Drain Gauge G3 Lysimeter
Characterize variability without stressing your budget
The only accurate way to understand the amount of nutrients or chemicals leaching into the groundwater is to directly measure deep drainage. Large, controlled-tension weighing lysimeters are the most accurate way to make this measurement, but the considerable power and funding requirements of a weighing lysimeter plus the complexity of setup and maintenance may mean you need another option. If you want to characterize variability at a number of locations but don’t have the funding for a collection of large weighing lysimeters, the Drain Gauge G3 has you covered.
Incredibly easy to use
The Drain Gauge G3 allows you to deploy multiple units to cover a large area at an affordable cost. It’s an incredibly easy-to-use lysimeter that provides dependable monitoring of leaching, drainage, and recharge without the complexity of larger systems. This means you can instrument entire agricultural fields to better quantify variability. The G3 was deliberately engineered to be installed below the plow layer, so growers can perform normal operations directly over the instrument, which eliminates problems like edge effects. Plus, the Drain Gauge G3 can be combined with METER soil moisture sensors and precipitation gauges to estimate the total water balance more accurately than methods which only guess at deep drainage as a residual.
Understand leaching at a deeper level
The Drain Gauge G3 is a passive-capillary lysimeter that determines the volume of water and chemicals draining from the root zone into groundwater. Once installed below the root zone, water samples are easily collected through the surface port for analysis of chemicals, fertilizers, and other contaminants. Not only is the Drain Gauge constructed from inert materials so it won’t react with compounds collected in the sample reservoir, it also features a sealed design, which allows it to work in both saturated and unsaturated conditions.
Almost no power or maintenance required
One challenge with lysimeter measurements is that water can flow around receptacles buried in the ground. Unlike traditional pan lysimeters, the G3 corrects for this problem by using an innovative duct and wick design to keep soil tension in the soil column similar to that of the natural soil at the installation site. After installation, the G3 is practically effortless. It requires almost no power and no maintenance other than periodically pulling samples.
Engineered to fit your needs
The Drain Gauge is designed to be flexible to fit your unique application. A stainless steel or PVC divergence control tube holds the soil monolith. Stainless steel is recommended for taking an intact soil monolith, and PVC is recommended for conditions where heavy metals are leaching.
For most applications, we recommend using the add-on Drain Gauge Sensor to measure conductivity, temperature, and depth of the collected sample and to help determine when to empty the sample reservoir. The sensor also provides time-series drainage data, enabling you to correlate drainage with irrigation, fertilization, or other events. For installation sites that are remote or have high drainage rates, use the G3 AutoPump to take samples or empty the reservoir automatically. The sensor and AutoPump can be easily integrated with pre-installed units and are ideal for use with our new ZL6 data logger.
Dependability without complexity and expense
The Drain Gauge G3 accurately measures deep drainage without the hassle and expense of installing a complicated weighing lysimeter. Get simplified sampling, easy data collection, minimal maintenance, dependable data, and excellent representation of variability—all at price you can afford.
Range: 0−61 mm bottom of wick, 61−100 mm top of reservoir chambers
Range: 0-10,000 mm
Range: −40 to +60 °C
|Bulk electrical conductivity (EC)|
Range: 0−120 dS/m
DDI serial or SDI-12 communication protocol
|Data logger compatibility|
METER ZL6 data loggers and any data acquisition system capable of 3.6- to 15.0-VDC power and serial or SDI-12 communication
|G3 Drain Gauge dimensions|
Length: 16.0 cm (6.3 in)
Length: 62.5 cm (24.6 in)
Length:180.0 cm (70.9 in) standard, custom lengths available
|Access tube dimensions|
Length: 81.3 cm (32.0 in)
Length: 9.0 cm (3.5 in)
|Sampling tube dimensions|
Length: 5.0 m (196.9 in) standard, custom lengths available
|Operating temperature range|
Minimum: 0 °C
10.0 m (standard)
4.20 mm (0.165 in) with a minimum jacket of 0.76 mm (0.030 in)
Stereo plug connector or stripped and tinned wires
6 mm (0.24 in)
22 AWG/24 AWG drain wire
|ELECTRICAL AND TIMING CHARACTERISTICS|
|Supply voltage (VCC to GND)|
Minimum: 3.6 V
|Digital input voltage (logic high)|
Minimum: 2.8 V
|Digital input voltage (logic low)|
Minimum: –0.3 V
|Digital output voltage (logic high)|
Typical: 3.6 V
|Power line slew rate|
Minimum: 1.0 V/ms
|Current drain (during measurement)|
Minimum: 0.5 mA
|Current drain (while asleep)|
Typical: 0.3 mA
|Power up time (DDI serial)|
Maximum: 200 ms
|Power up time (SDI-12)|
Typical: 430 ms
|Power up time (SDI-12, DDI disabled)|
Typical: 165 ms
Typical: 150 ms
Manufactured under ISO 9001:2015
California requires the following notice:
⚠️ WARNING: This product may contain chemicals including ethylene glycol, lead, nickel, styrene and cadmium, which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov
LEARN MORE WITH ARTICLES, CASE STUDIES, DEMOS, WEBINARS
- ZENTRA Cloud request a demo
- Cited publications G3
- Webinar: Advances in Lysimetry
- Case study: Lysimeters Determine If Human Waste Composting Can Be More Efficient
- Case study: Are biodegradable mulches actually better for the environment?
- Case study: Irrigation and Climate Impacts to the Water-Energy Balance of the WI Central Sands
- Case study: Oklahoma Switchgrass: How deeper root systems affect the water cycle
Have a question or problem? Our support team can help.
We manufacture, test, calibrate, and repair every instrument in-house. Our scientists and technicians use the instruments every day in our product testing lab. No matter what your question is, we have someone who can help you answer it.
Phone Europe: +49 89 12 66 52 0