Model TCA-330​​​

Total Chlorine Analyzer​​​​



The TCA-330 is a panel mounted, ready to use Total Chlorine Analyzer. It is designed to monitor total chlorine in drinking water, rinse water, cooling water or other fresh water samples from 0.05-20 ppm Cl2. It features a plug and play design that incorporates a flow control device, a pH sensor, a chlorine sensor and the LXT-220 analyzer/controller conveniently mounted on a PVC panel. 

Total Chlorine Sensor

Total Chlorine is the combined amount of free chlorine, chloramine, organic and bound chlorine in the sample. The TCA Sensor is a three electrode Amperometric sensor with a gold cathode, silver halide anode and 304 SS counter electrode. The counter electrode provides a stable base potential that minimizes drift. The TCA sensor has a microporous membrane that allows ions to diffuse in and out of the sensor. The vario​us chlorine species in the measured solution diffuse into the sensor and react with the acidic potassium iodide electrolyte to form iodine. 

The iodine is reduced at the cathode back to iodide and the current flow between the cathode and silver iodide anode is proportional to the total chlorine. The use of the pH sensor provides accurate compensation for samples between pH 4 and pH 12 and eliminates the need for an expensive sample conditioning system to control the pH of the solution. The LXT-330 allows either parameter to be graphically displayed with user defined ranges allowing easy trend analysis.

Amperometric Chlorine Sensor

Amperometric Chlorine Sensors are flow sensitive, the minimum required flow by the sensor is 0.5 ft/sec, above this value the output is virtually flow independent. A “Constant head” Flow control Device (CFD) maintains the optimum flow by the sensor over a wide range of incoming sample flow rates. The minimum flow required for the CFD is 10 gas/hr and the maximum flow is 80 gal/hr with the sample going to drain at atmospheric pressure.​


  • Reagent-free amperometric sensor detects all chlorine species as a total chlorine reading

  • pH sensor included to compensate for over pH 4-12

  • Ranges: 0.05 to 20 ppm total chlorine(optional 0.005 to 2.00 ppm available), 0-14 pH

  • Constant head-flow control device (CFD) maintains optimum sensor flow over a wide range of incoming sample flow rates

  • Electronics, sensor(s) and accompanying hardware mounted to PVC plate for wall-mounting (optional mounting configuration available - see price adder options)

  • 4-20 mA output card for total chlorine

  • Card slots available for additional 4-20 mA outputs, relay contacts and other modules available

  • Backlit LCD provides easy-to-read data and ability to show any resident parameters, inputs, outputs, control or temperature

  • Power: 110 VAC or 220 VAC @ 50/60 Hz or 24 VDC


​Sensor and Flow Train​​


Amperometric, Three Electrode, Gold-Cathode/Silver-Silver Halide-Anode/304 SS counter enclosure


​Chlorine:      0.05 to 20 ppm
pH:                0 to 14 pH


32° to 113°F (0° to 45°C)​


38 L/hr to 300 L/hr
(10 gal/hr to 80 gal/hr)​

​Wetted Materials

​PVC, PP, PVDF, PTFE, Glass, 304 & 316 SS

​Process Connections

​Input 1/4" barb fitting, drain 3/4" barb fitting

​Response Time

​T90 in approximately 2 minutes

​Electrolyte Life

​Up to 3 months


​pH Compensation

Chlorine:              0.05 to 20 ppm
pH:                        0 to 14 pH
Temperature:      32° to 212°F (0° to 100°C)


​pH 4-12


​2.5" x 1.75" back-lit LCD, 4 lines for Text and Graphical


​NEMA 4X, 5.7"L x 5.7"W x 7"D


​4-20 mA, 800 ohm at 24 VDC
Optional PID output and additional 4-20 mA outputs

​Input Power

​110 / 220 VAC at 50/60 Hz
Optional 24 VDC (12 to 50 VDC) at 0.25A

​​Alarm Relay Rati​ngs

​(2) SPDT 230 VAC / 5A or 30 VDC / 5A resistive max
Optionally up to (8) relays



​​​File Size

Model TCA-330 Broc​​hure


Liquid ​Products Catalog​​​