Looking for a quote or to discuss your needs?
You can also review the documentation for technical details and purchasing information.
PC2100 Programmable Controller
- Product Details
- Specifications
- Installation
- Operation
- Remote Control
6-relay controller designed for Australian conditions
Suitable for: Commercial pools and spas, hydro pools & swim schools
The PC2100 programmable controller has been designed with Australian conditions in mind, with 6 relay output channels to control pH and sanitiser. Free chlorine (ppm) control, ORP for sanitiser reference and oxidiser control backup, pH, TDS and temperature.
The PC2100 controller also controls heating, and remote monitoring is available as an option, so you can 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.
Need total chlorine and pump programs? See the PC2100A.
Key features of the PC2100 controller include:
Remote access (option): You can control and monitor your pool or spa via our app, from anywhere at any time – using a computer, tablet or mobile device. A one-off purchase for the life of the controller, with no ongoing fees.
pH control: a choice of acid/CO2 or base feed. Dedicated setpoint and relay output for both CO2 and acid.
PPM boost: primary and secondary sanitiser setpoints with dedicated relay outputs.
Programmable super-chlorination + chemical savings cycles: The PC2100 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 PC2100 can display the Langelier Saturation Index so you can easily monitor the condition of your water.
5-year warranty: The PC2100 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.
Chemical Automation includes free chlorine level (ppm), pH, ORP and TDS
| Control Relay Output | 6x 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 chlorine sensor. 0 to 10 ppm with direct reading in PPM or mg/l PPM boost: primary and secondary sanitiser setpoints with dedicated relay outputs |
| pH Control | A choice of acid/CO2 or base feed, 0 to 14. Dedicated setpoint and relay output for both CO2 and acid |
| ORP Control | ORP monitoring for sanitiser reference and oxidiser control backup 200 to 999 mV, setpoint for oxidiser or reducer |
| TDS Control | Salt level monitoring for chlorinators 0 to 20,000 mg/l with optional dump valve |
| Heating Control | Heating control with temperature monitoring and display Temperature from −18 to 60 °C |
| Flow Control | Flow monitoring and totaliser with adjustable alarms. Built in: add a flow sensor (OPTION FLOW). |
| Shock Treatment | Programmable super-chlorination and chemical saving cycles |
| Langelier Index | Calculated from pH, temperature, total alkalinity and calcium hardness. Water balance display |
| Sensor Calibration | 1, 2 or 3 points |
| Control Modes | Off, Manual, Automatic, Timer, ON/OFF or Proportional Feed |
| Automatic Data Logging | Readings logged automatically; download your data from any laptop through the CHEMTROL® web portal (with remote monitoring). Micro SD card for software updates and new features. |
| LCD Display | Large 8-line LCD display for easy operation |
| Alarms | High/low, out-of-range, run time and overfeed Visual, audio and external alarms |
| Flow Cell Assembly | Flow Cell Assembly (FCA) designed specifically for pool and spa applications with safety flow switch |
| Patented Probe Alert Safeguard | Dynamic probe testing with sensor failure warning |
| Mechanical | 34 x 29 x 17 cm, rain and splatter proof NEMA type 4X cabinet |
| Electrical | 10 A, 110/230 V with selector switch; all output and alarm relays 5 A |
| Approvals | UL, NSF 50 and CSA Approved |
| Warranty | Controller: 5-year electronics warranty Sensors: 2-year warranty |
Options available
- ETHCOM – remote monitoring and control through the CHEMTROL® web-server and app: the controller’s own screen on your computer, tablet or phone, with alerts by SMS, email or both. A one-off purchase for the life of the controller; connect by Ethernet cable to your network, or by a 4G or 5G router with a SIM card (the SIM’s data plan is the only subscription).
- 420M – a 4–20 mA board with four output channels, for customers who need it: sends the readings to your BMS, PLC or SCADA, or connects equipment by 4–20 mA.
- BMS – Modbus or BACnet communication with your building management system.
Built in and ready; add the sensor you need, supplied by us as part of your package:
- FLOW – a flow sensor, for flow monitoring and the totaliser
PC2100 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.
PC2100 – Bypass line assembly
Chlorine sensor (ppm) 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 a clear acrylic flow cell for the chlorine sensor (ppm), 2 flow control valves, a water sample valve, safety flow switch, and probe holder fitting.
The controller assembly comprises a grey PVC backboard (600×400 mm), while the bypass line assembly measures 600×500 mm.
CHEMTROL® PC2100 – Programmable Controller Overview
The CHEMTROL® Programmable Controller range offers advanced, user-friendly control and monitoring of all essential water quality parameters. Below is a clear breakdown of the PC2100’s key features:
Main Display Screen
Provides quick access to all menus and settings. Operators can navigate using arrow keys and enter values with the keypad — no complex training required.
Sanitiser Menu (Chlorine/Bromine Control)
Controls chlorine or bromine dosing using an amperometric sensor. Operators can set control modes, calibrate sensors, adjust setpoints, and set alarms. Also allows manual or scheduled superchlorination to manage chloramine levels.
pH Menu
Manages pH using either acid, CO2 or base dosing. Includes calibration, control settings, alarm limits, and an Acid Wash program to help maintain sensor accuracy over time.
ORP Menu (Oxidation-Reduction Potential)
Controls ORP levels to ensure effective disinfection. Includes control settings, calibration, alarms, and additional options like Shocking and Chemical Saver Mode for improved chemical efficiency.
Saturation Index & Water Balance Monitoring
The controller continuously calculates and displays the Langelier Saturation Index (LSI) using real-time readings of pH, temperature, alkalinity, and calcium hardness. This helps you maintain proper water balance and provides early alerts to conditions that may cause scaling or corrosion, allowing you to make timely adjustments and protect your equipment.
TDS Menu (Total Dissolved Solids)
Automatically activates the dump valve when TDS or conductivity levels rise above the set threshold. This helps control water clarity and chemical balance.
Temperature / Heater Control
Displays current temperature and controls heaters. Operators can run the heater manually or automatically with a programmable 7-day schedule to save energy and maintain comfort.
Setup Menu
Enables full system configuration, including initialisation and communication settings. Ideal for adapting the controller to suit various facility requirements.
A Complete Water Management Solution
The CHEMTROL® Programmable Controller is a reliable and flexible solution for commercial pool and facility operators, delivering precise, automated water quality management with built-in safety, scheduling, and diagnostic features.
Find out more: Advanced Control Features
Remote Monitoring & Control – Anytime, Anywhere
Your facility operates 24/7, so your controller should be accessible anytime, anywhere.
Remote monitoring and control is an option on every CHEMTROL® programmable controller (standard on the PC7000 and PC7100), and a one-off purchase for the life of the controller – no ongoing fees. Connect the controller to your facility’s network with an Ethernet cable, just as you would a laptop. Where there is no network, a 4G or 5G router with a SIM card makes the connection; the SIM card’s data plan is the only subscription.
Monitor and operate your system from a computer or through the CHEMTROL® App, available for both Apple iOS and Android devices.
The remote interface mirrors the controller screen in real time, making it easy to view live readings, adjust settings, acknowledge alarms, and troubleshoot – just as if you were standing in front of the controller.
Whether you’re managing a single site or multiple facilities, you can:
- Monitor your system and water quality in real time.
- Receive automatic alarm notifications by email or SMS.
- Make operational changes from anywhere.
- Access the controller from your computer, iPhone, iPad, or Android device.
- Enable secure remote support from authorised CHEMTROL® technicians when required.
A dedicated alarm relay sends any alarm straight to your BMS or PLC.
Stay connected to your facility anytime, anywhere with the CHEMTROL® Remote Monitoring System.
