | 10 years | 10 years | 10 years |
| App alerts (with Gateway) | ✗ No | ✓ Optional | ✓ Optional |
| EN 50291-1:2018 | ✓ Certified | ✓ Certified | ✓ Certified |
| Best for | Single-room compliance, simple install | Multi-room coverage, basic interconnect | Multi-room coverage + environmental monitoring at each alarm location |
⚠️ Carbon monoxide — act immediately if the alarm sounds: CO is colourless and odourless. If your alarm activates: open windows and doors, evacuate the building immediately, do not re-enter until declared safe. Call the Gas Emergency line: 0800 111 999. Do not assume a CO alarm is a false alarm without investigation by a Gas Safe registered engineer.
Technical Specifications
| Specification | Detail |
|---|---|
| Product Identity | |
| Model number | DHI-HY-GC30A-R8 |
| Brand | Wisualarm (by Dahua) |
| Variant | Wireless interconnected (WisuLink) |
| Detection | |
| Sensor type | Electrochemical |
| Gas detected | Carbon monoxide (CO) |
| Sensor life | 10 years |
| Display | |
| Display type | LCD |
| Standby display | Ambient temperature and relative humidity (alternating) |
| Alarm display | Live CO concentration in ppm |
| Peak CO memory | Yes — records highest concentration detected |
| End-of-life notification | Yes |
| Alarm Output | |
| Alarm volume | Over 85dB(A) at 3 metres |
| Alarm mode | Visual (3 × LED indicators) and audible |
| Silence function | Supported (single button) |
| Low battery warning | Yes |
| Wireless Communication | |
| Communication protocol | WisuLink RF mesh (868 MHz) |
| Max. interconnected devices | 24 (including smoke, heat and CO alarms) |
| App notifications | Optional — requires DHI-HY-GW01A Gateway |
| Power | |
| Power source | DC 3V CR7450 lithium battery (non-replaceable, sealed) |
| Battery life | 10 years |
| Environmental | |
| Usage environment | Indoor use only |
| Installation method | Wall mount |
| Certifications & Standards | |
| Standard compliance | EN 50291-1 |
| Certifications | TÜV, CE |
FAQs
What is the difference between this and the DHI-HY-GC20D-R8?
Both are 10-year sealed battery wireless interconnected CO alarms with LCD displays and EN 50291-1:2018 certification. The GC30A-R8 (this product) adds ambient temperature and humidity display in standby mode — the LCD alternates between temp and humidity readings when no CO is detected, rather than remaining off. It also uses a larger CR7450 sealed battery cell (compared to CR123A in the GC20D-R8) to sustain the additional display functionality over the 10-year life. If temperature and humidity monitoring at the alarm location is useful for your application — utility rooms, plant rooms, or properties where damp is a concern alongside CO risk — the GC30A-R8 provides that without any additional sensor hardware. If a standard CO-only wireless interconnected alarm is sufficient, the GC20D-R8 is the more compact option.
Can this alarm be used as a standalone unit without interconnecting other devices?
Yes. While the GC30A-R8 is designed to work within a WisuLink wireless mesh, it functions perfectly as a standalone CO alarm in a single-room installation. Wireless interconnection is available but not required — the alarm will detect CO and sound its own sounder regardless of whether other devices are paired. Pairing additional devices is done simply by following the linking procedure in the user manual; no installer tools or app are required for the interconnection itself.
Does this alarm comply with the Smoke and Carbon Monoxide Alarm Regulations 2022?
Yes. The DHI-HY-GC30A-R8 is certified to EN 50291-1, the standard specified in the statutory guidance for the Smoke and Carbon Monoxide Alarm (Amendment) Regulations 2022 in England. It is suitable for installation in rented properties to satisfy the legal requirement for a CO alarm in rooms with fixed combustion appliances. Its wireless interconnect capability also makes it appropriate for Scottish properties subject to the Housing (Scotland) Act 2006 interlinked alarm requirements.
How do I receive smartphone alerts when the alarm triggers?
The GC30A-R8 does not connect directly to Wi-Fi or the internet. Smartphone notifications require the optional Wisualarm Internet Gateway (DHI-HY-GW01A), which connects to your router by Ethernet or Wi-Fi and bridges the WisuLink 868 MHz mesh to the internet. Once the Gateway is added to the network, the free Wisualarm app on your smartphone will receive push notifications whenever any linked device — including this CO alarm — triggers. The Gateway is sold separately and is a single purchase covering all linked devices in the network.
