Hayward CAT 2000 pH and ORP controller shown on a complete package backboard; this listing is the controller and sensors onlyHayward CAT 2000 Commercial pH and ORP Controller with Sensors, No Flow Cell or Flow Switch, CAT2000CSO$2,46899
Hayward CAT 2000 pH and ORP controller shown on a complete package backboard; this listing is the controller and sensors only
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Hayward CAT 2000 Commercial pH and ORP Controller with Sensors, No Flow Cell or Flow Switch, CAT2000CSO

Ask a questionMPN CAT2000CSO
$2,46899
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Quick overview

  • Controller and sensors The CAT 2000 controller with pH and ORP sensors, without the flow cell or flow switch.
  • Feeds in proportion to demand It reads pH and ORP continuously and paces chemical feed to how far the water is from setpoint.
  • Chlorine, bromine or salt Works with all three; Hayward says to turn proportional feed off when a salt chlorinator is used.
  • Factory set at pH 7.5 and 650 mV Setpoints adjust from pH 7.0 to 8.0 and ORP 200 to 995 mV, held to 0.1 pH and 5 mV.
  • Made for the pump room A glass filled polycarbonate enclosure rated NEMA 4X, with a UV protected membrane keypad.
  • Certified to NSF/ANSI 50 The standard for commercial pool and spa equipment.
Full description and specifications ↓

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Product details

The Hayward CAT2000CSO is the CAT 2000 commercial water chemistry controller with its pH and ORP sensors, supplied without the flow cell or flow switch. It monitors pH and sanitizer activity around the clock and feeds acid or base and sanitizer in proportion to demand.

What is in this package

The controller and the pH and ORP sensors. The flow cell and flow switch that come in Hayward's complete CAT 2000 packages are not included, which suits a facility replacing a controller on an existing installation. Hayward treats the flow sensor as required, so the controller must be wired to one before it is put into service.

How it controls the water

The controller comes set to pH 7.5 and ORP 650 mV. ORP measures how active the sanitizer is rather than how much of it is present, and the controller paces feed to the gap between each reading and its setpoint. High and low alarms, overfeed timers, a pH interlock and an optional pH priority guard against feeding into bad water.

Where it fits

It works with chlorine, bromine and salt systems, has a chlorine generation interface and a remote alarm relay, and reports through an RS232 serial port. The enclosure is glass filled polycarbonate rated NEMA 4X, and the controller is certified to NSF/ANSI 50.

Specifications
Brand Hayward
Manufacturer part number CAT2000CSO
UPC 610377362566
Series CAT 2000
Type pH and ORP chemical controller
Included Controller, pH sensor, ORP sensor
Not included Flow cell, flow switch
Pool type Commercial
Sanitizer Chlorine, bromine or salt
pH setpoint range 7.0 to 8.0
ORP setpoint range 200 to 995 mV
Control accuracy pH +/- 0.1, ORP +/- 5 mV
Display range pH 1.0 to 9.9, ORP 5 to 995 mV
Power input 120 VAC, 60 Hz, 15 A
Output relays pH and ORP, 4 A at 120 or 230 VAC
Communications RS232 serial, remote alarm relay
Enclosure 7.25 x 8.25 x 2.63 in, glass filled polycarbonate
Ratings NEMA 1, 4, 4X, 6, 12, 13
Certification NSF/ANSI 50
Shipping weight 12 lb

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Questions and answers

What people ask about this product, answered by our pool techs.

Does the CAT2000CSO come with a flow cell and flow sensor?
No. It is the CAT 2000 controller with its pH and ORP sensors. Hayward calls the flow sensor required: it tells the controller to stop feeding when the filter pump is off or flow is low, and the manual says never to run the controller without a flow sensor, power interlock or other way to stop feed. Reuse the flow cell and sensor already installed, or add them.
What pH and ORP does the CAT 2000 hold out of the box?
Hayward sets it at pH 7.5 and ORP 650 mV at the factory. The pH setpoint adjusts from 7.0 to 8.0 and the ORP setpoint from 200 to 995 mV, and the controller holds them to within 0.1 pH and 5 mV.
Can the CAT 2000 control a salt chlorine generator?
Yes. It has a chlorine generation interface output and works with salt systems as well as chlorine and bromine feeders. Hayward's manual says to disable proportional feed when the controller runs a salt chlorine system.
What does pH priority do on the CAT 2000?
With pH priority on, the controller holds back sanitizer feed whenever pH is more than 0.2 away from its setpoint, so at a 7.5 setpoint ORP feed runs only between 7.3 and 7.7. It is off by default.
Does an automated controller replace manual water testing?
No. Hayward's manual says to keep taking and recording manual water chemistry readings as your Health Department requires. The controller is an aid to those readings, not a substitute for an accurate test kit.
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