Optical pH Sensors

All PyroScience optical pH sensors utilize patented REDFLASH technology that guarantees fast and accurate pH measurements with no sample consumption. 


PyroScience pH sensors guarantee minimal cross-sensitivity to ionic strength and outstanding photostability that enable high sampling rates over long periods. The sensors work over a confined pH range (2 pH units) at high resolution. We offer sensors for four different ranges: pH 4.0 - 6.0, 5.0 - 7.0, 6.0 - 8.0 and pH 7.0 - 9.0.

PyroScience recommends a 2-point calibration before every measurement. Please review this Optical pH Sensors User Manual before you start using them. Pick and choose from a variety of fiber-optic and contactless pH sensor options. 

Fiber-Optic pH Sensors

Contactless Optical pH Sensors

Robust Optical pH Probe Options for Liquid Samples
4mm tip diameter, response time (t90 <60 s), optically isolated, 4 exchangeable screw cap sensors
  • PHROBSC-PK5: pH 4.0 - 6.0 measurement range, 10cm long, 2m cable

  • PHROBSC-PK6: pH 5.0 - 7.0 measurement range, 10cm long, 2m cable

  • PHROBSC-PK7: pH 6.0 - 8.0 measurement range, 10cm long, 2m cable

  • PHROBSC-PK8: pH 7.0 - 9.0 measurement range, 10cm long, 2m cable

  • PHROBSC-PK8T: pH 7.0 - 9.0 measurement range (total scale), 10cm long, 2m cable

  • PHROBSC-PK8T-SUB: pH 6.0 - 8.0 measurement range, 10cm long, 2m cable, with -SUB connector

  • PHROBSC-PK8-SUB: pH 7.0 - 9.0 measurement range, 10cm long, 2m cable, with -SUB connector

  • PHROBSC-PK7-SUB: pH 6.0 - 8.0 measurement range, 10cm long, 2m cable, with -SUB connector

Robust Oxygen Probe - OXROB10-CL4-SUB.jp
Optical pH Sensor Spot Options
Requires transparent surface, fiber optic cables and adapters for complete setup
  • PHSP5-PK5: measurement range pH 4.0-6.0, response time (t90 <60 sec), requires SPGLUE glue

  • PHSP5-PK5-ADH: measurement range pH 4.0-6.0, response time (t90 <60 sec), self-adhesive

  • PHSP5-PK5-ADH-STER: same as PHSP5-PK5-ADH plus sterilized

  • PHSP5-PK6: measurement range pH 5.0-7.0, response time (t90 <60 sec), requires SPGLUE glue

  • PHSP5-PK6-ADH: measurement range pH 5.0-7.0, response time (t90 <60 sec), self-adhesive

  • PHSP5-PK6-ADH-STER: same as PHSP5-PK6-ADH plus sterilized

  • PHSP5-PK7: measurement range pH 7.0-9.0, response time (t90 <60 sec), requires SPGLUE glue

  • PHSP5-PK7-ADH: measurement range pH 7.0-9.0, response time (t90 <60 sec), self-adhesive

  • PHSP5-PK7-ADH-STER: same as PHSP5-PK7-ADH plus sterilized

  • PHSP5-PK8: measurement range pH 7.0-9.0, response time (t90 <60 sec), requires SPGLUE glue

  • PHSP5-PK8-ADH: measurement range pH 7.0-9.0, response time (t90 <60 sec), self-adhesive

  • PHSP5-PK8-ADH-STER: same as PHSP5-PK8-ADH plus sterilized 

  • PHSP5-PK8T: same as PHSP5-PK8, but measurement range on total scale, requires SPGLUE glue

pH Sensor Spots.jpg
Optical pH Flow-Through Cell Options
For inline pH monitoring, 20-500 mL/min recommended flow rate, response time (t90<60 sec)

  • PHFTCR-PK5: measurement range pH 4.0-6.0, no reference electrode required, 2 cells per pack

  • PHFTCR-PK6: measurement range pH 5.0-8.0, no reference electrode required, 2 cells per pack

  • PHFTCR-PK7: measurement range pH 6.0-8.0, no reference electrode required, 2 cells per pack

  • PHFTCR-PK8: measurement range pH 7.0-9.0, no reference electrode required, 2 cells per pack

  • PHFTCR-PK8T: same as PHFTCR-PK8, but measurement range on total scale 

Inline pH Flow Through Cell.jpg
Optical pH Sensor Vial Options
With optical isolation, requires fiber cables and adapters for complete setup, 4 vials per pack
  • PHVIAL20-PK7: with integrated pH sensor (range 6-8), ca. 20ml volume

  • PHVIAL20-PK8: with integrated pH sensor (range 7-9), ca. 20ml volume

  • PHTOVIAL20-PK7: with integrated oxygen, pH (range 6.0-8.0) and temperature sensors, ca. 20ml 

  • PHTOVIAL20-PK8: with integrated oxygen, pH (range 7.0-9.0) and temperature sensors, ca. 20ml 

  • PHTVIAL20-PK7: with integrated pH (range 6.0-8.0) and temperature sensors, ca. 20ml 

  • PHTVIAL20-PK8: with integrated pH (range 7.0-9.0) and temperature sensors, ca. 20ml 

pH  Sensor Strips for Vials.jpg
pH Calibration Capsules
10 capsules per pack, each capsule results in 100mL buffer solution
  • PHCAL2: Buffer capsules for 100ml buffer (pH 2), for calibration of optical pH sensors

  • PHCAL11: Buffer capsules for 100ml buffer (pH 11), for calibration of optical pH sensors

PHCAL11-e4e21e83.jpg