United Scientific 4-in-1 Soil Meter

This 4-in-1 soil meter is designed to monitor important conditions that affect the health of plants. You and your students can test for sunlight, moisture, pH, and temperature levels all in one convenient handheld device. 

It features a large, easy-to-read LCD screen, a low-battery indicator, and an 8 in. long probe that reaches root-deep into the soil.

Sunlight measurements:

• (LOW-)<500 Lux
• (LOW)500 to 5000 Lux
• (LOW+)5000 to 10,000 Lux
• (NOR-)10,000 to 25,000 Lux
• (NOR)25,000 to 60,000 Lux
• (NOR+)60,000 to 80,000 Lux
• (HGH-)80,000 to 100,000 Lux
• (HGH)100,000 to 120,000 Lux
• (HGH+)>120,000 Lux

Moisture measurements:

• (DRY+)<5%
• (DRY)5 to 10%
• (NOR)10 to 20%
• (WET)20 to 30% (WET+)>30%

pH measurements:

• Range: 3.5–9.0 (display resolution: 0.5)

Soil temperature measurements:

• Range: -9°C to +50°C (16°F to 122°F) (display resolution: 1°C/1°F)

Specifications:

• Overall dimensions: 13 in. L x 1.4 in. W
• Working current: <30mA
• Operating temperature:+5°C to +40°C (41°F to 104°F)
• Working humidity: 5% to 95% RH non-condensing
• Requires a 9V battery (not included)