Drain Gauge G3 Lysimeter
No more deep drain on your pocketbook
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.
Recharge your research budget
The Drain Gauge G3 was specifically designed to measure deep drainage over larger areas at an affordable cost. It’s an incredibly easy-to-use lysimeter that provides dependable monitoring of groundwater 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.
A simple design with sophisticated results
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.
Your lysimeter—your way
The Drain Gauge is designed to be flexible to fit your unique application. A stainless steel or PVC divergence tube holds the soil monolith where water is collected. 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, depth and to help determine when to empty the sample reservoir. 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 EM60G cellular data logger.
Deep-six 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.
Total length: 147 cm
Drainage: 0-61 mm bottom of wick and 61-100 mm top of reservoir chamber
Drainage: 0.2 mm
Drainage: +1.4 mm
|Suction at intake|
110 cm (11 kPa)
|Solution collection capacity|
3.1 L (6.1 cm of drainage) to bottom of wick
|Solution collection surface area|
507 cm2 (25.4 cm inside diameter)
DCT (standard): 304 Stainless Steel 11 gauge
0 to 50 °C (Pressure transducer cannot be allowed to freeze while submersed.)
3.6 - 15 VDC, 0.03 mA quiescent, 0.5 mA during 300 ms measurement
300 ms (milliseconds)
Serial TTL, 3.6 volts levels or SDI-12
3.5 mm (stereo) plug, or stripped & tinned lead wires (3)
10 m standard; custom lengths available upon request
|Data logger compatibility (not exclusive)|
METER Em50/60 Series, ProCheck, Campbell Scientific
ECH2O Utility (rev 1.64+), DataTrac 3 (rev 3.4+)
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 US: +1 509-332-5600
Phone Europe: +49 89 12 66 52 0