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The ETI Room Hygrometer is a grow room essential for humidity monitoring. Its 70mm analogue dial and colour-coded zones provide instant, accurate Relative Humidity (RH) readings (0-100%rh). Ideal for greenhouse and hydroponics use to prevent mould and optimise plant health.
Take precise control of your growing environment with the ETI Room Hygrometer. This reliable, general-purpose analogue hygrometer is an essential piece of equipment for any grow room, greenhouse, or propagation area, providing instant and accurate feedback on your Relative Humidity (RH) levels.
Maintaining the correct room humidity is vital for preventing issues like mould and optimising crucial stages such as seed germination and plant health. The ETI Hygrometer features a large, easy-to-read 70mm diameter dial with a clear arrow indicator, enabling fast visual monitoring of your conditions. The intuitive colour-coded zones (Dry, Moderate, Humid) offer immediate confirmation of whether your environment is within the optimal range. The unit displays the full humidity spectrum from 0 to 100%rh in 5% divisions, all housed in a durable ABS case that can be free-standing or easily hung from a shelf.
Key Benefits of the ETI Room Hygrometer
- Quick Visual Monitoring: The 70mm dial with colour-coded zones allows for rapid, at-a-glance checks, simplifying environmental control for busy growers.
- Wide Measurement Range: Monitors the entire spectrum of Relative Humidity from 0 to 100%rh, making it suitable for all plant stages, from high-humidity cloning to low-humidity flowering/drying.
- Flexible Placement: The compact (70mm x 60mm) and robust ABS casing can be free-standing or hung by the hook for easy mounting near the plant canopy.
- Essential Disease Prevention: Reliable humidity monitoring is the first line of defence against common fungal diseases like powdery mildew and bud mould.
- Optimises Plant Health: Helps you manage transpiration and water uptake, ensuring seedlings don't dry out and mature plants absorb nutrients efficiently.
Frequently Asked Questions
What is the ideal humidity range for plants in a grow room?
The ideal Relative Humidity (RH) varies significantly by growth stage. Generally, aim for 65-70% RH for seedlings/clones (propagation stage), dropping to 40-60% RH during the vegetative stage, and further reducing to 40-50% RH during flowering to prevent mould and encourage essential oil production.Where is the best place to position the ETI Hygrometer?
For the most accurate reading, position the hygrometer at the same height as your plant canopy or the top of your pots. Crucially, keep it away from direct sunlight, air vents, or direct blasts from oscillating fans or humidifiers, as these can skew the local reading.Why is humidity monitoring so important for plant health?
Monitoring is essential because humidity directly affects plant transpiration (breathing) and water absorption. Too low RH causes plants to transpire too fast, leading to stress and nutrient issues. Too high RH slows down transpiration, and more critically, creates the perfect breeding ground for destructive mould and mildew, especially in dense plant canopies.Is an analogue (dial) hygrometer accurate enough for hydroponics?
Yes, the ETI Dial Hygrometer is perfectly suitable for hydroponics and gardening. While a digital model offers a precise number, this analogue gauge is excellent for confirming that your RH level is within the correct colour-coded zone and allows you to quickly track major changes and trends without needing batteries.SKU: 2411Free delivery on orders over £60*
- UK Mainland onlyStandard Delivery £4.95
- Heavy / Large item surcharge £2 per item
- 1-3 Days**
- UK Mainland onlyExpress Delivery £8.95*
- Next Working Day**
- UK Mainland onlyScottish Highlands £15.95*
- 2-5 Days***Can not be used with Heavy / Large items
**If ordered on a working day before 2pm cut off (Saturday and Sunday are not classed as working days).Please See Delivery and Returns page for more details.