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.

Climate

Wireless Temp & Humidity Reader

Name: Wireless Temp & Humidity Reader
Brand: Budometry
SKU: hygrometer
Price: 34 USD
Availability: InStock

Stage: All stages

$34

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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

Pairs with

Grow Room Dehumidifier, 30 Pint

Holds flowering rooms at 45-50% RH to prevent bud rot and powdery mildew.

$189

6" Inline Fan + Speed Controller

Exchanges tent air every minute to keep temps down and mold pressure low.

$119

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.