Campbell Scientific's water quality systems for unattended, long-term monitoring provide unmatched versatility and reliability. Our systems measure water quality in many natural and industrial environments including streams, watersheds, wells, caves, water / wastewater treatment plants, aquaculture operations, landfills, mine sites and processing plants. Key components of our systems include data loggers, sensors, water samplers and communications peripherals, which are customised for each application.
Our data loggers feature wide operating temperature ranges, low power consumption, and the ability to directly interface with a large variety of water quality sensors. Because our data loggers operate on batteries (with or without solar panels), they are ideal for long-term, stand-alone operation, such as at remote streams, boreholes or wells. Most of our data loggers are expandable using multiplexers and other peripherals. Data are typically displayed and stored in the desired units of measure (e.g., specific conductance as mS/m, µS/cm, Ohms).
Powerful on-board instruction sets allow unattended control decisions based on time or conditional events. For example, if measured water quality levels are outside a predetermined range, the data logger can actuate water samplers, sound alarms, open valves, actuate injectors, and make a phone call to report conditions. The data loggers can easily provide the necessary water sampler control to meet EPA-mandated first-flush and follow-up sample schedules. All data is time-stamped and data from event-triggered samples is marked for later analysis.
Almost any sensor, individual or multi-parameter, may be used with the system, allowing the system to be customised for each application. We helped create the original SDI-12 standard, so you can be sure our systems are SDI-12 compatible. In addition, nearly all available flow, level, and meteorological sensors can be measured, generally without external signal conditioning.
Water Quality Samplers
We offer both portable and stationary automatic water samplers for storm water, waste water, or other water quality applications. These water sampling systems use external vacuum pumps to draw water through intake tubing, instead of the traditional peristaltic pumps that induce flow by squeezing flexible tubing. Advantages of the vacuum pump method include faster water sampling rates, better vertical lifts, longer sampling distances, and less maintenance. Because the vacuum method disturbs the water samples less, they better represent the original water solution, especially if the solution has high concentrations of suspended solids.
The availability of multiple telecommunications and on-site options for retrieving data also allows systems to be customised to meet exact needs. Options include: voice-synthesized phone, telephone, mobile, satellite, radio, ethernet, short haul, meteor burst, coaxial cable, and storage module. Systems can be programmed to send alarms or report site conditions by calling out to computers, phones, radios, or pagers. Real-time or historical data can be displayed or processed with Campbell Scientific software. Data can also be exported as ASCII files for further processing by spreadsheets, databases, or analysis programs.