Thirsty Light Original Digital Indoor Plant Moisture Sensor

by Thirsty Light

• LED light alerts user when plant needs water
• Corrosion resistant brass probe
• 2 Replaceable 1/5v batteries
• ABS plastic casing
• Perfect for forgetful plant waterers

Product Details

• Product Dimensions: 9.5 x 3.2 x 0.2 inches ; 3.2 ounces
• Shipping Weight: 1 pounds (View shipping rates and policies)
• Shipping: This item is also available for shipping to select countries outside the U.S.
• ASIN: B0017RXJUS
• Item model number: HGTL
• Average Customer Review: 2.5 out of 5 stars  See all reviews (45 customer reviews)
• Amazon Best Sellers Rank: #19,341 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden)
  • #41 in Patio, Lawn & Garden > Gardening > Gardening Tools > Soil Testers

Product Description

Amazon.com

Take the guesswork out of watering your potted plants with the Hydrofarm Thirsty Light Original Digital Indoor Plant Moisture Sensor. When a plant's soil becomes dry, the LED on the Thirsty Light blinks to let you know. The sensor head measures just over 2-inches long, so you won't even know it's there until it starts blinking. You can leave the resilient sensor in one pot, or use it to periodically check moisture levels in all your indoor pots--it tests conditions in one second, providing fast, accurate reads.

Hydrofarm Thirsty Light Original Digital Indoor Plant Moisture Sensor At a Glance: LED light blinks when soil becomes dry Sensor detects five different levels of dryness Unobtrusive design blends in until light starts blinking Durable brass probe resists corrosion 30-day limited warranty

Take the guesswork out of watering your potted plants. View larger.

Blinking LED light lets you know when soil is dry. View larger.

LED Alert Tells You When to Water Plants
Thirsty Light continuously monitors the condition of the soil in your potted plants, testing the moisture level once every second. The senor top features a small LED light that flashes once it's time to water your plant. While the sensor measures a total 6.5 inches, the green top is a mere 2-inches long, so you won't notice it until the soil becomes dry.

By letting you know when your potted plants need water, Thirsty Light eliminates the temptation to overwater plants. A comprehensive user and watering guide is included.

Light Blinks Faster as Soil Becomes Dryer
This sensor uses Drypoint technology, which can sense five different levels of dryness. As the soil gets dryer, the light blinks faster, letting you know how urgent the need for water is becoming. The included moisture signal chart explains each blinking pattern, as well as where to properly insert the sensor's probe.

The sensor also has a unique blinking pattern to indicate when the batteries are low.

Resilient and Long-Lasting Probe
Thirsty Light features an ABS plastic casing and a durable brass probe. With constant use, the probe will change color and develop a patina, which simply helps protect it from corrosion. If left in soil for long periods of time, simply wipe the probe with a damp cloth to remove mineral deposits.

Product and Warranty Information
The Thirsty Light is backed by a manufacturer's 30-day limited warranty against defects in materials and workmanship. It's powered by two included 1.5-volt lithium batteries that can be replaced when necessary.

What's in the Box
Moisture sensor, two batteries, and user guide.

Product Description

The Thirsty Light is a digital plant moisture sensor that blinks an LED to alert the user when it is time to water a potted plant. It is designed to be unobtrusive when left in the soil of a plant, where it continuously monitors conditions, testing the moisture level once per second. Thirsty Light can sense 5 different levels of dryness, causing the light to blink faster as the soil gets dryer, increasing the urgency of its call to action. When it reaches the fifth level, "completely dry", the device goes into standby mode to conserve electricity, emitting a double blink every 3 seconds. There is a low-battery mode as well: a slow triple blink. The Thirsty Light comes with a comprehensive and informative user and watering guide.

Most Helpful Customer Reviews

7 of 7 people found the following review helpful

5.0 out of 5 stars Very reliable and helpful February 9, 2010

By Jennifer Hadley

I'm terrible with houseplants. I received one of these as a gift, and for two years it's been keeping my plant alive - never even had to change the battery. I'm looking to buy a second one.

6 of 6 people found the following review helpful

3.0 out of 5 stars Works, but kind of delicate. September 20, 2011

By conglacious

I ordered three of these. I turned the first one to the on position expecting a click or something and I ended up twisting too hard i guess. The little knobs on the on switch broke under limited twisting pressure. I was much more careful with the other two, but it would have sucked if I only got one. When you go to turn it on, make sure to gently rotate to the on button and do not twist too much. This is only the first day, but the other two seem to be working as advertised. When I stuck one in a plant, it started blinking immediately, then subsided when water was applied. The second one was put into a plant that did not need water.

On a side note, the water sensor is only two pieces of metal separated by plastic. I bet one could easily make one of these things with just an LED and a battery. Just a thought.

4 of 4 people found the following review helpful

4.0 out of 5 stars Good for those without a green thumb July 10, 2011

By Bear

Amazon Verified Purchase

I have a small tree in my apartment that I had a habit of over-watering. I stuck this in the pot and now I know not to water unless the light is flashing. My plant is no longer water logged and seems much happier. The Thirsty light would also work well for people who tend to underwater and need a reminder.

Note: You can leave it in like I do, or save battery and just check the soil periodically.