GE Amersham Pharmacia Biotech AKTA FPLC Monitor pH/C 900

Amersham Biosciences

SKU: AKTAphc900

Monitor pH/C-900 is a combined unit for accurate, on-line monitoring of pH and conductivity in a wide range of liquid chromatography applications.

  • Measures pH and conductivity simultaneously (temperature-compensated).
  • Complements UV monitoring by providing true elution conditions.
  • Extremely useful for optimizing gradients, monitoring reproducibility over several runs, and ensuring the quality of samples, buffers, and data from other instruments.
  • Wide dynamic range from 0-14 pH units and 1 µS/cm to 999.9 mS/cm eliminates range settings. Highly suitable for applications ranging from low conductivity reversed phase to high salt separations.
  • High-performance flow cells handle flow rates up to 100 ml/min.

Monitor pH/C-900 precisely measures the elution conditions of chromatographic separations, either as a component of ÄKTAdesign systems or as a standalone instrument. It displays pH, conductivity, and temperature. Since temperature can influence both pH and conductivity, the monitor compensates for temperature variations of these readings. Self-diagnostics ensure continual reliability and reproducibility. Both the pH and the conductivity/temperature flow cells feature low cell volume and high linearity for accurate measurements.

Parameter Monitor pH/C-900
Order Information Conductivity cell, pH flow cell and pH electrode must be ordered separately. 
Accuracy The greater of ± 2% of full scale or ± 10 µS/cm in the range 1 µS/cm-300 mS/cm ± 0.1 pH unit, temperature compensated Max. 0.1 pH units within 0–10 ml/min (pH measurement) 
Operating Pressure Max. 50 bar (5 MPa) (725 psi) 
Conductivity 1 µS/cm-999.9 mS/cm 
Operating Temperature 4°C-40°C 
Relative Humidity 20%-95% (non condensing) 
Wetted Part No 
pH Stability Long Term 2-12 
Baseline Noise ± 0.5% of full scale calibrated range 
Drift Max. 0.02 pH/h (measured at pH 4.0) ±0.5 °C per 10 h 0.1 pH unit deviation/10 h 
Cell Constant 50 ± 20 cm-1 
Response Time Max. 10 s (0–95% of step) (pH measurements) Max. 3 s (0–95% of step) (Conductivity measurement) 
Width 260 mm
Depth 370 mm 
Height 100 mm 
Weight 8.5 kg
Voltage 100-120/220-240 VAC 
Protection Class IP 20 (Housing) IP 44 (Flow cell) 
Material Glass Perfluororubber (FFKM) Polyetheretherketone (PEEK) Polytetrafluoroethylene (PTFE) Titanium alloy (Ti alloy) Chlorotrifluoroethylene (CTFE) 


    Used. Great functional condition. Unit tested with UNICORN software.

    Please note:  This instrument does not include the Conductivity flow cell or pH-Probe


    (1) GE Amersham Pharmacia Biotech AKTA FPLC Monitor pH/C 900
    (1) Power cord



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