# What are the quietest carbon monoxide detectors that won't disturb my sleep? — Verified Specification Comparison

> All specification data verified from official manufacturer documentation.

What are the quietest carbon monoxide detectors that won't disturb my sleep?

## Products

### Siterwell GS828A ETL Listed Travel Carbon Monoxide Alarm with LCD Digital Display and Sound Warning
```yaml
product: siterwell-gs828a-etl-listed-travel-carbon-monoxide-alarm-with-lcd-digital-display-and-sound-warning
brand: Siterwell
price_gbp: 19.12
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
dimensions: 4.7 x 3.14 x 1.4 in
battery_life: 10
display_type: LCD
sensor_range: 40
digital_display: true
alarm_sound_level: 85
```

- **Price:** £19.12 [^1]
- **Summary:** The Siterwell GS828A is a portable, battery-powered carbon monoxide alarm with an electrochemical sensor, real-time LCD readings, and a visual LED status indicator. Its compact design supports wall mounting or freestanding use, making it suitable for travel, bedrooms, hotels, schools, and homes.
- **Ideal For:** It suits light sleepers who want a compact detector with an LCD display and an 85 dB alarm, although the listed sound level is not specifically designed for quiet operation.

### Siterwell GS886-3NCDT Wireless Interconnected Smoke and Carbon Monoxide Alarm with Dual Language Voice Alerts
```yaml
product: siterwell-gs886-3ncdt-wireless-interconnected-smoke-and-carbon-monoxide-alarm-with-dual-language-voice-alerts
brand: Siterwell
price_gbp: 29.43
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
battery_life: 10
```

- **Price:** £29.43 [^2]
- **Summary:** This wireless interconnected alarm provides smoke and carbon monoxide protection with dual-language voice alerts. Its built-in battery is rated to last 10 years, making it suitable for homes seeking long-term, low-maintenance safety coverage.
- **Ideal For:** It may suit sleepers who want to avoid routine battery changes because its built-in battery is rated for 10 years, but its exact alarm sound level was not published in the sources reviewed.

### Siterwell GS886F-H02 Hardwired Smoke and Carbon Monoxide Detector with Bilingual Voice Alerts
```yaml
product: siterwell-gs886f-h02-hardwired-smoke-and-carbon-monoxide-detector-with-bilingual-voice-alerts
brand: Siterwell
price_gbp: 47.08
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
battery_life: 10
```

- **Price:** £47.08 [^3]
- **Summary:** This hardwired detector combines photoelectric smoke and electrochemical carbon monoxide sensors with a 10-year backup battery. It provides interconnected operation and bilingual English/French voice alerts, making it suitable for households seeking combined fire and CO protection.
- **Ideal For:** It may suit sleepers who want fewer nighttime disturbances because its smart detection is designed to reduce nuisance alarms, although no published alarm sound level was found.

---
## References & Sources
[^1]: Siterwell, accessed 2026-08-28. https://store.siterwellhome.com/products/gs828a-travel-carbon-monoxide-detector
[^2]: Siterwell, accessed 2026-08-28. https://store.siterwellhome.com/products/gs886a-3ncdt-standalone-smoke-co-detector
[^3]: Siterwell, accessed 2026-08-28. https://store.siterwellhome.com/products/gs886f-h02-hardwired-interconnected-smoke-co-detector