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Category: Automated Controllers

BECSys3 water chemistry controls provide continuous monitoring and control of sanitizers and pH in a simple-to-use configuration. A large-character, backlit 2 line by 20 character LCD displays current status and alarms in a high-visibility, easy-to-read format.

The controller has an optional free chlorine sensor, which can be selected for sanitizer feed control rather than ORP. If using ORP, a derived chlorine ppm display is also available, which provides an approximation of the residiual chlorine level on a 0.2 to 16 ppm scale. The BECSys3 can also be configured without a PPM scale, displaying only the pH and the ORP readings only. Operational settings are password-protected for system security.

With the Communications option connectivity features include the BECSys Live! online web portal, BECSys Now! App for iPhone/iPad and Android smartphones/tablets, Email and Text Message Alarm Notifications and BECSys for Windows PC software. The EZConnect system is also included with the Communications option, offering simple and secure remote access as an alternative to traditional IT-intensive remote access techniques, and EZMail provides email notification delivery without the need for local email server configuration.

Every controller comes complete with either pH and ORP sensors or pH, free chlorine and temperature sensors, flow switch, machined flow cell, and factory-trained start-up and support provided by local distribution in most regions.

The BECSys3 flow cell can be pre-assembled at the factory and mounted with the controller on a back panel for convenient installation. In this configuration a lightweight PVC mounting frame is easily leveled and installed on the wall. The back panel assembly is then hung on the mounting frame through 4 teardrop holes. Tighten the four bolts, make plumbing and electrical connections and installation is complete.



Control Options

  • Suitable for gas chlorine, sodium and calcium hypochlorite, bromine, and ozone applications
  • Dual Setpoint Booster Mode (DSBM) – Provides configurable alternate setpoint for a secondary sanitizer feed, especially useful in controlling salt-chlorine generation systems
  • pH control output configurable as feed-up, feed-down, or dual control
  • Feed outputs configurable as ON/OFF or Time-Based Proportional
  • Configurable failsafe overfeed timers (0-240 minutes through menu)

System Security

  • Two levels of security access codes – Operator and Rep

System Inputs

  • BECSys pH and ORP sensors featuring inorganic electrolyte for extended sensor life
  • Optional RTD temperature sensor
  • Optional Free Chlorine sensor

Integral Communications (Data-Logging and Remote Access)

  • Standard integral RS-485 serial communications port
  • Optional Integral Communications
    • integral 100 BaseT Ethernet and USB Ports, with data logging
    • 100 BaseT Ethernet provides remote access, historical data logs and email/text message alarm notification for up to 31 BECSys3’s connected via RS-485 port
    • USB Port allows quick download of data logs to a USB flash drive, for later upload into BECSys for Windows.
    • BECSys for WindowsTM compatible (included with Communications option)

External Data-Logging and Remote Access

  • Optional BECSysRCM Remote Communications module, provides remote access, historical data logs and email/text message alarm notification for up to 32 connected BECSys3’s
  • BECSys for WindowsTM compatible (included with BECSysRCM)


  • Large character 2 line x 20 character front panel backlit LCD display
  • Front panel available with derived chlorine ppm level light bar (2 options)
    • 0.2 to 16.0 ppm (with field-configurable high and low ppm Indicator LEDs
    • No ppm scale
  • Display language is field programmable (English, Spanish, French)
  • pH feed and chlorine/bromine feed status indicator LEDs

Flow Cell

  • Round PVC flow cell with pressure gauge, sample tap, and two ball valves for cell isolation (standard)
  • Feed-through (rectangular) Teflon flow cell with pressure gauge, sample tap and two ball valve for cell isolation
  • Two flow switch options:
    • Reed flow switch (standard)
    • Rotary flow switch with inline check-valve

Back Panel

  • The BECSys3 can be optionally ordered with the flow cell pre-assembled and mounted on a durable PVC backpanel.
  • A lightweight PVC mounting frame allows for easy installation as well as a space behind the back panel to run cables and wires, making for an easy and professional-looking installation.
  • Warranty
  • 5 years electronics, 2 years sensors

Regulatory Approvals

  • NSF:          NSF Certified and Listed to NSF/ANSI Standard 50
  • USA:          ETL Listed ANSI/UL 61010-1
  • Canada:      ETL Listed CAN/CSA C22.2 #61010-1
  • Europe/CE: CENELEC EN 61010-1
                    European Community Low Voltage Directive 73/23/EEC
  • Electromagnetic compatibility
    • FCC part 15 sub part B: Radio frequency devices, unintentional radiators
    • EN 61326: EMC requirements for measurement and control equipment
    • European Community EMC Directive 89/336/EEC


  • 5 years electronics; 2 years pH, ORP and temperature sensors; 1 year optional sensors and flow cell

Tags: BECSys3, BECSys3 water chemistry controller, BECSys3 water controller, BECSys3 water system

About AES

Aquatic Environmental Systems was founded in 1983 to be a resource for swimming pool and water treatment professionals in the Southwest.  From a desk and a telephone in a walk-in closet, we have grown into over 6,000 square feet of space, eleven employees and five service vehicles in Arizona and New Mexico.  This has enabled us to better serve a diverse group of professionals in the water treatment and recreational water community in Arizona, New Mexico, El Paso and West Texas.

Employing the latest in proven technology, we are able to offer solutions for virtually all of the aquatic recreation and water treatment needs of our partners.

With the over 90 years of combined experience of our staff, you can be confident that we will provide solutions that are in your best interests.