Functional differences between three different types of soil testing instruments

The soil tester is also called soil nutrient nutrient meter, soil tester, and there are many different models. TPY-6 earth tester, TPY-6A earth tester, TPY-6PC earth tester are three different models of the same series. From the perspective of technical parameters, TPY-6 soil tester, TPY-6A soil tester, and TPY-6PC soil tester are used to determine available nitrogen, available phosphorus, available potassium, total nitrogen, total phosphorus, total potassium, and organic matter. 1. The technical parameters of nutrient measurement are also the same: (1) Stability: A value (absorbance) is less than 0.003 in three minutes; (2) Repeatability: A value (absorbance) is less than 0.005; (3) Linearity error: less than 3.0 %; (4) Sensitivity: Red ≥4.5×10-5; Blue ≥3.17×10-3; (5) Wavelength range: Red 620±4nm; Blue 440±4nm; Green 520±4nm. The salt content (conductivity) measurement technical parameters are also the same: (1) Test range: 0.01% to 1.00%; (2) Relative error: ± 5%.

The TPY-6, TPY-6A, and TPY-6PC are the same basic features, such as TPY-6, TPY-6A, TPY-6PC. The instrument can detect available nitrogen, available phosphorus, available potassium, organic matter content, soil pH, and soil salinity in soil, plants, chemical fertilizers, biological fertilizers and other samples. However, there are subtle differences between them. Here we describe the difference between the three instruments TPY-6, TPY-6A, and TPY-6PC.