Sensor Type: ST-765P-FCL (Free Chlorine)
$1,983.00
53619Free Chlorine (0–5ppm) + pH (0–14) + Temperature CPVC Sensor
Configurations
Sensor Type: ST-765P-FCL (Free Chlorine)
Free Chlorine (0–5ppm) + pH (0–14) + Temperature CPVC Sensor
Sensor Type: ST-765P-CLO (ClO2)
Chlorine Dioxide (0–5ppm) + pH (0–14) + Temperature CPVC Sensor
Sensor Type: ST-765P-O3 (Ozone)
Ozone (0–2ppm) + pH (0–14) + Temperature CPVC Sensor
Sensor Type: ST-765P-DCL (Free Chlorine + Sulfite)
Free Chlorine (0–5ppm) + Sulfite (0–100ppm) + pH (0–14) + Temperature CPVC Sensor
Overview

The ST-765P Series are CPVC multi-parameter membrane-less sensors. Based on unique electrochemical principles to determine an oxidizer and pH content in water. These sensors incorporate Pyxis Lab® advanced technology in the field of bare-gold electrochemical detection. The ST-765P Series integrates an oxidizer measurement (Free Chlorine, Chlorine Dioxide, Sulfite, Ozone etc.) plus pH measurement. Both can perform temperature and pH compensation. For the measurement of the oxidizer based on the conditions present in the application of use. This unique internal compensation results in a highly accurate oxidizer measurement. Consistent with DPD wet chemistry methodology as high as a pH of 9.0 and is compliant with USEPA-334.0 & ISO-7393 guidelines.
The ST-765P Series sensors offer a replaceable, front-loading reference electrode assembly. Independently developed by Pyxis Lab®, eliminating the shortcomings associated with membranes and gel replacement while offering reduced polarization time on startup, offering an electrode life span potential of up to 2 years. The flat front-end is platform less prone to contamination or fouling and is easy to clean. The ST-765P Series sensor body is composed of CPVC and is well suited for clean water applications.
The ST-765P Series offer (2) 4-20mA and RS-485 Modbus outputs and is Bluetooth® 5.0 enabled when used with the MA-CR Bluetooth® adapter. The world’s first four-electrode composite sensor that provides three measured parameters including Free Chlorine or Chlorine Dioxide, pH and Temperature with one sensor RS-485 Modbus output. The ST-765P is the best choice for potable water, secondary water supply, domestic water, decorative water and other clean water applications.
Features
Specifications
| Item | ST-765P-FCL/CLO |
| Part Number | ST-765P-FCL 53619 ST-765P-CLO 58861 ST-765P-DCL 59907 ST-765P-O3 54485 |
| Sensor Body Material | CPVC, Plastic |
| Oxidizer Range | ST-765P-FCL 0.00-5.00ppm FCl2 (auto-range) ST-765P-CLO 0.00-5.00ppm ClO2 (auto-range) ST-765P-DCL 0.00-5.00ppm FCl2 + 0.0–100.0ppm SO3 ST-765P-O3 0.00-2.00ppm O3 |
| Oxidizer Precision | ±0.01mg/L or 1% of the Value with pH Compensation up to 9.0 |
| pH Range | 0-14 |
| pH Precision | ±0.01 |
| Sample Inlet Pressure | 7.25-30psi (0.05-0.2MPa) |
| Installation | FR-50 Self-Regulating Flow Reservoir with Rotameter & PRV – NOT INCLUDED |
| FR-50 Min/Max Flow Rate | 200-400mL/min |
| FR-50 Features | 1/4″ OD Sample Inlet 3/8″ OD to Drain Sample Outlet 20mm to Drain Sewage Overflow Outlet |
| Power Supply | 22-26VDC, Power Consumption – 2W |
| Storage Temperature | -7-60 °C (20-140 °F) |
| Outputs | Dual Isolated 4-20mA Analog Isolated RS-485 Digital |
| Dimension (LxD) | 8.3in (210.8mm) L x 1.4in (35.6mm) D |
| Weight | 530g (1.16lbs) |
| MAX Sensor Pressure | 100psi (6.9Bar) |
| Operating Temperature | 4-40 °C (40-140 °F) |
| Wet Material | UPVC |
| Regulation | CE / RoHS |
| Compliance | EPA 334.0 / ISO 7393 |
| Cables Included | MA-4.9CR Cable (8-Pin Adapters – 4.9ft) MA-1.5CR Cable (8-Pin Adapter/Flying Leads – 1.5ft) |
| Typical Electrode Service Life | 2 Years |
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