
Climate
Wireless Temp & Humidity Reader
Stage: All stages
$44
You cannot fix a climate you are not measuring. Most beginner problems — droop, crispy tips, slow growth — are temperature and humidity problems in disguise.
This sensor logs canopy temp and RH straight to your phone so you can see the overnight humidity spike you would otherwise sleep through.
Min/max alerts tell you when the tent drifts out of range so you can react before the plants show damage.
Specs
| Measures | Temperature + relative humidity |
|---|---|
| Connectivity | Bluetooth to phone app |
| Logging | Rolling history with min/max |
| Accuracy | ±0.5°F / ±3% RH |
| Power | Coin cell, ~1 year |
Which kits include this
The kit builder puts this item in these builds automatically, sized to the space you pick:
- 2 x 2 ft tent (compact corner)
- 2 x 4 ft tent (narrow footprint)
- 3 x 3 ft tent (spare room)
- 4 x 4 ft tent (garage / spare bedroom)
- 5 x 5 ft tent (dedicated room)
- 4 x 8 ft tent (basement wall)
Pairs with
Reviews
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Questions about this product
- Where do I put the sensor?
- At canopy height, out of direct light. That is the air your plants actually live in.
- What is VPD and do I need to care?
- VPD combines temp and humidity into one number describing how hard plants have to work to transpire. Our free VPD calculator turns your readings into a target.


