Receive the most efficient use of costly chemicals and reagents with the advanced control functions of the pH 2000 PI controller. This controller offers sophisticated operating features in a rugged housing suitable for wall, panel or pipe mounting.

Select from several control types: on/off control, proportional pulse length, proportional pulse frequency or PI (proportional integral) control. Proportional integral control lets you fine-tune controller to prevent overshoot and provide tight control.

Control Features:

• Programmable for on/off, proportional, or PI (proportional integral) control—ideal for the most demanding process applications
• Two programmable relay outputs plus separate alarm relay
• Separate electrode wash contact relay to control electrode cleaning systems
• Hold feature lets you connect flow or level switches to protect your pump
• Separately adjustable high and low set point hysteresis bands prevent rapid contact switching near set points

Advanced Functions:

• Symmetrical mode operation eliminates electrical noise problems when used with solution ground
• Two galvanically isolated, scalable 0-20/4-20 mA outputs for pH/ORP and temperature
• Push button two-point calibration and online electrode offset adjustment
• Two level password protection prevents tampering with settings

Physical Features:

• Universal power supply input from 80 to 250 V ac/dc allows use at multiple sites and in areas with fluctuating voltage
• Backlit display offers easy reading in low-light conditions
• Large dual LCD shows pH (or mV) and temperature simultaneously
• Rugged NEMA 4X housing protects your controller from the elements and dirty industrial applications
• Nonvolatile memory maintains setup if power fails