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Home > Sensors > Single Use Loop > TruFluor pH

TruFluor pH

TruFluorpH

Features

■ Sheath, optical reader, and transmitter
■ Minimal long-term drift
■ Gamma radiation resistant Smartchip for
self-calibration and lot traceability
■ USP Class VI, gamma radiation resistant
wetted materials
■ Plug-and-play

TruFluor pH
Single Use Optical pH Probe

The TruFluor™ pH and temperature sensor is a singleuse
solution consisting of a disposable sheath, an
optical reader, and a transmitter. The single-use
sheath can be pre-inserted in a disposable bioreactor
bag port and irradiated with the bag, in order to both
preserve and guarantee the sterile barrier. All wetted
materials of the sheath are USP class VI compliant.

The optical reader utilizes an LED and a large area
photodiode with integrated optical filtering, that
minimizes photo-degradation of the acting sensing
element. The design has been optimized to provide
accurate in-situ measurement of pH using phase
fluorometric detection in real time.

The temperature measurement leverages a 316L
stainless steel thermal window embedded in the
sheath, and provides a highly accurate temperature
measurement that can be used as a process
variable, or for temperature compensation.

Environmental Specifications
Parameter Units Min Typ Max
Operating Temperature °C 4   45
Operating Pressure Bar (psi)   1(14.7) 2(29.4)
Storage Temperature °C 0 22 65
Storage Relative Humidity (non-condensing) % 0 60 100
Altitude feet     40,000
Materials USP Class VI and 316L electro-polishged SS
Performance Specifications

Min Max
Sample Rate Sample rate can be set so that samples are taken in increments from 1 second to 30 minutes
Measuring Range (pH) 5.5 8.5
Specification Range (pH) 5.5 7.5
Relative Accuracy (pH) +/- 0.1 pH units over +/- 0.5 pH range centered at 1-point standardization pH value
Accuracy at 37.5 °C Depends on accuracy of method and off-line analyzer used for 1-point standardization.
Response Time (sec) <90 (agitated, 90%)
Drift < 0.05 pH units over 21 days for a standard process sampling once every 5 seconds
Calibration Pre-calibrated (gamma-radiation-resistant chip). Conventional 2-point cal possible. 1-point standardization required.
Gamma Radiation Tested to 50 kGy (typical 25 - 40 kGy)
Temperature Accuracy Precision
From 4 to 45°C ± 0.25°C ± 0.1°C
From 15 to 40°C ± 0.15°C ± 0.1°C

TruConnect,TruLogic and TruBio are trademarks of Finesse Solutions, LLC. © Finesse Solutions, LLC, 2009.