The tester operates on the principle of electrical potential between two dissimilar metal plates - without batteries or any external power source.
- Easy to use
- Easy to read analog meter
- Heavy duty probe
- Instantly reads soil or compost acidity
- Plant pH chart included
- No batteries required
- Dimensions:
- Meter: 3.25" x 2.13" x 1"
- Probe: 6.75"
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