How Much to Purge?

A modeling approach to purge volume guesstimation A novel approach to determine an optimum groundwater purging and sampling strategy was published last year in the Journal of Hydrology (Qi et al, 2017). This paper uses a numerical model to estimate the “representativeness” of the groundwater sample at different purge times. The model was tested against … Continued

ORP Field Measurements Reporting Redox Potential (Eh) Correctly

Many practitioners are familiar with using multiparameter water quality meters in the field which incorporate ORP (oxygen-reduction potential) sensors. But ORP measurements are often reported from field probe measurements without the necessary conversion made to standardize readings to a common reference. Most manufacturers, including In-Situ, use a silver/silver chloride (Ag/AgCl) electrode in potassium chloride (KCl) … Continued

It’s Battelle Chlorinated Conference Time!

Join us in Palm Springs, April 8-12 at booth 110/112 where we’ll be featuring all the latest characterization, sampling, remote monitoring and cloud-based data management and monitoring solutions to help optimize every phase of your site cleanup. And while you’re there, sign up to win a Water Level Meter 200 in our raffle. We’re also … Continued

Now Entering the Mobile Era: The Aqua TROLL® 500

FORT COLLINS, COLORADO, March 21, 2018   We’re pleased to share with you the launch of our new Aqua TROLL® 500, a cost-effective multiprobe ideal for both spot checks and long-term monitoring. This wireless-enabled instrument streamlines data collection, saving hours in the field while delivering more reliable data. “Our goal with the Aqua TROLL 500 … Continued

Planning for Groundwater Level Monitoring in Bangladesh

Trialling a new Bluetooth communication system with dataloggers My last blog on the work of Groundwater Relief (www.groundwater-relief.org ) in Bangladesh generated considerable interest. So, here’s an update along with some observations on new equipment for downloading data from water level logging devices. Planning and training As well as returning to Bangladesh in mid-January to … Continued

Siting and Testing of Boreholes in Bangladesh

Groundwater Relief assess water supplies for Rohingya Refugee Camps During November 2017 Groundwater Relief sent two hydrogeologists to Cox’s Bazaar, Bangladesh to support the International Organization for Migration (IOM) to carry out a preliminary assessment of groundwater availability at two refugee camps (Leda and Kutupalong). Groundwater Relief (www.groundwater-relief.org ) were mobilized at short notice and, … Continued

Otherworldly Fumarole Caves No Match for In-Situ CTD Logger

Aqua TROLL 200 Yields Valuable Data to Improve Understanding of Mt. Rainier Micro-Climates After working with In-Situ customers for more than two decades, I’ve come across a lot of interesting use cases and deployment challenges. These sometimes-extreme environments can put even the most durable instrument designs and performance to the test. I came across one … Continued

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