Measurement parameters 
 ※ Range: 0 to 100% 
 ※ Unit:% (m3/m3) 
 ※ Output signal: 0 ~ 2V (voltage) 4 ~ 20mA (current) 
 ※ Accuracy: ± 3% 
 ※ exchange Accuracy: <3% 
 ※ retest error: <1% 
 ※ parameter types: volumetric soil moisture content 
 ※ measuring principle: the frequency domain (FDR) 
 Hardware parameters 
 ※ Working voltage: 5 ~ 12V (voltage, typical 9V) 11 ~ 24V (current-mode, typical 12V) 
 ※ Static current: about 30mA 
 ※ Frequency: 100MHZ 
 ※ Response time: <1 second 
 ※ measurement settling time: 2 seconds 
 ※ Operating temperature range: -30 ℃ ~ 70 ℃ 
 ※ Measurement area: 95% of the center in the central probe, diameter 7cm, 7cm in height inside the cylinder 
 Physical parameters 
 ※ Probe Length: 6cm 
 ※ probe diameter: 3mm 
 ※ probe materials: stainless steel (anti-electrolysis) 
 ※ sealing materials: epoxy resin (Black Flame) 
 ※ Cable length: standard 2-meter (three-conductor shielded cable) 

 Features 
 ※ green flame-retardant epoxy resin used is completely waterproof, can withstand strong external shocks; 
 ※ surface polished, elegant, with anti-static bags, storage more secure; 
 ※ needle high-quality materials, can withstand long-term electrolysis, the pH of the soil can withstand corrosion; 
 ※ high accuracy, reliable performance, less affected by soil salinity, can be adapted to all kinds of soil. 
 ※ with power cord, ground wire, three-way signal line protection, may be due to reverse polarity protection, short circuit caused the damage. 

 Scope: 
 ※ for scientific experiments, water-saving irrigation, greenhouses, flowers, vegetables, grass pastures, soil-speed testing, plant cultivation, sewage treatment and water content measurements of various particles.