pH Flow Through Cell


  • Measurement range pH 4.0-6.0
  • Luer-lock T-Connector with removable pH mini probe
  • For ca. 3.2 or 4.8 mm ID tubings
  • No reference electrode required

These flow-through cells have an integrated pH probe for continues measurements of aqueous samples pumped through the cell. The cell consists of a Luer-lock T-Connector with a removable pH probe. The Luer-lock connectors allow direct connection of tubings with ca. 3-4 mm inner diameter.

pH range 4.0-6.0 This sensor is specified for the pH range 4.0-6.0. For detailed specifications, see the respective pdf file in the Downloads tab.

Optical isolation. This sensor type is equipped with an additional optical isolation protection layer. This layer avoids interferences with the measurements in applications at high ambient light (e.g. direct sunlight, illuminated samples) and in fluorescing / light-sensitive samples.

Easy calibration. Calibration of the pH sensors is performed at pH 2 and pH 10.0 using our easy-to-use calibration buffer capsules (PHCAL2 and PHCAL10). For detailed calibration recommendations, please refer to the manual in the downloads tab.

ST-connector. This connector is our standard sensor connector for PC-operated and handheld FireSting devices.

Temperature compensation. Due to the cross sensitivity to temperature changes, the temperature compensation of the pH flow-through-cells can be realized:

  • Using our flow-through-cell with integrated optical temperature sensor (TPFTC2) and connecting it into your stream shortly before/after the pH sensor.
  • Using a Pt100 temperature probe and measuring the temperature of the sample shortly before/after pumping it into the flow-through cell.
  • Keeping the sample at a constant temperature using a thermostatic bath and using fixed temperature in the software.

Applications. To get an overview of potential applications and to see our sensors in action, please visit our Applications site!

Calibration Capsules (pH 2)


For obligatory acid calibration of optical pH sensors. Each capsule results in 100mL calibration solution (PU=10).

Calibration Buffer Capsules (pH 10.0)


For recommended basic calibration of optical pH sensors. Each capsule results in 100mL calibration buffer solution (PU=10).

Every PyroScience pH meter with a ST-connector is compatible to this sensor. Use this link to get a list of all compatible meters. Select additional requirements to find the optimal meter for you and your application!



Choose the multi-analyte FireSting pro (4 chan.) with the pH flow-through cell PHFTCR-PK5

  • 4 freely configurable optical channels
  • + oxygen & temp sensor support