The Tropf Blumat is a ceramic soil moisture sensor that automatically waters your plants at their own preferred rate — no timers, no electricity, no programming. Each sensor reads soil moisture and opens or closes water flow accordingly, letting every plant determine its own irrigation schedule. How It Works ＋ Each sensor is filled with water and voided of air before being connected to a supply line. The ceramic cone is the only point of contact with the soil. As the soil dries, it pulls moisture from inside the ceramic cone through osmotic pressure. Since the sensor is sealed, this creates a pressure differential that pulls on a plastic diaphragm inside the top of the sensor. The diaphragm opens the irrigation tube, allowing water to flow through gradually. Water is emitted and moisture is slowly restored to the surrounding soil. Once moisture equalizes, the pressure difference is relieved and the diaphragm closes the irrigation tube. The sensor resets and waits for the next dry cycle. The brown adjustment knob on top can be calibrated to specific plant types, strains, or growing media. Specs & Dimensions ＋ Materials — Clay ceramic, silicone, plastic Weight — 1.3 oz Total length — 5.2" Max soil depth — 4" Cap width — 1.4" Sensor width — 1" Tubing length — 8" Flow rate — Adjustable Connects to — 8mm Blumat and SuperFlex tubing Standalone? — No — requires a water source Installation Instructions ＋ Water your garden thoroughly (ideally overnight) before installation. Prep the sensors: Fill a container with cooled, non-aerated water. Separate the ceramic bottoms from the plastic tops and soak both for at least 15 minutes. While holding the green top underwater, use a pipette or your thumb to push water into the holes in the cap to displace any air bubbles. Hold both parts underwater, confirm no air remains, and reassemble while still submerged. Keep sensors submerged until ready to install. While sensors are soaking: Connect 8mm tubing to your reservoir or pressure reducer. Run the 8mm tubing to your plants. Installation: Water the garden again and push the sensor into the soil where you want moisture sensed. The ceramic cone must be fully covered and firmly anchored. Cut the 8mm tubing and insert the included 8x8x3mm tee. For the last sensor, use the elbow instead. Add a shut-off valve after the final sensor as an air/debris purge valve. Adjustment: Turn on water and open each sensor valve until flow is visible. Slowly tighten clockwise until a hanging drop is just achieved, then tighten two more triangles to calibrate to current moisture levels. *If using BluSoak drip tape, stop at the hanging drop — do not tighten the additional two triangles. Monitor: Check back in 12–24 hours and fine-tune. Tighten for less water, loosen for more. Use the Blumat Digital Moisture Meter to dial in precisely. Resources & Maintenance ＋ Guide to Tropf Blumat Sensors Blumat Troubleshooting & Operating Tips
