Tongdy
Tongdy F2000TSP
$100
Tongdy F2000TSP Overview
The Tongdy F2000TSP is a mid-range CO2 monitor that tracks CO2, Temperature and Humidity. It uses a NDIR sensor — the technology we recommend for reliable CO2 readings — with a stated accuracy of ±50 ppm across a 0-5000 ppm measurement range. At $100, it is aimed at commercial buildings and HVAC integration.
In day-to-day use, the F2000TSP offers an onboard display, so you can read levels at a glance without opening an app, plus RS-485 and Modbus connectivity for logging trends and setting alerts, plus a stationary design (24V DC powered) best suited to continuous monitoring in a fixed location.
Best For
Full Specifications
| Price | $100 |
| Sensors | CO2, Temperature, Humidity |
| Sensor Type | NDIR |
| Connectivity | RS-485, Modbus |
| Display | Yes |
| Portable | No |
| Battery Life | 24V DC powered |
| CO2 Accuracy | ±50 ppm |
| CO2 Range | 0-5000 ppm |
Pros & Cons
Pros
- ✓True NDIR CO2 sensor (not an eCO2 estimate)
- ✓Built-in display for at-a-glance readings
Cons
- ✗No wireless connectivity for logging or alerts
- ✗Not designed for portable use
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Frequently Asked Questions
Is the Tongdy F2000TSP accurate?+
The Tongdy F2000TSP uses a NDIR sensor with a stated accuracy of ±50 ppm over a range of 0-5000 ppm. NDIR is the proven reference technology for consumer CO2 monitoring.
What does the Tongdy F2000TSP measure?+
It measures CO2, Temperature, Humidity. CO2 is the key metric for judging ventilation — levels below 800 ppm indicate well-ventilated air.
Does the Tongdy F2000TSP need WiFi?+
No. The Tongdy F2000TSP works standalone and shows readings on its built-in display.
Is the Tongdy F2000TSP worth it in 2026?+
At $100, the Tongdy F2000TSP is a solid choice for commercial buildings and HVAC integration. Its NDIR sensor puts it ahead of cheaper eCO2 estimators. Compare alternatives in our monitor comparison tool before buying.