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Rosemount™ 550pH Single-Use Sensor
rosemount 550ph-single-use-sensor
The Rosemount 550 Single-Use pH Sensor is designed to provide high measurement stability for single-use bioprocessing applications.
The pH sensor stability of <0.005 pH change per day enables users to do a one-point calibration at the start of the batch and operate for 30 days without any required maintenance or recalibration. Our patented wet storage technique enables a two-year shelf life as well as immediate sensor verification and calibration, eliminating the initial stabilization process.

Rosemount(TM) Analytical Minds on pH Sensors: Know when to clean or replace, reduce downtime

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Rosemount(TM) Analytical Minds on pH Sensors: Keep optimal pH levels and improve process efficiency

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Rosemount(TM) Analytical Minds on pH Sensors: Calibrate pH sensors and maintain measurement accuracy

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Rosemount™ 550pH Single-Use Sensor


Measurement Type
Potentiometry, pH glass electrode and double-junction reference electrode
Measurement Range
2-12 pH
<0.005 pH drift per day under laboratory conditions
Operating Temperature
4 to 40 °C (39 to 104 °F)
Operating Pressure
0 - 30 psig
Temperature Sensor Types
Pt-100 RTD
Process Connection
1 inch barb fitting on Single-Use bag
Transmitter Support
All Rosemount pH transmitters
Process Wetted Material
Glass, EPDM, ULTEM, Epoxy (Loctite Hysol M-21 HP, ISO 10993), Ceramic Junction, Pharm-Aline, I Tubing, Storage Buffer (See SDS in Appendix for more information)


  • High measurement stability which leads to fewer one-point sensor standardizations
  • Shelf life up to two years from manufacturing date
  • Single-use pH sensor begins measurement immediately, with no stabilization time needed to wet glass for a measurement
  • Ensure single-use pH sensor functionality prior to filling the bioreactor bag with a true, one point standardization against a calibrated traceable storage solution
  • pH sensor installs into 1 inch barb fittings onto single-use bio-reactor bags
  • USP Class VI, ISO 10993, and ADI-free compliant wetted materials