550

The YSI 550 handheld dissolved oxygen instrument is a rugged, microprocessor based, digital instrument with a field replaceable YSI dissolved oxygen probe.  The instrument is impact-resistant and waterproof.

The YSI 550 DO instrument is designed for field use and is available with cable lengths of 12 or 25 feet.  It is easily calibrated, and the microprocessor performs a self-diagnostic routine each time the instrument is turned on.

Medium

• Fresh, sea, or polluted water

Dissolved Oxygen Sensor

• Steady-state polarographic

Dissolved Oxygen Probe

• Field replaceable module

Accuracy

• +/- 0.3 mg/L or +/- 2% of reading, whichever is greater
• +/- 2% air saturation or +/- 2% of reading, whichever is greater
• +/- 0.2^o C

Range

• 0-20 mg/L
• 0-200% air saturation
• -5^o to 45^o C temperature

Resolution

• 0.01 mg/L
• 0.1% air saturation
• 0.1^o C temperature

Temperature Units

• Celsius or Fahrenheit, user selectable

Temperature Specifications

• Accuracy: +/- 0.3^o C
• Range: -5^o to 45^o C
• Resolution: 0.1^o C

Altitude Compensation

• Yes

Salinity Compensation

• Yes

Temperature Compensation

• Automatic

Power

• 4 alkaline C cells

Size

• 4.7" W x 9" L (11.9 cm x 22.9 cm)

Weight with Batteries

• 2 lbs. (0.91 kg)

Battery Life

• Over 2,000 hours at 25^o C

Manual: Download