Kidde
Kidde Nighthawk CO2 Monitor
$55
Kidde Nighthawk CO2 Monitor Overview
The Kidde Nighthawk CO2 Monitor is a budget CO2 monitor that tracks CO2. It uses a Electrochemical sensor — the technology we recommend for reliable CO2 readings — with a stated accuracy of ±30 ppm across a 0-999 ppm measurement range. At $55, it is aimed at home use, budget-conscious buyers and safety monitoring.
In day-to-day use, the Nighthawk CO2 Monitor offers an onboard display, so you can read levels at a glance without opening an app, plus a stationary design (AC powered + battery backup) best suited to continuous monitoring in a fixed location.
Best For
Full Specifications
| Price | $55 |
| Sensors | CO2 |
| Sensor Type | Electrochemical |
| Connectivity | |
| Display | Yes |
| Portable | No |
| Battery Life | AC powered + battery backup |
| CO2 Accuracy | ±30 ppm |
| CO2 Range | 0-999 ppm |
Pros & Cons
Pros
- ✓Strong stated accuracy of ±30 ppm
- ✓Built-in display for at-a-glance readings
- ✓Accessible price point for a real CO2 sensor
Cons
- ✗No wireless connectivity for logging or alerts
- ✗Not designed for portable use
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Frequently Asked Questions
Is the Kidde Nighthawk CO2 Monitor accurate?+
The Kidde Nighthawk CO2 Monitor uses a Electrochemical sensor with a stated accuracy of ±30 ppm over a range of 0-999 ppm.
What does the Kidde Nighthawk CO2 Monitor measure?+
It measures CO2. CO2 is the key metric for judging ventilation — levels below 800 ppm indicate well-ventilated air.
Does the Kidde Nighthawk CO2 Monitor need WiFi?+
No. The Kidde Nighthawk CO2 Monitor works standalone and shows readings on its built-in display.
Is the Kidde Nighthawk CO2 Monitor worth it in 2026?+
At $55, the Kidde Nighthawk CO2 Monitor is a solid choice for home use, budget-conscious buyers and safety monitoring. Compare alternatives in our monitor comparison tool before buying.