ATI’s Model Q46HChlorine Monitor

ATI’s Model Q46HChlorine Monitor is an upgraded version of our proven Q45

system for continuous monitoring of free or combined chlorine. Monitor capabilities have been expanded to include options for a 3rd analog output, or for adding additional low power relay outputs.

The Q46H system uses a polarographic membraned sensor to measure chlorine

directly, without the need for chemical reagents. When needed, automatic pH

compensation may be added for highest free chlorine measurement accuracy, and

systems are available to provide 4-20 mA outputs for chlorine, pH, and temperature

to allow easy CT calculations.

Q46H systems are economical to purchase, economical to maintain, and provide

long term accuracy and reliability for your chlorine monitoring needs.

ATI can supply the Q46 complete with sample flow controls mounted to a PVC

back plate ready to mount. Connect power, water sample, and analog/relay

outputs and your ready to go. Systems are available with or without a flow switch

for remote indication of loss of sample

Two types of chlorine sensors are available, one designed for flow cell installation and one for submersion applications. Free chlorine monitoring should always be done using a flow cell system. Good control of sample flow and pressure is important for accurate measurement, and the standard constant-head flow cell should be used for most applications. A sealed flowcell and a low-volume flow cell are also available for special applications. Consult your ATI representative for application assistance.

Submersible combined chlorine sensors can sometimes be used for measuring total chlorine in waste water effluent. Waste water effluents containing more than 1 PPM of ammonia often result in a chlorine residual that is more than 90% monochloramine. Direct measurement with a submersible sensor can provide a dependable monitor without all the sampling and chemicals associated with total

chlorine measurement.

Chlorine sensors, especially free chlorine, require up to 8 hours of stabilization time when first installed or after membrane change. ATI offers a battery powered “polarizer” that can be used to stabilize a spare sensor so it is ready to run within a few minutes of installation. Polarizers simply plug into the sensor connector and require no adjustments.