Replacement Wireless ISFET pH Probes
These replacement ISFET Probes are for use with the Sentron wireless ISFET pH Meter. Not compatible with the SI400 and SI600 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
- CupFET: flat tap (with cup)
- MicroFET: with a thin (3 mm diam.) probe and micro sensor
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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ISFET Probes |
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ConeFET |
LanceFET |
CupFET |
MicroFET |
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General |
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General liquids (low viscosity) |
• |
• |
• |
• |
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Semiliquids (low to medium viscosity) |
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• |
• |
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Semi solids / paste (medium to high viscosity) |
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• |
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Piercing capapability |
medium/normal pressure |
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• |
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General beakers and containers |
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• |
• |
• |
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Deep containers (up to 120 mm) |
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• |
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• |
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Small sample volume (20 uL) |
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• |
• |
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Test tubes / vials (as small as 3 mm diameter) |
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• |
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pH |
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Sensor |
Ion Sensitive Field Effect Transistor (ISFET) semiconductor, glasfree |
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Range |
pH 0 - 14,00 |
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Accuracy |
+/- 0,02 pH |
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Resolution |
0,01 pH |
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Drift max. (in pH 7 after 24 hours @ 25 °C) |
0,14 pH |
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Drift typical (in pH 7 after 24 hours @ 25 °C) |
0,05 pH and lower |
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Calibration |
1,2,3 and 5 points |
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Automatic Temperature Compensated Calibration (ATC) |
yes |
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Buffer Solutions |
Sentron,DIN, NIST, JIS |
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Reference System |
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Type |
non-flow |
non-flow |
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Diafragm |
porous PTFE |
ceramic |
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Referentievloeistof |
gelled KCI |
gelled KCI |
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Temperature |
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Sensor |
NTC |
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Accuracy |
1 % |
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Range |
0 to 80 °C |
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Resolution |
0,1 °C |
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Physical Properties |
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Dimensions |
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Length probe (submersible) |
128 mm |
131 mm |
128 mm |
110 mm |
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Length adapter |
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48 mm |
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Diameter probe |
10 mm |
10 mm |
10 mm |
3 mm |
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Diameter adapter |
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10 mm |
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Cable length |
1600 mm |
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Material |
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PEEK/ABS |
PEEK/Stainless Steel tip |
PEEK/ABS |
PEEK |
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Weight |
18 gr |
18 gr |
18 gr |
12 gr |
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Operation / Storage |
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Temperature |
0 to 80 °C |
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Humidity |
30 % to 80 % relative humidity |
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Protection Class |
IP67 dust and waterproof |
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