Soil Testing Equipment

Feature

• Detects stress earlier than visual monitoring
• Computes Normalized Difference Vegetative Index (NDVI)
• Laser guides outline the edges of the measured sample area
• Calculates and displays a running average for multiple readings
• Connects to any GPS receiver that has a serial output option*
• Equipped with internal data logger and RS-232 port
• Records over 3,000 measurements (1,350 with added GPS/DGPS option)
• Configure and download meter with FieldScout® software and USB-to-3.5mm-Stereo-Plug Adapther (Item 3661U.(included)**
•  Includes hard carrying case and batteries

    *GPS interface requires two cables.  The GPS/DGPS cable (item 2950CV5) is available from Spectrum.
      A PC serial interface cable supplied by the manufacturer of the GPS receiver is also required.
  **PC cable connects to a computer USB port.

The SC 900 is a digital penetrometer, which also has the possibility to log the measured compactionvalues. Uploading the data to the computer for further analysis is possible and connecting to a GPS device for stamping GPS data with your measurements as well. All for further and easy analysis on your computer after being in the field for example plotting all the measurements on a map by using SpecConnect FieldScout Pro software for this purpose. 

With each order you will get:
 

• FieldScout SC 900 Meter with 50 cm probe
• 2 penetration cones: 1,25 cm (fine soils) en 1,9 cm (coarse soils) diameter
• FieldScout software for configuration of the meter and datatransfer to your computer. Compatible with SpecConnect FieldScout Pro software (available separately)
• USB cable (to 3,5 mm jack)
• Depth Target
• Carrying Case

When using a GPS device with the FieldScout SC 900 Meter, your GPS device will need a PC interface port. Please purchase a PC interface cable (serial) from the GPS device manufacturer and also our GPS/DGPS cable (item # ST-2950CV5).
Connect a GPS bracket to the SC 900 meter for placing the GPS device on the SC900 meter for easy use byu having your hands free for measurement taking.

The manufacturer recommends the Garmin GPS 73, available at Garmin or any webstore of your choice.

Soil stirring device, suitable for the mixing of soil/water solutions for analysis in the lab. 

The precision engine is placed in a rubber support, which helps to reduce noise and vibrations to a minimum. The soil stirring apparatus uses an electrically powered four-part blade, and is provided with a mixing beaker with a capacity of 1 litre. Additional mixing beakers can be obtained separately.

Note that the mixer only works when the cup clicks the switch in the guide system. 

• Safe and efficient, guide system easily removable for cleaning
• Non-slip suction cups, stainless steel rod and screw head. 

With this sample set, undisturbed samples can be taken in soft soils to a depth of 2 metres with a diameter of 53 millimetres, provided there are no rocks in its way. Suitable for sampling on the surface, in auger holes or in profile pits, above as well as under groundwater level. There are also two other types of sets available with a different ring size.

The physical properties of soils are largely determined in the laboratory. Such studies usually require undisturbed soil samples, preferably with uniform dimensions. To meet these requirements, soil samples are taken in rings of a known volume and diameter.

Royal Eijkelkamp soil sample rings are made of seamless stainless-steel tube, smooth inside and out for as less as possible friction. The bottom of the ring has a cutting edge. The precise made dimensions and thus the volume content of the ring is exact, which makes it highly suitable for laboratory studies. This set is not suitable for hammering. 

The SOILSPEC system requires very little maintenance - It will provide years of reliable service

The SOILSPEC Moisture Plot software is simple & easy to use

The Tensiometer Tube - an inexpensive tube filled with water. It has a porous ceramic tip at the bottom and a rubber stopper in the top (see diagram). This tube is installed into the ground where you want to measure the soil moisture.

The auge - a very accurate electronic vacuum gauge. This is used to measure the vacuum (or suction) at the top of the tubes. The Standard Gauge (Model SST101G) reads the vacuum in the tensiometer tube. You note down the readings and add this to your plots of soil moisture. The Computer Gauge (Model SST102G) stores readings along with the tube ID. time and date. This is downloaded to your PC using the Moisture Plot software, supplied with the gauge.

The System - A complete system consists of several monitoring sites around the area to be irrigated. Each site needs two or three tubes of different lengths. This allows for the monitoring of soil moisture at various depths and movement of moisture through the soil during the irrigation cycle. Tensiometers results are read and recorded regularly. Graphed figures from each tube provide an accurate picture of soil moisture.

"Nexgen Roorkee Industries" is a leading of Manufacturer and Wholesaler of a wide range of Soil Moisture Meters, Soil Testers, etc.

The wet sieving apparatus is used to determine aggregate stability. Wet aggregate stability is determined on the principle that unstable aggregates will break down more easily when immersed into water than stable aggregates. 8 sieves (with 60 mesh screen) are filled with a certain amount of soil aggregates and placed in a can filled with water. The can moves up and down for a fixed time. The unstable aggregates will fall apart, pass through the sieve, and are collected in the water-filled can underneath the sieve. 

After this fixed time, the cans are removed and replaced by new water-filled cans. Now, all aggregates are destroyed. Sand grains and plant roots will remain on the sieve and only aggregates are considered. After drying the cans with the aggregates, the weight of both stable and unstable aggregates can be determined.

Dividing the weight of stable aggregates over total aggregate weight gives an index for the aggregate stability.

The standard set includes: 

• Shaking machine for wet sieving method (incl. 100-240 VAC 50/60Hz adapter)
• 8 sieves Ø 39x39 mm with sieve opening 0.250 mm and sieve surface of 10.2 cm
• Stainless steel sieve cans Ø 64x45 mm

Optional: sieves with various openings of 2.0 - 0.045 mm and electronic pocket balance.

Applications

• Soil physical laboratory research
• Erosion research
• Soil stability research

The TEROS 11 uses a completely new calibration procedure that maximizes accuracy and minimizes sensor-to-sensor variability while keeping the cost reasonable. So you can be confident that every sensor you install is going to read exactly like the next one. Unlike other sensors on the market which spec an unverifiable  ±1.0% VWC accuracy, the TEROS 11 was rigorously tested by our soil physicists across a challenging range of soil types and EC levels so you can be confident in the accuracy of your data.

Plus, TEROS sensor repeatability can be checked with an accuracy verification standard. No other soil moisture sensor has this ability. Just slide the verification clip onto a sensor and plug it into a logger. If it reads within the right range, your sensor is good to go.

he TEROS 12 soil moisture sensor uses a completely new calibration procedure that maximizes accuracy and minimizes sensor-to-sensor variability while keeping the cost reasonable. So you can be confident that every sensor you install is going to read exactly like the next one. Unlike other sensors on the market which spec an unverifiable  ±1.0% VWC accuracy, the TEROS 12 was rigorously tested by our soil physicists across a challenging range of soil types and EC levels so you can be confident in the accuracy of your data.

Plus, TEROS sensor repeatability can be checked with an accuracy verification standard. No other soil moisture sensor has this ability. Just slide the verification clip onto a sensor and plug it into a logger. If it reads within the right range, your sensor is good to go

When it comes to measuring water potential (or soil suction), it's hard to find a sensor that meets your every need. You're either forced to deal with lowered accuracy or high-maintenance hassles (plus getting soaked on cost). That's why we invented TEROS 21.

Broad soil applications. Dependable accuracy.

To say TEROS 21 is more accurate than competitor sensors doesn't do it justice. That's because unlike competitor models, we calibrate each and every sensor for you. To do this, we use a process that has been refined and perfected over the years that allows the TEROS 21 water potential sensor to come to a fixed water potential. The result: a long-term monitoring solution you can finally trust.

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A true full-range water potential sensor that's low maintenance and low cost

The TEROS 21 water potential sensor is incredibly easy to use. It requires no maintenance, and it's accurate enough for most applications. In fact, the TEROS 21 provides an even more accurate soil moisture picture than measuring water content alone. A water content sensor only shows the percentage of water in the soil, but add a TEROS 21 water potential sensor, and you'll know if that water is available to plants and where it will move. Plus, unlike water content, matric potential isn't dependent on soil type, so you can compare moisture between different sites. Not only that, the TEROS 21 is surprisingly affordable, and the new Gen 2 version boasts an improved circuit, a more robust microprocessor, and an improved measurement range. It now measures all the way from near saturation to air dry (0 to −100,000 kPa) making it the world's first true full range water potential sensor

The TEROS 22 water potential sensor is incredibly easy to use. It requires no maintenance, and it’s accurate enough for most applications. In fact, the TEROS 22 provides an even more accurate soil moisture picture than measuring water content alone. Plus, unlike water content, matric potential isn’t dependent on soil type, so you can compare moisture between different sites. Just like the TEROS 21, the TEROS 22 is surprisingly affordable and measures all the way from near saturation to air dry (0 to −100,000 kPa) making them both true full range water potential sensors.

The tensiometer is, indisputably, the most accurate way to directly measure water potential in the wet range. But measuring with a tensiometer is complicated. Most require sophisticated wiring and complex programming, not to mention the constant maintenance, checking, and refilling. Now there’s a new way. Introducing TEROS 32.

Now, sit back, and relax

TEROS 32 is a simple, plug-and-play tensiometer that combines METER’s legendary German precision engineering with the power of ZENTRA Cloud, giving you easier, faster, more accurate water potential data in near-real time. Just install it and plug it in. It’s that easy. With ZENTRA Cloud software, you can review data as it happens from the comfort of your office, ensuring every tensiometer is working as expected. No more worrying if your tensiometer has cavitated. Combine the TEROS 32 with the TEROS 12, and you’ll know the best time to go out and refill. Plus, you can use both sensors to generate in situ moisture release curves.

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More robust, if that’s even possible

Twenty-five years of tensiometer experience and fanatical attention to detail have made METER tensiometers practically bulletproof, but the TEROS 32 tensiometer is more robust than ever before. Technological advancements have made it possible to incorporate a more ruggedized, highly precise pressure transducer, giving you higher data resolution in an almost unbreakable form, and making the TEROS 32 more affordable than its predecessors. Plus, the ceramic and shaft are engineered to be virtually indestructible when it comes to harsh weather (10-year warranty on the ceramic), which means the TEROS 32 is a tensiometer you can rely on year after year in every season.

Field measurement and calculation of the unsaturated hydraulic conductivity K(h) using Hood Infiltrometer (Umwelt Geräte Technik, GmbH.): The Hood Infiltrometer IL-2700 is a device used for determination of saturated and unsaturated hydraulic conductivities in-situ. Compared to other Infiltrometer designs (e.g. Perroux and White, 1988; Ankeny et al, 1991; Vandervaere et al., 1997; Špongrová et al., 2009 and others), infiltrating water is in direct contact with the infiltration surface, there is no need for any contact material, and only cutting the vegetation cover to the approx. 5 mm height is needed. The contact material creates an additional layer, which can affect the infiltration process and makes the subsequent data analysis more complicated.

This procedure is demonstrated step by step here on the video. However, reading the following text carefully is recommended before watching the video.

Measuring soil water potential is never easy. Traditional methods such as pressure plates or filter paper have always been problematic. Not only are they extremely time consuming, but both methods have issues with accuracy. That’s why we developed the WP4C.

Simply accurate. Simply fast. Simple to use.

As world experts in water potential and soil suction, it wasn’t enough to engineer an instrument that delivered consistent accuracy. We also designed it to be easy to use and take only minutes to register measurements, even in dry soils. The WP4C is a complex instrument due to its versatility, but extremely easy to use with sample sizes up to 7 ml. Simply fill half of the cup with soil, leaves or seeds, and then equilibrate the sample.

20 minplant sample read time

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Proven first-principles method based on fundamental physics

The WP4C is so accurate, it’s used to calibrate other measurement methods and has been published extensively. Why? The dew point sensor inside the WP4C is a primary measure of water potential, not some secondary parameter merely correlated with water potential. It measures the combined matric and osmotic potential using fundamental thermodynamics and a finely-tuned calibration. Here’s how it works:

The WP4C determines the relative humidity of the air above a sample in a sealed chamber (conforms to ASTM D6836). Once the sample comes into equilibrium with the vapor, relative humidity is determined using the chilled mirror method. This involves chilling a tiny mirror until dew starts to form. At the dew point, the WP4C measures both mirror and sample temperature within 0.001 °C. This allows for unparalleled accuracy in the -0.1 MPa to -300 MPa range so you can have full confidence in sample readings.

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