The AS950 sampler controller from Hach Company features a full-color, 2 1/2- by 3-inch display for intuitive, single-screen programming, USB drive compatibility, error alert and status screen to simplify troubleshooting in wastewater treatment.

Single-screen programming eliminates the need for scrolling through the menu, says Jamie English, product manager, Hach Company.
“The other benefit is the status screen,” she says. “If you want to know what’s going on with the sampler — has it missed any samples, when’s the next program going to start — all you have to do is hit the status button and all that information comes up.”

Logged data such as sample history, cabinet temperature and sensor measurements can be downloaded directly from multiple samplers onto a USB drive, eliminating the need for special cables or having to carry a laptop to sampling locations in inclement weather.

The USB port also enables users with multiple samplers to program one sampler, download the settings to a flash drive and upload it to the next controller, eliminating the need to reprogram each sampler.

“It saves a lot of time when you have the same program on multiple samplers,” she says.

The AS950 works with existing Hach sampler bases and bottle configurations. It includes connections for several digital Hach sensors, enabling pH samples to be taken at the discharge site or when levels reach designated setpoints. Digital sensors can also measure rate of flow.

The high-speed, dual-roller sample pump has a 3/8-inch I.D. by 5/8-inch O.D. pump tube and flow rate of 1.25 gpm at 3 feet vertical lift. Sample intervals can be set in single increments from 1 to 9,999 flow pulses or 1 to 9,999 mins in one-minute increments.

The memory stores up to 4,000 history entries for sample time stamp, bottle number and sample status, up to 325,000 entries for selected measurement channels and 2,000 events.

Optional IO9000 input/output modules can be used to set up relays and alarms that can be set for system diagnostics and logging, such as program end, sample complete, missed sample and full bottle.

The compact, portable sampler, designed for use in 18-inch manholes, can also be used to measure stormwater runoff and pretreatment by industrial users to ensure permit requirements are being met. 800/227-4224; www.hach.com.