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Solinst Canada Ltd. manufactures high quality groundwater and surface water monitoring instrumentation.
Solinst Canada Ltd. manufactures high quality groundwater and surface water monitoring instrumentation.


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Selecting the Right #Groundwater Sampler: There is much to think about before selecting a groundwater sampler for your project. Here are just a few things you probably need to consider; what you are sampling for: general chemistry, volatiles, metals, etc.; type of sample you need: low/high volume, purging or grab; ease of sampler operation, repairs in field, decontamination; your budget. Thankfully, #Solinst has a wide range of groundwater samplers to choose from, so you will be able to find one that meets your criteria. Read the full post in the Solinst ON THE LEVEL Blog:
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#Solinst #Leveloggers Monitor #Irrigation Channels In #Peru

Irrigated agriculture in Peru has been an important part of the country’s growth and development, dating back before the Incan Empire. Recently, concerns including water stress, declining #water quality, and vulnerability to climate change have induced a push from the Peruvian government to improve the performance of the existing irrigation systems.

The National Water Authority (Autoridad Nacional del Agua, ANA) is responsible for designing and implementing sustainable irrigation practices nationally. They work with local Water Users Boards who operate and maintain the irrigation systems regionally.

The ANA has an objective of accurately calculating the average amount (volume) of water used by each of the Boards. This data will allow them to track and determine the ideal amount of water to allocate to each Board and the agricultural users in that region.

Flow is monitored, and volume is calculated using flumes in the irrigation channels. #Flumes are fixed shaped hydraulic structures that create a relationship between water velocity and level in the channel. Generally, flow is measured by calculating the velocity of water through the area of the flume. As flumes are a set width, height of water (head) is required to calculate the area, thus flow.

Traditionally, the height of water is determined by manually reading the level from visual markings on the side of the flumes. These readings have low accuracy and provide low-resolution data, as the levels are only recorded periodically.

High Tech Service, exclusive distributor of Solinst products in Peru, installs, calibrates, and repairs #environmental monitoring instruments for projects throughout the country. High Tech Service started working with the Peruvian government in October 2014, to help provide a more efficient way to collect high-resolution data from the flumes.

After several meetings with stakeholders, the ANA, and Water Users Boards, High Tech Service was given the assignment of installing Solinst Levelogger water level dataloggers to measure the height of water in each of the flumes.

Once installed, Leveloggers can be left unattended to automatically record and store continuous water level measurements. As a result, the costs to send out personnel for manual data collection are reduced, while the amount of reliable data recorded is increased.

To protect the Leveloggers (and associated Barologgers for barometric compensation of the water level data), concrete structures to house the instruments were built next to the flumes. A total of 148 monitoring stations have been installed in 6 different regions of Peru; 3 in Tumbes, 47 in Piura, 38 in Lambayaque, 27 in Huaral, 25 in Arequipa, and 8 in Tacna.

The Leveloggers and Barologgers have been set to record at either 5 or 10 minute intervals. The water level and barometric data are regularly downloaded in the field using a laptop and Levelogger PC Software. To optimize efficiency, if future budget allows, High Tech Service is hoping to use telemetry to remotely send the measurements to a central database.

Currently, the Levelogger data is being used to determine flow (volume) with greater accuracy than previous practices. The data will allow allocation of an exact volume of water to each user, and help to effectively control irrigated water usage throughout the country.

Solinst thanks Jesus Lino Ayala, Manager of Operations at High Tech Service S.A.C, for providing the details of this project.
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#Solinst is continually improving and upgrading our #Levelogger Series of #water level #dataloggers with new functionality and features, as such, there are periodic software and firmware releases to go with these enhancements. Solinst always recommends using the latest software and firmware with your Leveloggers to get the most out of the instruments, but how do you know when these releases happen, and if you need to update? Read our blog post to learn how to keep on top of any new Solinst software or firmware release:
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The #Solinst Model 660 Drive-Point Profiler is designed to allow collection of #groundwater samples from multiple points in a single drive/drilling location, at discrete zones. It can be installed with a rig that pushes, hammers, or vibrates the Profiler into suitable sands. It uses AW rod and can be adapted to attach to custom rods used by some rigs. The profiler has a 1.75" (45 mm) dia. AW stainless steel tip with one row of screened inlet holes set circumferentially leading to a single LDPE or PTFE stainless steel sample line:
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See how #Solinst has designed the AquaVent and LevelVent #water level #dataloggers with a vented cable that is low maintenance compared to traditional vented loggers:
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#Solinst Bladder #Pumps The Solution In #PCE Vertical Distribution Investigation


Gruppo Egeo, the exclusive distributor of Solinst products in Italy, recently worked with a client with very specific #groundwater sampling requirements.

Their client Tecno Habitat, an engineering company specializing in the #environment, has the task of investigating the vertical distribution of tetrachloroethylene (commonly known as PCE) in the groundwater at an abandoned industrial site.

PCE is a moderately toxic chemical that is most commonly used in dry-cleaning and degreasing products. It is classified as a volatile organic compound (VOC). PCE is mobile in groundwater, and in sufficient quantities is found as a dense non-aqueous phase liquid (DNAPL).


Three main factors were considered when selecting the appropriate groundwater-sampling pump.

1. Flow Rate

When sampling for VOCs, an important goal is to minimize the disturbance of groundwater in order to reduce off-gassing of VOCs.

Low flow sampling is a widely accepted sampling protocol, especially when VOCs are involved. Low flow sampling involves extracting groundwater at rates comparable to ambient groundwater flow. Drawdown, mixing, and turbulence are minimized, allowing a sample that is representative of actual in-situ conditions.

Check out our technical bulletin for more on low flow, VOC sampling. A pump that provides a low flow rate of 100 ml/min was deemed ideal in this case for minimizing off-gassing. As such, traditional sampling systems such as bailers and inertial pumps were eliminated as options.

2. Sampling Depth

Next, the required sampling depths had to be taken into account. The four monitoring wells being sampled have static water level at 37.5 meters below ground surface. Samples are required from 42, 46, and 48 meters below the surface.

This ruled out the use of low flow sampling options, such as a peristaltic pump, which is designed for shallow groundwater sampling scenarios.

3. Water Temperature Stability

The concentration of PCE in groundwater is highly sensitive to variations in temperature. Therefore, this excluded the use of samplers that use submersible motors.

The use of down-well motors could potentially raise the temperature of the groundwater, causing the concentration of PCE to change and become unrepresentative of the actual conditions.


Solinst Bladder Pumps were selected as they meet and exceed the criteria for this sampling project.

Flow rate: when using a Solinst Electronic Pump Control Unit, the Bladder Pump can be adjusted to provide a continuous output of 100 ml/min or less.
Sampling depth: Solinst Bladder Pumps can lift from depths up to 150 meters (500 feet) below grade.

Water temperature stability: Solinst Bladder Pumps are operated using an Electronic Pump Control Unit and an air compressor or compressed gas source at the surface. There are no components that would introduce a temperature change down-well.

In addition to providing low flow rates, Solinst Bladder Pumps have other characteristics that make them ideal for VOC sampling.

The pump tubing and bladder ensure there is no air/water contact during operation, reducing the risk of the sample being aerated.

During operation there is slow, steady compression of the bladder, minimizing off-gassing and turbulence, allowing undisturbed VOC samples.
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The Nature Conservancy Latin American Region is using #Solinst #Leveloggers and #Barologgers in an extensive #hydrological monitoring program in Chile. An avalanche occurred in the region, resulting in a Barologger being buried in the debris. After the Barologger was recovered 100 days later, it was found to be in almost perfect physical condition, and had never stopped recording data! Read more:
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When selecting the proper #Levelogger for surface #water monitoring, careful consideration is required. Our Technical Bulletin provides you with helpful tips on selecting the right instrument, as well as installation method:
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Solinst Proud to Support Water For Life's Well Drilling Efforts in Haiti

Water For Life in #Haiti is a non-profit organization that has been providing safe #freshwater supplies to rural communities for over 30 years.

To date, over 1700 working wells have been drilled in southern Haiti, supplying clean drinking water and water for raising livestock. In addition, six irrigation #wells have been installed to help support local agricultural efforts.

#Water For Life oversees the maintenance of each well; they also provide training to locals to assist in the operation and service of the well pumps. Currently, they have two drilling teams and two pump teams.

Recently, #Solinst donated three Model 102 Water Level Meters to help with their well drilling and pump installation projects.

These #WaterLevelMeters were first used in the village of Malette, Camp Perrin Haiti. Previously in this community, children and women had the tough task of supplying water to the village. They would walk an hour to nearby mountains to gather freshwater.

Now, Water For Life has installed a drinking water well right in the village. Solinst Water Level Meters were used to monitor water levels during installation and helped ensure the proper placement of the hand pump.

Thanks to Water For Life, the new well provides potable water and will help “protect against the deadly waterborne diseases and allow children to spend more time getting an education.”

Solinst thanks Vadna Georges and Leon Miller for providing information about this project.
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Can Multilevel Groundwater Monitoring Really be Inexpensive and Simple? The answer is yes – especially if you use a Solinst CMT Multilevel Groundwater Monitoring System. CMT Systems are low cost, quickly installed, and are easily customized to suit your multilevel groundwater and soil gas monitoring needs:
#solinst #cmtsystem #multilevelsystem #multilevelmonitoring #hrsc #groundwater #sitecharacterization
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