THERMO Thermometer/Hygrometer – Digital Temperature & Humidity Sensor with 1.5m Probe

Keep your grow room environment perfectly balanced with the THERMO Thermometer/Hygrometer, designed for hydroponic growers who need accurate environmental readings at a glance. 🌡️🌿

With a large digital display and 1.5m probe cable, you can monitor temperature and humidity exactly where it matters most — at plant canopy height. This helps growers maintain ideal conditions for plant health, nutrient uptake, and disease prevention.

Perfect for grow tents, hydroponic systems, greenhouses, and sheltered indoor growing spaces, this simple but essential tool helps you track the environmental factors that directly impact plant growth and yield.

Key Features 🌡️📊

• 📊 Large Digital Display – Clearly shows real-time temperature and humidity readings

• 🌿 1.5m Sensor Probe Cable – Position the sensor at plant canopy height for accurate environmental monitoring

• 🌧️ Indoor & Greenhouse Suitable – Ideal for hydroponic grow rooms, tents, and protected outdoor setups

• 📏 VPD Friendly Monitoring – Track temperature and humidity to assist with calculating Vapour Pressure Deficit (VPD)

• 🔋 Battery Powered – Operates on 1 × AAA battery (not included)

📌 Pro Tip: Hang the probe at plant canopy height for the most accurate environmental readings in your grow space.

Why Use a Hygrometer in Hydroponics? 🌱💧

Monitoring humidity is essential for maintaining a stable hydroponic environment. A hygrometer allows growers to track relative humidity (RH) in real time so they can optimise plant health and prevent common grow room problems.

Key benefits include:

• 🌿 Optimised Transpiration & Nutrient Uptake
  Humidity controls how quickly plants transpire, which directly affects nutrient absorption from the root zone.

• 🦠 Disease Prevention
  High humidity combined with poor airflow can create conditions for mould, powdery mildew, and rot.

• 🌱 Growth Stage Control
  Different stages of plant growth require different humidity levels for best results.

• 📊 VPD Monitoring
  Temperature and humidity data can be used to calculate Vapour Pressure Deficit (VPD), helping growers fine-tune their environment for healthier plants and better yields.

Recommended Humidity Ranges for Hydroponic Growing 🌿

• 🌱 Seedlings & Clones: 60–70% RH

• 🌿 Vegetative Stage: 50–60% RH

• 🌸 Flowering Stage: 40–50% RH

Maintaining the correct humidity range helps prevent plant stress, improves nutrient uptake, and reduces the risk of fungal disease.