Table 2.

Values of factory and own constants a₀ and a₁ for two-point ThetaProbe calibration equations for sand/soil materials.

Type of Conversion	Constants	Loose Packing (Sand)	Moderate Packing (Sand)	Compact Packing (Sand)	Moderate Packing (Soil)
Linear conversion of V output to $\sqrt{\epsilon }$	a0	1.46	1.47	1.49	1.72
	a1	5.29	7.06	8.1	9.02
Polynomial conversion of V output to $\sqrt{\epsilon }$	a0	1.54	1.56	1.58	1.85
	a1	5.34	7.02	7.88	7.96
Factory settings for mineral soils	a0	1.6
	a1	8.4