Computers › Electronic components
1/2pcs Winsen MH-Z19C CO2 Sensor Carbon Dioxide Gas Sensor Module CO2 Monitor
Quick answer
Is $21.31 a good price for 1/2pcs Winsen MH-Z19C CO2 Sensor Carbon Dioxide Gas Sensor Module…?
It is the usual price, not a deal: $21.31 is in line with the typical price of $21.31 that DipScout measured over the last 14 days. It is the lowest in 21 days, but it has held this price since Nov 2, 2026.
The drop of Nov 4 (to $21.31) hasn't been re-checked in the last 48 hours. Check the price on AliExpress before buying.
$21.31
Today it costs $21.31 on AliExpress. Since Oct 22, 2026, when we started tracking it, it ranged from $21.31 to $25.37. It's the lowest price in 21 days, but it has been at this value since Nov 2, 2026; by our price history that is already the normal price, not a sale.
No drop compared with what we observed over the last 14 days. The store advertises "was $50.75", but that is the store's own claim; we only state discounts our price history proves.
View on AliExpressThe price above is the last recorded reading, not a live checkout lookup.
Price history
Last reading$21.31on Nov 9
Lowest$21.31Nov 2 to Nov 9
Highest$25.37Oct 22 to Nov 2
Tracked since Oct 22 · 1 changeHover over the chart to see each price.Tap the chart to see each price.
See every price change
| When | Price | Change |
|---|---|---|
| Nov 2, 10:06 UTC | $21.31 | −16% |
| Oct 22, 15:43 UTC | $25.37 | start |
| Store | Winsen Official Store |
|---|---|
| Positive feedback (AliExpress) | — |
| AliExpress category | Electronic Components & Supplies › Active Components |
| Sold | 16 |
| Recorded readings | 2 |
| First seen | |
| Last reading |