Details

---

The Pro20i is a handheld instrument for dissolved oxygen and temperature with an integral (non-detachable) cable. It is a direct replacement for the discontinued Model 55 and 550A instruments. Available YSI-compatible sensors are EPA-approved for reporting DO in wastewater compliance. Instrument, cables, probes/sensors included.

Explore the ProSolo for an optical dissolved oxygen handheld.

Specifications
Cable Options	1- 4- 10-m lengths (3.28, 13.1, 32.8 ft.)
Certification	RoHS, CE, WEEE, IP-67 waterproof, 1-meter drop test
Languages	English, Spanish, German, French
Memory	50 data sets
Power	2 alkaline C-cells providing ~400 hours of battery life (without backlight); low battery indicator when 1 hour is left
Size	8.3 cm width x 21.6 cm length x 5.6 cm depth (3.25 in. x 8.5 in. x 2.2 in.)
Warranty	3-year instrument; 2-year cable; 1-year polarographic sensors; 6-month galvanic sensors
Weight	475 grams (1.05 lbs.) (with batteries)

The YSI Pro20i dissolved oxygen meter is a rugged, user-friendly instrument for measuring dissolved oxygen. Depending on your needs, you can choose between a user-replaceable Polarographic DO sensor or a Galvanic DO sensor.

Top Features

• Integral (built-in) field cable in 1, 4, and 10-meter variations with user-replaceable DO sensors
• One Touch Cal for convenient and quick calibration
• Choice of DO sensor (Polarographic or Galvanic) 
• Military spec connectors, IP-67 waterproof, and 1-meter drop tested
• Rubber over-molded case
• Low total cost of ownership
• Internal barometer for highest accuracy
• 95% response in 8 seconds with standard membrane
• Stores 50 data sets
• Graphic, backlit display and glow-in-the-dark keypad visible with polarized sunglasses on
• Multiple languages include English, Spanish, French, and German
• 3-year instrument warranty; 2-year cable warranty; 1-year polarographic sensor warranty; 6-month galvanic sensor warranty