Watch tutorials, webinars and informative videos about PreSens optical sensor systems.
Micro-invasive Measurements in Customized Applications
Implantable pH Microsensor IMP-HP5
The implantable pH Microsensor IMP-HP5 is not mounted into any additional housing and therefore ideally suited for implementation in customized applications. The bare glass fiber tip can be mounted to your own housings, steel tubes, catheters, etc. This tiny probe has a tip size of 150 μm, while the outer diameter ranges from 140 μm to 900 μm. As the IMP-HP5 is free of metal, it can be used in the presence of high electromagnetical fields and even NMR environment.
- High spatial resolution
- Measurement in smallest volumes
- Designed for customized applications
- Integration into plant and animal tissue
- Optimized for culture media and physiological solutions
- Independent of electromagnetic fields
Applications
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.
Technical
| Specifications* | |
|---|---|
| *provided pH sensors are used without further handling in physiological solutions **calibration and following measurements in the same conditions / system; equilibrated sensor kept in well stirred solution at + 37 °C | |
| 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. |
| Properties* | |
| 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 |
Related products
Resources
FAQs
Can I integrate an oxygen microsensor into a catheter?
Can I measure inside a tissue with fiber optic microsensors?
Can I use the Manual Micromanipulator with an implantable microsensor as well, or is it only for needle-type microsensors?
How can I prevent oxygen or pH microsensors from breaking when measuring profiles across tissue?
How do I import data into excel from a text file containing measurement data?
How does temperature affect my pH measurement?
How often will I have to exchange the microsensor?
How to prepare buffers of constant ionic strength and calibrate optical pH sensors?
The needle tip of the microsensor is vibrating or not moving smoothly when I try to insert it in the sample with the Manual Micromanipulator. What can I do?
What are the exact dimensions / diameters of Implantable O2 and pH Microsensors?
What is the correct way for handling an oxygen or pH microsensor?
What is the difference between tapered and flat-broken microsensor tips?
What is the time of delivery?
Which buffers can be used for calibration of chemical optical pH sensors?
Which substances can interfere with the optical O2, pH and CO2 measurements?
Why does my pH sensor not work in tap water?