Q22PX pH / ORP Universal Sensors

ATi’s Q22 specialty pH/ORP universal sensors are designed for use with all non-ATi analyzer systems and generic panel meters, allowing end-users to utilize the same robust features of the standard ATi Q25 sensors.

 

Replace unreliable sensors & cut maintenance costs

ATi’s Q22 PX universal or loop-powered sensors emulate standard, non-amplified combination sensors and are designed to interface with all non-ATi pH/ORP analyzers. The universal sensors require no power supply as the preamplifier is powered by an internal lithium battery. The pH sensor outputs an mV signal in the range of either -500 to +500 mV or 0 to 2 VDC; both are linear over the 0 to 14 pH range. The ORP (Oxidation Reduction Potential) sensor outputs an mV signal that ranges from -1000 to +1000 mV.

These sensors may be used as replacement sensors for use with all non-ATi analyzers. The Loop-powered sensors require an external 7-30 VDC power supply and provide a 4-20 mA output signal for direct connection to generic panel meters, data acquisition systems, or other devices that accept a current input. The sensor includes integral temperature compensation of the pH signal, so no temperature output is provided. The sensor output is uncalibrated, therefore, the receiving instrument must be capable of providing user calibration of the pH or ORP signal on a periodic basis.

Key Benefits
  • Differential-Style Sensor
  • PEEK® or 316SS Sensor Body Construction
  • Replaceable Sensor Saltbridge
  • Integral Preamplifier
  • Multiple Electrode Types
  • Industrial Water/Wastewater: Measures pH/ORP in challenging process water.
  • Fouling Environments: Handles contaminants that foul conventional sensors via special glass reference system.
  • Retrofitting: Upgrades existing non-Quantum or non-ATI systems with robust ATI technology.
  • Custom Systems: Serves as building blocks for bespoke measurement setups.
  • Panel Meters: Connects directly to standard meters for simple mV readings.
  • Measuring Ranges:
  • pH: 0–14
  • ORP: ±1000 mV or ±2000 mV (model-dependent)
  • Wetted Materials: PEEK, ceramic, titanium, glass, Viton, EDPM; Platinum or Gold tip for ORP
  • Temperature Compensation: Pt1000 RTD
  • Temperature Range: -5 to 95 °C (23–203 °F)
  • Pressure Range: 0–100 psig (0–6.9 bar)
  • Stability: <0.02 pH / 2 mV per 24 h (non-cumulative)
  • Sensitivity: 0.002 pH or 0.2 mV
  • Max Flow Rate: 10 ft/sec (3 m/s)
  • Max Cable Distance: Up to 3000 ft (914 m) for universal models
  • Body Options: 1″ NPT, 1¼” insertion, 1½” or 2″ sanitary-style
  • Outputs:
  • Universal: mV signal (e.g., -500 to +500 mV or 0–2 VDC for pH)
  • Loop-Powered: 4–20 mA (7–30 VDC required)
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