5-in-1 Professional Indoor Air Quality Monitor Indoor Portable CO2
Monitor | Temperature | Formaldehyde Detector | Humidity TVOC | Air Quality Tester - Confined Space Clean Air Monitor(Pearl White)
at Amazon· sold by GZ-XUANYONGused
Go to AmazonWe are not ready to call this price.
We check at least every 12 hours and hold a day-by-day record of what this cost — 23 days of it so far. Calling a price high or low needs 7 of those days and at least one change, because a range needs two prices: this one has not moved since we started watching.
Every change we recorded
Every row is a price we saw change. We write one only when a price actually moves, so a gap here means the price held.
| When | Retailer | Price | Change |
|---|---|---|---|
| · 8d ago | Amazonused | $16.99 | first seen |
| · 22d ago | Amazon | $19.99 | first seen |
Tell me when it drops
A notification in this browser when the price falls. No email, no account, nothing to install.
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Price history
Tracking since September 18, 2026 · 23 days on record
The price has not changed since we started watching, so there is no line to draw yet. A chart appears the first time it moves.
Sales events
Next on the calendar: Black Friday, November 27. We keep checking this price through it and report here what it did.
Where to buy
- Held for
- 8d
- Their 23-day low
- $19.99
- Checked
- 8h ago
Prices checked at least every 12 hours. “Held for” is how long that retailer has been charging this price. A hidden price is one we cannot re-confirm recently enough to publish.
We earn a commission on purchases. It never affects our rankings.
What it is
4 attributes, in the retailer’s own words. We record the prices; these we only pass on.
- Color
- Pearl white
- Weight
- 0.48 pounds
- Dimensions
- 5 × 3 × 2 inches
- Model
- AK3
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$16.99
at Amazon · we earn a commission