Customer Support
Poolweb Pool Automation Chemical Monitoring sku: CH250
Chemtrol 250 ORP/pH Digital Controller
  • Chemtrol 250 ORP/pH Digital Controller

Chemtrol 250 ORP/pH Digital Controller

By Chemtrol
Poolweb #CH250
Allow 5-7 Days to Ship
$1,836.92 $1,836.92
Unit price per 

Shipping Options (more information)

  • Standard Shipping, Free Get it by
  • 2 Day Shipping, Get it by
  • 1 Day Shipping, Get it by

Shopper Protection

Replacement Parts Available

Shop 32 replacement parts for this product and get it working like new!

Product Overview


The Chemtrol 250 ORP/pH Digital Controller is a microprocessor-based digital controller designed to maintain both sanitizer ORP (oxidation-reduction potential or Redox) and water pH and features adjustable set points, high and low alarms, and other features not normally found on these type of controllers. This controller is designed for affordability, simplicity of installation, ease of use and long-term reliability. This unit includes the controller, respective probes (pH probe and ORP probe), paddle wheel flow switch, and miscellaneous plumbing supplies. It is the perfect controller for small commercial facilities like apartments, condos, and motels, as well as high-end residential pools.

With all controls on the front panel, a bright LCD display shows ORP and/or pH readings, calibration adjustments and alarm limits. The five LED lights indicate the operating modes (OFF, Manual or Auto), feed status, out-of-range alarms and overfeed alarms. The front panel controls include set point, calibration, low and high alarm limits, safety timer limit and proportional feed adjustment. Feed control is either ON/OFF or Proportional. The Proportional Feed feature is particularly useful to avoid overfeeding in small bodies of water. It reduces the feed cycle time progressively as the sensor reading approaches the set point.

All CHEMTROL controllers are user-friendly, reliable and easy to install and operate. Every unit is supplied with a comprehensive operation manual and a FIVE-YEAR electronics warranty.


  • Displays ORP and pH
  • All Control Functions on Front Panel
  • Separate Adjustable Set points
  • Separate Adjustable Alarms
  • Proportional Feed with Adjustable Bandwidth
  • Acid/Base Selector
  • Separate Adjustable Overfeed Safety Timers
  • Waterproof Cabinet with Clear Window Cover
  • Easy to Install and Simple to Use
  • Includes probes
  • Does not include flow cell
  • 5-year Electronics Warranty

Technical Specifications

Poolweb Item #CH250
Cross Reference #56-560
Lead Time10 days (if out of stock)
Shipping Weight10.0 lb

Shipping & Returns

Shipping Options

Standard ShippingFreeGet it by
2 Day ShippingGet it by
1 Day ShippingGet it by

Standard ground shipments may be delivered sooner depending on where you are located, and the shipping method used to ship your order. Combining multiple items onto the same order can change the delivery date and expedited shipping costs, especially if the other items are not available for immediate shipment. Transit time is calculated in business days and does not include Saturday and Sunday.

Due to significant demand on swimming pool parts and equipment, we cannot guarantee out of stock items will be available for immediate shipment. If your order must arrive to you by a certain day, please contact us first and we will provide you with a more definitive shipping and receipt of your order.


This item can be returned within 30 days of order. See return policy for details and how to place a return.

Poolweb Guarantee

This item qualifies for a one-year guarantee. Poolweb guarantees that the item you receive will function as advertised for one year. See the Poolweb Guarantee for more details.

We Also Recommend...

Product Reviews

Customer Questions

Part Finder

Select Brand

Select Product