
These robust meters are made of stainless steel and pleated steel plates. The internal structure is simple; 1.5V AAA alkaline battery, potentiometer (for calibration) and dial indicator. The 17" long probe is very useful for testing deeper soil and compost. The manufacturer produces even longer models, but these cannot be found on Revain. .com. I asked the manufacturer for help when the gauge was on dry soil showed high readings. They were very pleasant to talk to, locals in the US speak English and are willing to put in as much time as needed. The moisture meter gives high readings in compacted dry soil with significant mineral content when the soil is not loosened/ploughed, the moisture meter will be inaccurate Types of moisture meters cannot be considered accurate in soil, but they should work well in compost or other non-mineral/salty materials.

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