Biotech-Lab User Manual
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9.1.3 CARING FOR THE CONDUCTIVITY/TEMPERATURE ELECTRODE
Thorough cleaning of the electrode is particularly important for measuring low conductivities. Water-soluble substances must
be removed by rinsing with deionised water. Remove lime and hydroxide crusts with a 10% citric acid solution. To do this,
immerse the electrode in the solution for 30 minutes at room temperature, then rinse it thoroughly with deionised water. Do not
touch the electrode surface with your fingers.
Basically, the conductivity measuring cell does not decay over time. Particular measuring media (for example, strong acids
and caustic solutions, organic solvents), or too high temperatures shorten the service life considerably, and/or lead to
damage.
9.2 HDU-PRH & HDU-PRS
Pressure Sensor Family
9.2.1 Technical Data
All Versions
Reading:
Readings as mmHg, kPa, Bar or PSI
Measuring:
Temperature compensated
Pressure
Connection:
IBP-Sensor Port and G1/8” Female internal thread
Membrane:
HDU-PRS versions have a Stainless steel membrane which is fluid resistant
HDU-PRH5
Range:
-5 to 5 psi
-0.34 to 0,34 bar
-258 to +258 mmHg
Resolution:
0.01 mmHg
Accuracy:
General 0.05% full scale
Media
Compatibility: Gasses
Over pressure: 2 x full scale
HDU-PRH15
Range:
-13 to 15 psi
-0.93 to 1 bar
-700 to +775 mmHg
Resolution:
0.01 mmHg
Accuracy:
General 0.05% full scale
0 to 300 mmHg ± 0.4
mmHg
Media
Compatibility: Gasses
Over pressure
2 x full scale
HDU-PRH30
Range:
-13 to 36 psi
-0.93 to 2.5 bar
-700 to +1900 mmHg
Resolution:
0.01 mmHg
Accuracy:
General 0.05% full scale
-500 to 1000 mmHg ± 1
mmHg
Media
Compatibility: Gasses
Over pressure:
1.5 x full scale
HDU-PRS5
Range:
-5 to 5 psi
-0.34 to 0,34 bar
-258 to +258 mmHg
Resolution:
0.01 mmHg
Accuracy:
General 0.1% full scale
Media
Compatibility:
Gasses and Fluids
Over pressure:
2 x full scale
