Can I put the probe directly in soil?
No, Ion Selective electrodes can only work in liquid, they are potentiometric and work by measuring the potential difference between the charge built up as a result of free ions in solution against the fixed potential of the reference electrode also submerged in the same solution.
To measure soil, please refer to the section on soil in these FAQs
Related Articles
Soil Measurements
Can we use the cleangrow probe to measure soil? Yes, the general protocol used is to extract the free ions in from the soil using a soil to De-Ionised water ration of 1:1 or 1:1.5 or similar, whatever is preferred in your lab. Filtering is preferred ...
Charging the probe
To charge the probe, use the cable supplied via a computer USB port, or a standard phone charger. Charging is controlled to preserve the longevity of the battery so takes a few hours to ideally over night. You can see the charge level of the battery ...
Probe bluetooth connection
Sometimes the probe will not connect, this is usually because the batteries need to be above a certain threshold for the bluetooth to kick in Either connect your CleanGrow auxiliary battery pack or recharge your probe for a bit
What probe type do I have
Sensor Combinations M62 [Ca2+, Cl-, K+, Na+, NH4+, NO3-] M63 [Ca2+, Cl-, Mg2+, Na+, NH4+, NO3-] M64 [Ca2+, Cl-, K+, Mg2+, NH4+, NO3-] M67 [Ca2+, Mg2+, K+, Na+, NH4+, NO3-] M68 [Ca2+, Cl-, K+, Na+, Mg2+, NO3-] NPK2 [Ca2+, K+, Mg2+, NH4+, NO3-, PO43- ...
Using the CG200 Auto analyser
In the box: 2 5l containers of calibration solution 1 and 2. The main unit. When you set it up, put the inlet tube for cal 1 into the cal 1 bottle and the same for tube 2. Then plug it in it will boot up with a cleangrow screen. Then if you have a ...