Hygrometers
Thermometers and hygrometers for grow tents: the ThermoPro TP358 Bluetooth thermo-hygrometer, a digital hygrometer with min and max memory, the AirComfort temperature and humidity sensor, a thermo-hygrometer with CO2 monitor and the Vivosun GrowCam C4 camera.
In StockiBebot
AirComfort Temp & Humidity Sensor
£26.96
In StockGarden HighPro
£8.96
In StockHighlight
Thermo/Hygrometer With CO2 Monitor
£22.46
In StockThermoPro
ThermoPro TP358 Bluetooth Thermo Hygrometer
£17.96
Pre-OrderVivosun
£50.36
About Hygrometers
Why measure
Temperature and humidity together decide how fast plants drink and grow and whether mould gets a hold. A meter with a min and max memory shows what happens at night when you're not there, which is where most problems start. Aim for 22 to 28°C with the lights on, no more than a 10°C drop at night, and the humidity range for the stage of growth.
Where to put it
At canopy height, shaded from the lamp, halfway into the tent. The ThermoPro TP358 sends its readings to a phone by Bluetooth and keeps a history; the AirComfort sensor does the same for AC Infinity controllers. The GrowCam lets you watch the room from anywhere.
Growers' Guides
- Grow Tent Humidity: How to Lower or Raise ItGrow tent humidity targets for each stage, why it climbs at lights-off, how to lower or raise it, and when you need a humidifier or a dehumidifier.
- Powdery Mildew: What Causes It and How to Get Rid of ItPowdery mildew in a grow room or greenhouse: what causes it, how to tell it from grey mould (botrytis), and how to get rid of it with drier, moving air.
- VPD Chart: What Vapour Pressure Deficit Means for Your PlantsVPD explained in plain terms, with a chart by temperature and humidity, the ranges to aim for at each stage, and how to measure and control it.
- Red Spider Mite: How to Spot It and Get Rid of Spider MitesWhat spider mites and their eggs look like, the speckled leaves and webbing they leave, why they spread so fast and how to get rid of red spider mite.
- The Importance of Airflow, Temperature & Humidity in a Grow RoomCreating the perfect environment inside your grow room isn’t just a matter of comfort for your plants - it’s the foundation of healthy growth, efficient…
- What You Need to Grow Indoors: The Kit ChecklistWhat you need to grow indoors as a beginner: tent, LED, fan and filter, hangers, timer, hygrometer, pots, soil or coco, feed, pH kit and our kits.