Model 1520e pH Controller

Get precise, automated pH control in a simple package. Minimize on site time and costs with this simple and easy to set up pH controller.
Lakewood Instruments 1530e Controller closeup

In some cooling towers, condensate and process applications, you want precise, automated pH control.

The Model 1520e pH controller does that and so much more in a simple, easy to set up package. Minimize your onsite time and costs and maintain excellent control of your system by ordering Lakewood Instrument’s automatic ph controller today!


Model 1520e pH Controller Overview

  • Four output relays to add acid or base, control valves, and add additional chemicals. 
  • Schedule up to twelve scheduled chemical feed schedules on a schedule that you set to match the system performance you seek, giving you excellent control of your system.
  • Chemical feed relays can be configured just how you want them – for setpoint control, based on water meter, percent of blowdown, percent of time, or on a scheduled feed basis. 
  • 4-20mA output to send an analog signal of the pH of the system to an external receiver (BMS or another system.)
  • Process inputs include up to two water meters, two drum switch inputs, pH, flow switch input, and a 4-20 mA input which could be used for remote pH control or other input.

Want to Go to the Next Level?

Pair your 1520e with Lakewood’s OnSight Remote Access System to get remote monitoring capability including data logs and graphs from anywhere, anytime. The OnSight System gives your customers peace of mind that you are on top of water treatment, even if they don’t want you on their site.

Lakewood Instruments has all the pH probes for your system.

From sample line locations to remotely located probes using signal transmitters, we can get your information from your system to the controller, giving you peace of mind. With pH probes for cooling water, condensate, and process/waste applications, we can help you with all your pH control needs. 

Product Documentation

Product Specifications

  • Type: Model 1520e
  • Includes: Optional sensor and plumbing configurations
  • Output Relays: 3 selectable use and 1 blowdown relay
  • Flow Switch: Flow switch input
  • Water Meter: 2 water meter (contact head, paddle wheel or turbine) inputs
  • Analog Input: 1 non-isolated internally powered 4-20 mA input
  • Output Signal: 1 isolated or non-isolated optionally powered 4-20 mA output for conductivity
  • Mounting plate: Optional mounting plate
  • Drum Switch: 2 digital contact drum switch inputs
  • Temperature Compensation: 500 NTC, None
  • Ambient Temperature: 32° – 120° F (0° – 49° C)
  • Sensor Type: 2 electrode conductivity sensor
  • Conductivity Resolution: ± 10 μS (conductivity <5000 μS), ±100 μS (conductivity >5000 μS)
  • Accuracy & Repeatability: ± 1.0%
  • Deadband/Setpoint: Programmable
  • Enclosure: NEMA 4X, ETL
  • Timer: Max. blowdown time exceeded, relay time exceeded
  • Power: 120/240 VAC 50/60 Hz
  • Relay Ratings: 3A each, 10A total
  • Usage: Water treatment conductivity, pH or ORP control

Have questions? Get in touch with us!