Hayward Omnilogic Sense and Dispense - HL-CHEM

Hayward HL-CHEM Sense and Dispense Kit

The Hayward HL-CHEM Sense and Dispense is an ORP and pH sensing kit that adds water chemistry monitoring to compatible Hayward OmniLogic® and OmniHub pool automation controls.

The HL-CHEM continuously tests the pool's sanitization and pH levels. The connected control uses those readings to control compatible chlorine-generation and pH-dispensing equipment. The sensing kit does not generate chlorine or dispense pH reducer on its own; additional equipment is required.

The kit includes two pigtails (120 VAC and 240 VAC) for connecting a pH-reducing device that uses a line cord receptacle, such as a peristaltic pump or solenoid valve (not included). For easy integration, Hayward offers the AQL-CHEM2 (120 VAC) and AQL-CHEM2-240 (240 VAC) CO2 dispense kits. They plug into the pigtail and lower the pool's pH by injecting CO2 into the water.

What's Included

• Professional-grade ORP probe: Samples water from the filtration system and reports oxidation-reduction potential (redox) to the control. ORP measures sanitizer activity and bacteriological water quality rather than chemical residual levels. Hayward describes this measurement as not being fooled by pH, TDS (total dissolved solids) and other factors when assessing chlorine effectiveness and water quality.
• Professional-grade pH probe: Samples water from the filtration system and reports its acidity to the control. When paired with a Hayward AQL-CHEM2 or another pH dispensing device, the control can keep the pool's pH balanced.
• Probe cell: Holds both probes and provides a location for water collection and testing. Two hoses connect it to the supply and return sides of the filtration system. Mount it directly on the OmniLogic, or remotely within reach of the probe wiring. OmniHub requires remote mounting.
• pH dispense pigtails: Plug-in receptacles for the AQL-CHEM2, AQL-CHEM2-240 or other pH dispensing devices, such as peristaltic pumps and solenoid valves, controlled by OmniLogic or OmniHub.
• Installation hardware: Tubing, tubing connectors and mounting hardware needed to complete installation.

Compatibility and Required Equipment

• Compatible with Hayward OmniLogic and OmniHub pool controls using the latest firmware revisions.
• For automatic chlorine generation with OmniLogic, Hayward specifies an AQL-CL chemistry kit consisting of an electrolytic cell and flow switch.
• For automatic chlorine generation with OmniHub, a Hayward AquaRite chlorine generator must be installed, connected to and controlled by OmniHub.
• A separate compatible pH dispensing device is required to lower pH automatically.