Decagon Devices, Inc.

20 products found


  • Water Potential Instruments

    Water potential describes the force that drives water movement. It is the most fundamental and essential measurement in soil physics.

  • AquaSorp Isotherm Generator

    AquaSorp Isotherm Generator

    The Aquasorp IG brings click and read efficiency to soil isotherms. In 24 to 48 hours, Aquasorp generates ip to 200 points ( range -5 to -500 MPa) to create a soil moisture release curve (water potential vs. water content). The aquasorp creates both a wetting and drying curve to identify any potential hysteresis in a soil. Whether you are studying adsorption/desorption characteristics or characterizing soil expansion, the Aquasorp will provide the...

  • Stomatal Conductance / Porometry Instruments

  • Ceptometer PAR/LAI Instruments

  • Model LP-80 - AccuPAR

    Model LP-80 - AccuPAR

    Measure Canopy PAR: The AccuPAR is a lightweight, portable PAR sensor wand that lets you measure canopy PAR interception at any location within a canopy. PAR data can be used with other climate data to estimate biomass production without destroying the crop. PAR is also important in determining other canopy processes, like radiation interception, energy conversion, momentum, gas exchange, precipitation interception, and evapotranspiration.

  • Soil Moisture Sensors

    Soil moisture is highly variable. Accuracy from a single site isn't enough to run an experiment. To make good soil moisture measurements, you need research quality probes and you need a lot of them. Decagon's soil moisture sensors are research grade probes at a price that lets you completely characterize your site.

  • Model EC-5 - Soil Moisture, Small Area Of Influence

    Model EC-5 - Soil Moisture, Small Area Of Influence

    Our lowest-cost soil moisture sensor. Measures Volumetric Water Content only. Just 5 cm long with a 0.3 L measurement volume, this handy little sensor is easy to install in the field and can also be used in nursery pots.

  • Water Potential Sensors

    Water potential describes the force that drives water movement. It is the most fundamental and essential measurement in soil physics.

  • Tensiometers


    These modernized tensiometers, built by German company UMS, are THE most accurate way to measure soil matric potential. Thanks to precision engineering, meticulous construction, and fanatical attention to detail, they have terrific accuracy and a range that (with a skilled operator) can extend beyond -200 kPa.

  • Environmental Sensors

    Use these environmental sensors to characterize water movement beyond the soil. Useful for environmental modelling, completing a water balance, and just generally describing how water is moving through the soil-plant-atmosphere continuum.

  • Leaf Wetness Sensor

    Leaf Wetness Sensor

    Detect wetness and ice formation with a sensor that closely mimics the wetness state of real leaves. No painting or user calibration required. Plug-and-read with the Em50 series of data loggers.

  • Continuous Data Loggers

    Looking for a logger to power your sensors and read and store the measurement data? The Em50 series simplifies data logging because it's: Pre-programmed. No user programming necessary. Powered by 5 AA batteries. No external power source required. Weatherproof. No extra enclosure needed.

  • Em50G Wireless Cellular Data Logger

    Em50G Wireless Cellular Data Logger

    Em50 data logger with cellular connectivity. Check on your data logger and view your data from virtually anywhere in the world. Wireless cell modem automatically sends data to an internet server four times a day. Two year data plan included in initial purchase; after that, requires an annual fee.

  • Em50R Wireless Radio Data Logger

    Em50R Wireless Radio Data Logger

    Em50 data logger with radio connectivity. Transmit data wirelessly from the Em50R to a computer over intermediate (1-3 mile) distances. Can connect multiple logger nodes to a single central data station. Limited range, but no annual costs for data plan subscription.

  • Environmental Monitoring Systems

  • Irrigation Monitoring System

    Irrigation Monitoring System

    Know When to Turn it On: Most irrigation systems rely exclusively on soil moisture sensors. Soil moisture sensors can't tell you how much of the water that's present is actually available to plants. This system uses an MPS-1 matric potential sensor to measure plant available water so you know when to turn the water ON. Know When to Turn it Off: Fast-response soil moisture sensors let you track plant water use in real time and set an accurate full...

  • Lysimeters & Infiltrometers

  • Drain Gauge - Passive Capillary Lysimeter

    Drain Gauge - Passive Capillary Lysimeter

    Monitor Groundwater Leaching: Use the Drain Gauge to determine the volume of water and chemicals draining from the vadose zone into groundwater. Identify Contamination: The one and a half meter tall Drain Gauge is buried directly in the ground to measure flow rate in unsaturated soils and collect soil water samples for chemical analysis. Water samples can be collected easily through a surface port to analyze for chemicals, fertilizers, and other...

  • Suction Cups & Pore Water Sampling

    Suction Cups & Pore Water Sampling

    Monitor Soil Water Contamination: Sampling and testing soil pore water provides infomration about chemicals and chemical movement below the ground surface. Pore water samplers provide an early detection system for leaching, drainage, and leakage problems. Standard sampler length is 30 cm. Also available in 60, 90, 120, 160, and 200 cm lengths.

  • Volumetric Water Content Sensors

  • Water Potential

  • Decagon - Model MPS-6 - Calibrated Water Potential Sensor

    Decagon - Model MPS-6 - Calibrated Water Potential Sensor

    The MPS-6 is a matrix water potential sensor that provides long term, maintenance-free soil water potential and temperature readings at any depth without sensitivity to salts. The range of the MPS-6 goes from field capacity to air dry. Lab and field tests indicate that it can make accurate measurements at water potentials at least as dry as permanent wilting point.

Products by UMS AG

  • Tensiometers

  • Model T4 - Tensiometers

    Model T4 - Tensiometers

    The T4 precision Tensiometer - developed for outdoor monitoring projects. Only the ceramic cup is filled with water for highest accuracy and year-round operation. Optionally with external refilling: The model T4e with external refilling can be refilled or emptied without removing it from the soil.

  • Model T5  - Laboratory Tensiometer

    Model T5 - Laboratory Tensiometer

    The T5 Tensiometer is specially made for punctual measurements, for example in soil columns, small lysimeters or pots. With an active surface of only 0,5 cm2 and a diameter of 5 mm the ceramic tip has all advantages of small dimensions: little soil disturbance, punctual pick-up and fast response. The special version T5x can achieve a measuring range of 200 kPa. The T5 can be installed in any position and orientation. Bubbles are easily detectable...

  • Model T8 - Tensiometer

    Model T8 - Tensiometer

    The T8 is characterised by maximum user comfort and was developed for long term monitoring projects.

  • Model TS1  - Self Refilling Tensiometer

    Model TS1 - Self Refilling Tensiometer

    If your task is soil water monitoring you know the problem: water vaporizes and is lost. If soil gets dryer than about 85 kPa, no tensiometer is able to take measurements. Still, as only little water movements occur in extreme dry soil, losing readings is tolerable. Then, when the soil gets wet again, the Tensiometer could actually restart measurements - but first it needs to be refilled again. Now, the TS1 solves this problem: In case the cup...

  • Vacuum Systems