• Economical and easy to use
• Built-in barometer improves accuracy and eliminates manual entry
• Rugged‚ impact-resistant IP67 waterproof case

Pro20i meters deliver DO measurements you can trust. They feature simple on-screen instructions‚ and one-touch DO calibration that works in just 3 seconds! Built-in barometer provides automatic pressure compensation for improved accuracy and elimination of manual entries. Internal memory stores up to 50 data sets for later recall.

Graphic backlit display and glow-in-the-dark keypad allow easy visibility in low-light conditions. Display shows auto-ranging‚ Hold function and battery indicator. IP67 rubber over-molded case and military specification connectors stand up to harsh conditions—passes the 1-meter drop test.

Meters comes complete with a galvanic probe (no warm-up required) and 4-m cable assembly.

Includes: probe, cable assembly, hand strap, two C batteries and instructions. 3-year meter warranty; 2-year cable warranty; 6-month galvanic probe warranty.

• Dissolved oxygen range: 0 to 50 mg/L (0 to 500% air saturation)
• Dissolved oxygen resolution: 0.1 or 0.01 mg/L (%); user selectable
• Dissolved oxygen accuracy: ±0.2 mg/L (%) or ±2% of measurement; >20 mg/L (>200%); ±6% of measurement
• Temperature range: -5 to 55°C
• Temperature resolution: 0.1°C
• Temperature accuracy: ±0.3°C
• Barometric pressure range: 400 to 999.9 mm Hg
• Barometric pressure resolution: 0.1 mm Hg
• Barometric pressure accuracy: ±5 mm Hg within ±5°C of calibration point
• Manual functions: Salinity compensation (0 to 70 ppt)
• Automatic functions: Altitude compensation, Temperature compensation
• Memory function: 50 data sets
• RS-232: no