เครื่องวัดปริมาณธาตุอาหารในดิน รุ่น HI98331

The HI98331 Soil Test™ is a pocket tester specifically designed to directly measure soil electrolytic conductivity (EC) and temperature for quick and accurate readings. With a compact size, single button operation, and automatic calibration, Soil Test is an excellent choice for taking direct conductivity measurements in soil eliminating the need to create soil slurries.

• Allows for direct measurement in soil
• 4.5″ Stainless Steel Penetration Electrode
• Automatic Temperature Compensation

Features

Selectable units for conductivity measurements are μS/cm, mS/cm, or dS/m

One-point calibration to 1413 µS/cm conductivity standard

Uses a fixed 2%/^oC temperature correction coefficient

Stainless steel penetration electrode

Waterproof casing

Understanding EC

Electrolytic conductivity (EC) is a measurement made in which electrical charges of particles in a medium are moved under the influence of a potential difference. EC is a measure of concentration, however, it is non-specic for ion type. An ion is a charged particle present in the solution that contributes to the current flow. Ions are formed when a salt such as sodium chloride is dissolved in water to form particles having electrical charges. Sodium chloride, separates into Na⁺ and Cl^–

Electrical conductance, the ability of a substance to conduct an electrical current is the reciprocal of electrical resistance. “Conductance” and “Resistance” depend on the geometrical dimensions of the substance being measured. Conductivity and resistivity are “normalized” terms that are used to denote a bulk intrinsic property of a substance. This is the measurement a standardized EC probe on a Conductivity or resistivity meter provides. Conductivity measurements can be used to provide additional industry specific measurements; TDS, Salinity and USP compliant conductivity. Many of Hanna’s meters provide these measurements also.

Manual : Download

Specification 

SKU	HI98331
Product Name	Soil Test™ Direct Soil EC Tester – HI98331
Quote Required	Yes
EC Range	0 to 4000 μS/cm; 0.00 to 4.00 mS/cm (dS/m)
EC Resolution	1 μS/cm; 0.01 mS/cm (dS/m)
EC Accuracy	±50 μS/cm (0 to 2000 μS/cm), ±300 μS/cm (2000 to 4000 μS/cm); ±0.05 mS/cm (0.00 to 2.00 mS/cm), ±0.30 mS/cm (2.00 to 4.00 mS/cm)
EC Calibration	automatic, one-point at 1.41 mS/cm
EC/TDS Temperature Compensation	automatic, temperature coefficient (β) fixed 2% / °C
Temperature Range	0.0 to 50.0°C
Temperature Resolution	0.1°C
Temperature Accuracy	±1°C
EC/TDS Probe	114 mm (4.5 “) Stainless steel penetration
Battery Type/Life	CR2032 Li-ion approximately 100 hours of continuous use
Environment	0 to 50°C (32 to 122°F); RH max 95% non-condensing
Dimensions	50 x 196 x 21 mm (2.0 x 7.7 x 0.9“)
Weight	74 g (2.4 oz.)
Ordering Information	HI98331 is supplied with a stainless steel penetration probe, batteries, and instrument quality certificate.
SKU	HI98331
Product Name	Soil Test™ Direct Soil EC Tester – HI98331
Quote Required	Yes
EC Range	0 to 4000 μS/cm; 0.00 to 4.00 mS/cm (dS/m)
EC Resolution	1 μS/cm; 0.01 mS/cm (dS/m)
EC Accuracy	±50 μS/cm (0 to 2000 μS/cm), ±300 μS/cm (2000 to 4000 μS/cm); ±0.05 mS/cm (0.00 to 2.00 mS/cm), ±0.30 mS/cm (2.00 to 4.00 mS/cm)
EC Calibration	automatic, one-point at 1.41 mS/cm
EC/TDS Temperature Compensation	automatic, temperature coefficient (β) fixed 2% / °C
Temperature Range	0.0 to 50.0°C
Temperature Resolution	0.1°C
Temperature Accuracy	±1°C
EC/TDS Probe	114 mm (4.5 “) Stainless steel penetration
Battery Type/Life	CR2032 Li-ion approximately 100 hours of continuous use
Environment	0 to 50°C (32 to 122°F); RH max 95% non-condensing
Dimensions	50 x 196 x 21 mm (2.0 x 7.7 x 0.9“)
Weight	74 g (2.4 oz.)
Ordering Information	HI98331 is supplied with a stainless steel penetration probe, batteries, and instrument quality certificate.