PC2100A Programmable Controller

6-relay controller designed for Australian conditions

Suitable for: Commercial pools and spas, hydro pools & swim schools

The PC2100A programmable controller has been designed with Australian conditions in mind, with 6 relay output channels to control pH and sanitizer. Free and total chlorine (ppm) control with combined chlorine monitoring, ORP for sanitizer reference and oxidizer control backup, pH, TDS and temperature. 

The PC2100A controller has also heating and main filter pump control, with a built-in remote monitoring that allows you to monitor your facility from a web browser or any mobile device. It has a user-friendly interface, allowing convenient programming and control of all your installed equipment.


Key features of the PC2100A controller include: 

Remote access: You can control and monitor your pool or spa via our app, from anywhere at any time – using a computer, tablet or mobile device.

pH control: a choice of acid/co2 or base feed. Dedicated setpoint and relay output for both co2 & Acid.

PPM boost: primary and secondary sanitiser setpoints with dedicated relay outputs.

Programmable super-chlorination + chemical savings cycles: The PC2100A can be programmed to automatically perform super-chlorination cycles to shock your pool or spa, or to reduce the amount of chemicals you use by scheduling chemical feed cycles during off-peak hours.

Display of the Langelier Saturation Index: The Langelier Saturation Index is a measure of the potential for scale or corrosion to form in your pool or spa. The PC2100A can display the Langelier Saturation Index so you can easily monitor the condition of your water.

5 Year warranty: The PC2100A is backed by a 5-year warranty, which is industry-leading cover for your peace of mind.

Hassle-free installation: Everything is mounted onto a customised manifold ready for connection.


Enquire now: sales@chemtrol.com.au

Or call us on: 1300 585 820

Chemical Automation includes Free & Total chlorine level (ppm), pH, ORP and TDS

Control Relay Output6x control relay outputs enabling precise automation of water chemistry with a comprehensive range of monitoring and control functions designed specifically for pools and spas
Chlorine Control (PPM)Free and Total chlorine sensors with combined monitoring and display. 0 to 10 ppm with direct reading in PPM or mg/l
PPM boost: primary and secondary sanitiser setpoints with dedicated relay outputs
pH ControlA choice of acid/co2 or base feed, 0 to 14. Dedicated setpoint and relay output for both co2 & Acid
ORP ControlORP monitoring for sanitizer reference and oxidizer control backup
200 to 999 mV, Set-point for oxidizer or reducer
TDS ControlSalt level monitoring for chlorinators
0 to 20,000 mg/l with optional dump valve
Heating ControlHeating control with temperature monitoring and display
Temperature from -18 to 60 C
Filter Pump ControlMain recirculation pump control: manual, automatic, daily schedule program & timer
Flow ControlFlow monitoring & totalizer with electronic sensor and adjustable alarms
Shock TreatmentProgrammable super chlorination & Chemical saving cycles
Langelier IndexCalculated from pH, Temp, Total Alkalinity and Calcium Hardness.
Water Balance display
Sensor Calibration1, 2 or 3 points
Control ModesOff, Manual, Automatic, Timer, ON/OFF or Proportional Feed
Automatic Data LoggingMicro SD card for easy program updates and automatic data logging
LCD DisplayLarge 8-line LCD DISPLAY for easy operation
Remote AlarmHigh/low, out-of-range, run time and overfeed
Visual, audio and external alarms
Flow Cell AssemblyFlow Cell Assembly (FCA) designed specifically for pool and spa applications with safety flow switch
Patented Probe Alert SafeguardDynamic probe testing with sensor failure warning
Mechanical34 x 29 x 17 cm, Rain and splatter proof NEMA type 4x Cabinet
Electrical10A 110/230 V with selector switch, all output and alarm relays 5A
ApprovalsUL, NSF 50 and CSA Approved
WarrantyController: 5-year electronics warranty
Sensors: 2-year warranty

Options available

  • FLOW: Flow monitoring & totalizer with electronic sensor and adjustable alarms.
  • ETHCOM: CHEMTROL® web-server communication – remote monitoring and control with identical duplicate screens technology
  • 420M: 4-20mA signal (4-channels) for monitoring display outputs.
  • BMS: Modbus/BACnet protocol communication for Building Management Systems.

PC2100A Installation 

We want to make the installation of CHEMTROL® controllers as simple as possible. This is why we have everything mounted onto a customised assembly manifold ready for connection. This assures proper water sampling around the sensors and makes for a hassle free installation that minimises the integration work needed to get your water treatment system up and running.


PC2100A – Bypass line assembly

Dual ppm control with integrated pH, ORP, TDS and Temperature

Seamless controller setup: Choose between hardwired dosing pumps or General Purpose Outlets (GPOs) for easy dosing equipment connection.

Our Flow Cell Assembly (FCA) features 2 clear acrylic flow cells for Chlorine sensors (ppm), 2 flow control valves, a water sample valve, safety flow switch, and probes holder fitting.

The Controller assembly comprises a grey PVC backboard (600×400 mm), while the By-pass line assembly measures (600×500 mm).


PC2100A Operation

The CHEMTROL® Programmable Controller range provides comprehensive control and monitoring capabilities through its user-friendly interface. Here’s a breakdown of its key features:

Main Display Screen: The main screen offers direct access to all menus and submenus, allowing easy navigation using the four directional arrow keys and a ten-key keypad for numerical settings.

SANITIZER MENU: Used for controlling chlorine or bromine levels with an amperometric sensor. This menu allows the selection of control mode, sensor calibration setpoint level, and high and low alarms. Additionally, it displays runtime information and enables manual or scheduled super chlorination treatments.

pH MENU: Similar to the SANITIZER MENU, this menu selects pH control parameters using acid or base feed. It also includes an Acid Wash program for periodic sensor maintenance.

ORP MENU: This menu allows for the selection of control mode, sensor calibration, setpoint level, high and low alarms, shocking, and chemical saver programs related to Oxidation-Reduction Potential (ORP). It also displays run time information and enables manual or scheduled super chlorination treatments treatments.

SATURATION and WATER BALANCE: Ensures proper control of saturation and water balance to maintain water quality and prevent scaling or corrosive conditions.

TDS MENU: Sets automatic dumping of water when dissolved solid concentrations are high. It includes options for Conductivity or TDS control setpoints to activate the dump valve.

Langelier Index: Calculates the saturation condition based on pH, Temperature, Alkalinity, and Calcium Hardness. Constantly displayed on the Main Screen, it alerts to potential scaling or corrosive conditions.

TEMPERATURE / HEATER CONTROL: Displays temperature sensor readings and controls the heater. The TEMPERATURE MENU allows setting the heater control to Manual or Automatic with a programmable seven-day schedule.

PUMP AND FILTER CONTROL: Provides manual or programmable operation of the main recirculation pump and backwashing cycle, ensuring efficient filtration and protection of the heater.

SETUP MENU: Allows modification of configuration parameters for initialization, operations, and communications, providing flexibility to adapt to changing needs.

The CHEMTROL® Programmable Controller range stands as a powerful and versatile solution for effectively managing water quality in commercial facilities. With advanced control and customization options, it provides a comprehensive and adaptable system for precise water quality management.

Find out more: Control Proficiency


Remote Monitoring & Control

Our range of programmable controllers all have remote access capability, so you can control and monitor your facility 24/7.

With the remote operation function any number of facilities can be controlled and monitored from your computer, or via our mobile App. From a computer simply login directly via your browser using our web-server where the controller display is mirrored on your computer.

True duplex operation that allows real-time control and troubleshooting of all operating functions, including status reports, trend graphs and automatic alerts by email or text messages. You can also access and control your controller via our dedicated app, available for Android and Apple devices.

In terms of connecting your controller, this can be achieved via a wired Ethernet cable, WIFI signal, or by using a wireless connection with a compatible 4G or 5G router.

Find out more: web-access options.