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Pyxis ST-772 Series Luminescent Dissolved Oxygen Sensors

  • NG # 04354-HW-PYXIS-013

The Pyxis ST-772 Series is an advanced optical luminescent dissolved oxygen (DO) sensor designed for accurate and stable measurement in water and process applications. It uses fluorescence quenching technology to deliver precise DO readings with minimal maintenance and long-term calibration stability.

Manufactured By :
Pyxis
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Call +88 01714243446

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Overview

The Pyxis ST-772 Series dissolved oxygen sensors are high-performance optical sensors developed for reliable monitoring of dissolved oxygen in water systems. The sensor operates on luminescence-based (fluorescence quenching) technology, eliminating the need for traditional membrane and electrolyte replacement systems.

It features built-in temperature and pressure compensation to ensure accurate readings under varying environmental conditions. The sensor is designed with a flat, anti-fouling front-end structure, making it resistant to contamination and easy to clean, which reduces maintenance requirements.

The ST-772 Series is available in multiple configurations for submersible or inline/bypass installation and is constructed in durable 304 stainless steel or CPVC housing for industrial compatibility. It supports both analog (4–20 mA) and digital (RS-485 Modbus) outputs, enabling easy integration with modern monitoring and control systems.

With a long-life optical membrane cap (up to 2 years), low drift, and minimal calibration needs, the ST-772 Series is widely used in wastewater treatment, aquaculture, drinking water systems, and industrial process monitoring.

Specification

  • Measurement Technology: Optical luminescent (fluorescence quenching)
  • DO Measurement Range: 0.004 – 20 mg/L (also up to 200% saturation / 0–500 mbar PO₂)
  • Resolution: 0.01 mg/L
  • Accuracy: ±0.1 mg/L or ±1% (whichever is greater)
  • Response Time: < 60 seconds
  • Operating Temperature: 0–50 °C (32–122 °F)
  • Operating Pressure: Up to 145 psi
  • Power Supply: 22–26 V DC (0.6 W)
  • Outputs: 4–20 mA analog and RS-485 Modbus
  • Body Materials: 304 stainless steel or CPVC
  • Installation Types: Submersible or inline/bypass (tee)
  • Temperature & Pressure Compensation: Built-in automatic compensation
  • Membrane Life: Up to 2 years (replaceable optical cap)
  • Protection Rating: IP67 / IP68
  • Calibration: Air / air-saturated water (slope), sodium sulfite or nitrogen (zero)

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