Watch tutorials, webinars and informative videos about PreSens optical sensor systems.
Measuring pH with High Spatial Resolution
Needle-type pH Microsensor NTH-HP5
The NTH-HP5 is designed for measuring in small volumes. The sensor is based on a 140 μm silica fiber which enables integration into manifold small scale environments. With its protective syringe needle housing the NTH-HP5 can easily penetrate tissue, septum rubber or packaging materials. After penetration the sensor tip is extended for measurements.
- High spatial resolution
- Measurement in smallest volumes
- Profiling of pH gradients
- Integration into plant and animal tissue
- Optimized for culture media and physiological solutions
pH Measurement in Plants & Animals
pH Microsensors can be implemented in plant tissue or even in small animals. New insights in physiological aspects can be obtained. Due to the small size of the probes only a minimal disturbance will occur.
pH Measurement in Small Volumes
Due to the small dimension of the probe, pH measurements can be done in very small volumes - even in microtiter plates of a higher format like 384 or 1536. No need for reference electrodes - a real step forward, especially in small volumes. Of course, the measurement is independent of electromagnetical fields - this even allows measuring in NMR spectrometers.
|* provided pH sensors are used without further handling in physiological solutions|
|Measurement range||5.5 - 8.5 pH|
|Resolution||at pH = 7: ± 0.02 pH|
|Accuracy||at pH = 7: ± 0.1 pH with sensor calibration|
|Drift||at pH = 7: < 0.05 pH per day (sampling interval of 1 min.)|
|Measurement temperature range||from + 5 to + 50 °C|
|Response time (t90)||at 25 °C: < 30 sec.|
|Compatibility||Aqueous solutions, ethanol (max. 10 % v/v), methanol (max. 10 % v/v), pH 2- 10|
|No cross-sensitivity||Electrical fields, proteins|
|Cross-sensitivity||Reduced to ionic strength (salinity); a high concentration of small fluorescent molecules in the visible range can interfere|
|Sterilization procedure||Ethylene oxide (Et0), recalibration recommended|
|Cleaning procedure||Water, Acrylan, pepsin solution|
|Calibration||pH sensors are pre-calibrated; recalibration is possible|
|Storage stability||24 months provided the sensor is stored in the dark|
The pH-1 micro is a precise fiber optic pH meter. It is...
The pH-4 micro is a multi-channel pH meter used with...
Manual Micromanipulator MM
The Manual Micromanipulator MM is specifically designed for...
Automated Micromanipulator AM
The Automated Micromanipulator is specifically designed for...
PreSens Profiling Studio
This software enables control of the Automated...
The safe insert accessory can be attached to the Automated...