Chemtrol CH250IQ ORP/pH Digital Controller Package Mounted on Backboard

The Chemtrol® CH250 ORP/pH Digital Controller is a reliable, easy-to-use solution for maintaining clean, safe, and properly balanced water in pools, spas, and light commercial water systems. Designed with dual microprocessor-based channels, the CH250 continuously monitors and adjusts sanitizer (ORP) and pH levels to user-defined setpoints using automatic, manual, or proportional feed modes.

This model includes a platinum ORP sensor, glass pH sensor, both with 10 ft (3 m) cables, a rotary paddle flow switch for chemical feed interlock, round flow cell and all factory mounted on a backboard assembly. The waterproof polystyrene enclosure features intuitive controls and a clear LED readout panel, making operation and troubleshooting simple. It also features exclusive safety and easy reset functions not found on typical controllers.

The CH250 is ideal for hotels, motels, condos, clubs, and residential pools. With a 5-year electronics warranty and decades of proven field performance, it’s a cost-effective choice that pays for itself quickly in chemical savings, equipment protection, and reduced labor.

Key Features

✔ Dual-channel control for ORP and pH
✔ Includes platinum ORP sensor and glass pH sensor (3 m cables)
✔ Paddle-style rotary flow switch included
✔ Round Flow Cell with Acrylic Face
✔ Pre-Mounted on a backboard assembly
✔ Adjustable setpoints and calibration controls
✔ Acid/base mode selector
✔ Feed control: Manual, Automatic, or Proportional
✔ Overfeed protection with independent timers
✔ Audible, visual, and remote alarm outputs
✔ LED readouts for real-time pH and ORP values
✔ Rain- and splash-proof enclosure with clear face panel
✔ UL and NSF 50 approved
✔ 5-year electronics warranty

Ideal Applications

• Hotels & Resorts

• Apartment & Condo Pools

• Clubs & Spas

• Residential pools

• Light industrial water treatment

What’s Included

• CH250 digital controller unit

• ORP sensor with 3 m (10 ft) cable (platinum electrode)

• pH sensor with 3 m (10 ft) cable (glass electrode)

• Rotary paddle flow switch

• Round Acrylic Flow Cell

• Pre-Mounted on Backboard Assembly

• Installation and operation manual

Note: Does not include flow cell, sample stream plumbing, or mounting backboard. These must be purchased separately.

Specifications

• ORP Range: 200–995 mV

• pH Range: 4.0–10.0

• Display: LED (3-digit ORP, 2-digit pH)

• Feed Modes: Manual, Automatic, Proportional

• Power Supply: 110 VAC, 230 VAC, or 24 VAC (specify when ordering)

• Cabinet Dimensions: 9″ x 7″ x 4″ (22 x 18 x 10 cm)

• Sensors:

  • ORP Sensor: Platinum electrode, 3 m cable

  • pH Sensor: Glass electrode, 3 m cable

• Flow Switch: Rotary paddle-style (included)

• Plumbing Compatibility: ½", 1½", or 2″ PVC tees

• Certifications: UL Listed, NSF 50 Approved

• Warranty:

  • 5 years on electronics

  • 1 year on sensors and other parts

Visit Chemtrol for complete information.