Monitoring water quality parameters at remote locations in potable water systems can present a challenge to those responsible for insuring safe drinking water.  This is especially true for chlorine residual measurements, which is an essential parameter in maintaining high quality drinking water at the consumer's tap.  Continuous monitoring instruments for free chlorine or combined chlorine have simply not been available in a convenient package designed for remote deployment.

ATI has developed an instrument to fill this need.  Our Series PQ45 is a portable monitoring system that can be set up quickly and easily in almost any location to provide short term data on residual chlorine, and can also include pH measurement in the same package.  Mounted in a sealed and lockable case, this monitor will operate for up to 30 days from two C-cell alkaline batteries, recording chlorine and pH data in an on-board data logger.  Software supplied with the system provides for easy download to a laptop computer for later analysis.

While distribution system monitoring for chlorine and pH are the most widely used version of this package, PQ45 systems are also available for DISSOLVED OZONE, RESIDUAL CHLORINE DIOXIDE, DISSOLVED OXYGEN, OR CONDUCTIVITY.  The same rugged and reliable package will allow easy deployment in whatever monitoring environment is required by your application.  All that's necessary is a sample line and a drain.  Connections are made through self-sealing fittings that isolate the flow as soon as they are disconnected.  In addition, all flow and pressure controls are build into the monitor so external requirements are minimal.

PQ45 Monitoring Systems can also be used for remote solar powered installations.  Instead of using internal batteries, the system can operate from external power supplies from 5-17 VDC.  With a current draw of less than 10 mA, even a small solar power system can operate the system with power left over for data transmission equipment.  For almost any remote monitoring application, the PQ45 system provides a convenient and reliable solution.

A complete portable monitoring system housed in a durable carrying case shall be supplied to continuously measure and record (Specify Free Chlorine, Combined Clorine, Chlorine Dioxide, Dissolved Ozone, or Dissolved Oxygen) . Each Portable Monitor shall consist of a battery powered monitor mounted in a weatherproof case. Along with the monitor shall be a constant-flow control system, sensor, and flow cell assemblies suitable for operation at remote sites where power is not available.

An optional pH sensor and flowcell shall be supplied on systems designed for either Free Chlorine, Combined Chlorine, Dissolved Ozone, or Residual Chlorine Dioxide. This second sensor input shall allow pH data to be logged in addition to the primary measurement.

The monitoring system shall contain quick-disconnect sample and drain fittings on the side of the case. Fitting shall contain shut-off valves that automatically stop flow within the flow system when external sample and drain lines are disconnected. Mating fittings for customer use in external connections shall be supplied, along with 20 feet of sample tubing and fitting for adapting to user piping systems.

The monitoring system electronics and sensor/flowcell systems shall be mounted on a hinged panel inside the case. The hinged panel will allow easy access for service of sensor components, while maintaining a compact internal assembly. The constant-flow control components shall also be mounted on the hinged panel, and the y-strainer that protects the system from large particles shall be easily accessible for cleaning.

Power for the electronic monitor shall be supplied by 2 internal C-cell alkaline batteries. The batteries shall be sufficient to operate the monitor for about 30 days continuously. The monitor shall automatically shut down when the battery voltage falls below that required to maintain reliable mesurements. A low-battery indicator on the display shall provide a warning when battery voltage is approaching the shut-off point.

A stand-alone data logger shall be incorporated into the system, with plug-in cables connecting the monitor to the logger. The logger shall store up to 42,000 data point at intervals programmed by the user. The logger shall be read through a standard PC using a USB interface cable supplied with the unit. Software for operation of the logger shall also be supplied.

OPTIONAL: The portable monitoring system shall be supplied for operation off of an external power source from 5-17 VDC. The two analog 0-2.5 V outputs shall be wired for external connection as well to allow easy interface to customer equipment. A quick-disconnect cable assembly shall provide external wiring for both power and outputs. No internal battery components are supplied when the external connection option is provided.

The complete Monitor shall be Series PQ45 as manufactured by Analytical Technology, Inc.