ZD-1804 Digital Soil Available N-P-K Nutrient Tester Range: 0 - 1999 mg/Kg (mg/l). Resolution: 1 mg/Kg (mg/l). Accuracy: ±2% F.S. Operating Temperature: 5 - 45°C (41 - 1113°F) / ATC. Calibration: One-point ( the factory is calibrated and the user does not need to recalibrate ). Display: LCD with illumination. Power supply: DC 9V Battery (rechargeable ) . Size: Ø50.5 X 140 mm(probe section). Weight: 80g. Features: Automatic switch-off function: after about 5 minutes without pushing buttons, the meter will be switched off automatically . Used: It USES customized special metal materials as sensors to realize rapid determination of soil available N、P、K nutrients.
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