Replacement Wireless ISFET pH-EC-ORP-Temp Probes
These replacement ISFET Probes are for use with the Sentron wireless ISFET pH-EC-ORP-Temp Meter. Not compatible with the SI400 and SI600 meters.
Note: Also suitable for the FieldScout ISFET pH/EC meters.
Models
All probes have an ISFET sensor based on the same technology. Each probe is the same when it comes to accuracy. The form and material make each probe different for different uses.
The following replacement probes are available:
- ConeFET: blunt tip
- LanceFET: scharp tip voor easy penetration
When making a choice above, you can see a picture of each probe.
Usage
The probes can be used for multiple types of samples (wet/dry). The sensor doesn't need to be kept wet when stored. The ISFET sensor is less prone to damages and pressure in comparison with glass type sensors.
- Important -
When using the probes in soil or potting material, pelase make sure the sample does not conatin any sharp material, such as gritty sand, grit sharp rocks etc. These materials can damage the ISFET sensor when scraped by it. Please predrill a hole with a pick or screwdriver in sharp soil before inserting the probe.Soft(er) material such as perlite and vermiculite in potting mixes generally do not cause any problem.The ConeFET and LanceFET are suitable for soil measurement. For heavy soil use the LanceFET.
Specifications
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Wireless ISFET pH/EC/ORP/T Meters |
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PH |
ConeFET |
LanceFET |
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Sensor |
Glass-free Ion Sensitive Field Effect Transistor (ISFET) semiconductor |
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Range |
pH 0,00 t/m pH pH 14,00 |
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Accuracy |
+/- 0,02 pH |
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Resolution |
0,01 pH |
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Drift maximal (in pH7 @ 25°C) |
0,14 pH / day |
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Drift typical (in pH7 @ 25°C) |
0,05 pH/day and lower |
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Calibration |
1-, 2-, 3- and 5-point calibration |
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ATC (automatic temperature compensation) |
yes |
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Calibration Buffer Types |
Sentron buffers, DIN, NIST, JIS |
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Reference System |
ConeFET |
LanceFET |
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Type |
non-flow |
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Reference Solution |
gelled KCL |
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Diaphragm |
Porous PTFE |
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EC/T |
ConeFET |
LanceFET |
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Sensor |
4-electrode EC sensor |
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Range |
50 - 111.800 µS/cm |
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Accuracy ≤ 1% |
50 - 12.880 µS/cm |
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Accuracy ≤ 10% |
50 - 111.800 µS/cm |
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Resolution (50 - 12.880 µS/cm) |
0,5 nS/cm |
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Resolution (50 - 111.800 µS/cm) |
50 nS/cm |
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Drift typical (in 1,413 µS/cm EC @ 25°C) |
2,5 µS/cm |
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Calibration |
at factory / 1-point |
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ATC (automatic temperature callibration) |
yes |
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Calibration Standards |
Sentron calibration standards (500 µS/cm, 1.413 µS/cm, 12.880 µS/cm) |
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ORP |
ConeFET |
LanceFET |
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Range |
-2.000mV - +2.000mV |
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Accuracy |
+/- 0,2 mV |
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Resolution |
0,1 mV |
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Calibration |
at factory |
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Temperature |
ConeFET |
LanceFET |
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Sensor |
NTC |
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Accuracy |
1% |
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Resolution |
0,1°C (0,1 °F) |
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Range |
0 - 80°C (32 - 176°F) |
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