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Pyxis ST-774 Ultra-Low Luminescent Dissolved Oxygen Sensor & Flow Cell

  • NG # 04359-HW-PYXIS-018

The Pyxis ST-774 is an ultra-low range dissolved oxygen (DO) sensor designed for highly sensitive water quality monitoring. It uses advanced fluorescence quenching technology to measure dissolved oxygen at extremely low concentrations, making it suitable for ultra-pure water, power plants, and industrial process control applications.

Manufactured By :
Pyxis
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Call +88 01714243446

Stock

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Get A Quote

Overview

The Pyxis ST-774 is a high-precision optical dissolved oxygen sensor capable of measuring ultra-low DO levels in water with exceptional accuracy and stability. It operates using a luminescent (fluorescence-based) sensing method that detects oxygen partial pressure in the water and converts it into accurate DO readings.

The sensor is built for demanding industrial environments and is commonly used in applications such as boiler feed water, de-aeration systems, condensate return lines, semiconductor rinse water, and power generation systems. Its design minimizes fouling and allows long-term stable operation with low maintenance requirements.

The device integrates advanced electronics for signal processing and supports industrial communication outputs, making it easy to connect with PLCs and control systems. It also includes a replaceable membrane cap system for extended service life and simplified maintenance.

Specification

  • Measurement Range: 0.0 – 2,000 µg/L (ppb) 
  • Detection Limit: 0.1 µg/L (ppb) 
  • Resolution: 0.1 µg/L (ppb) 
  • Accuracy: ±0.3 µg/L or ±1% (whichever is greater) 
  • Operating Temperature: 0–50°C (32–122°F) 
  • Flow Range: 50–500 mL/min (recommended) 
  • Pressure Rating: Up to 145 psi (10 bar) 
  • Output Signals: 4–20 mA analog, RS-485 Modbus 
  • Material: 316L stainless steel 
  • Power Supply: 22–26 VDC
  • Response Time: <30 sec (liquid phase)
  • Protection Rating: IP67/IP68
  • Calibration: Zero and span calibration support (nitrogen-based methods)
  • Sensor Technology: Fluorescence quenching (optical DO measurement)

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