The YSI Pro20 dissolved oxygen meter is a rugged, user-friendly instrument for dissolved oxygen measurement.  The Pro20 can be used in the lab or the field and can go from one to the other in seconds.

Interested in a Pro Series Product? Check out the trade in program currently going on (U.S. only).

User-replaceable sensors and cables and convenient One Touch Cal feature makes it extremely user friendly. Mil-spec (military spec) connectors, IP-67 waterproof and rubber over molded case, and 1-meter drop tests ensure the instrument remains in your hands to provide years of sampling even in the harshest field conditions. The feature set of the Pro20 results in a low total cost of ownership over the life of the product.

Fast response times with the Polarographic or Galvanic dissolved oxygen sensors allow you to complete your sampling routine quickly. The long life of the Polarographic sensor saves time and money and reduces your overall cost. The Galvanic sensor enables you to start sampling immediately without a warm-up period. Either sensor you choose for the field will give you accurate, quality data.

Additional features include:

• Internal barometer for highest accuracy
• Choose field DO sensors (Polarographic or Galvanic) or lab BOD probe for BOD in wastewater
• One Touch Cal calibrates within 3 seconds with the push of a button
• Stores 50 data sets
• Graphic, backlit display and glow in the dark keypad
• Available with 1, 4, 10, 20, 30 or 100-meter cables
• View display with polarized sunglasses on
• Fastest response time on the market with 95% response in 8 seconds with standard membrane
• Multiple languages include English, Spanish, French and German
• User replaceable sensors and cables
• 3-year instrument; 2-year cable warranty

Lab or field - the Pro20 is ready for whatever you need when it comes to oxygen meters.

When ordering the YSI Pro20 you must order the instrument, cable, and dissolved oxygen probe separately, allowing you to choose the system that best fits your application.

If you're interested in learning more about optical dissolved oxygen technology and the YSI ProODO optical DO instrument please visit the ProODO page.

Please visit our extensive dissolved oxygen resource page to learn about all things DO and BOD related; www.YSI.com/weknowDO.

You can also download The Dissolved Oxygen Handbook covering all things DO related from technologies, to maintenance and calibrations, and acquiring the best data.

Related Products
Professional Plus	ProODO	5000 / 5100	BOD Analyst Pro™

 

 

 

 

Pro20 Instrument General Specifications

Barometer	Built-in barometer
Cable Lengths*	1- 4- 10- 20- 30- and 100-m lengths (special order up to 100-m) (3.28, 13.1, 32.8, 65.6, 98 ft.)
Certifications	RoHS, CE, WEEE, IP-67, 1-meter drop test
Connector	MS (military spec) waterproof with bayonet lock
Data Memory	50 data sets
Dimensions	8.3 cm width x 21.6 cm length x 5.6 cm depth (3.25 in x 8.5 in x 2.21 in)
Languages	English, Spanish, German, French
Power	2 alkaline C-cells providing 450 hours of battery life; low battery indicator
Salinity Input Range	0-70 ppt; manual (automatically compensates for manual input value)
Warranty	3-year instrument; 2-year cable; 1-year Polarographic sensors; 6-months Galvanic sensors
Waterproof	IP-67 (even with the battery cover off)
Weight with Batteries	475 grams (1.05 lbs)
* Special order cable lengths up to 100-meters in 10-meter increments available.

 

Pro20 System Specifications (Instrument with Cable & Probe)

	Sensor Type	Range	Accuracy	Resolution
Dissolved Oxygen (%)	Polarographic or Galvanic	0 to 500% air saturation	0 to 200% air saturation, ± 2% of the reading or  ±2% air saturation,      whichever is greater; 200 to 500% air saturation, ± 6% of the reading	0.1% or 1% air saturation (user selectable)
Dissolved Oxygen (mg/L)	Polarographic or Galvanic	0 to 50 mg/L	0 to 20 mg/L, ± 2% of the reading or  ±0.2 mg/L, whichever is greater;   20 to 50 mg/L, ± 6% of the reading	0.01 or 0.1 mg/L (user selectable)
Temperature		-5 to 55°C (0 to 45°C; DO compensation range for mg/L )	±0.2°C (±0.3°C cables over 45-meters)	0.1°C
Barometer		400 to 999.9 mmHg	± 5 mm Hg within ± 5°C temperature range from calibration point	0.1 mm Hg

 

Ordering Guide

Item #	Description
6050020	Pro20 Handheld instrument
60520-1	1-m cable for DO/temp
60520-4	4-m cable for DO/temp (includes cable management kit)
60520-10	10-m cable for DO/temp (includes cable management kit)
60520-20	20-m cable for DO/temp (includes cable management kit)
60520-30	30-m cable for DO/temp (includes cable management kit)
60520-100	100-m cable for DO/temp
605780	Self-stirring BOD probe with 2-m (6 ft.) cable included
605202	Galvanic Sensor for any cable
605203	Polarographic Sensor for any cable

 

Ordering Guide for Pro20 Kits

Item #	Description	Included in Kit
603168	BOD Kit, US	Pro20 meter, ProBOD self-stirring BOD probe, Lab Dock , US power supply (073035)
603222	BOD Kit, INT	Pro20 meter, ProBOD self-stirring BOD probe, Lab Dock, International power supply (073047)
603169	Pol DO Lab/Field, 4-m	Pro20 meter, ProBOD self-stirring BOD probe, 4-meter field cable with polarographic DO probe, Lab Dock, US power supply (073035), soft-sided carrying case (603162)
603170	Gal DO, 4-m	Pro20 meter, 4-meter field cable with galvanic DO probe, soft-sided carrying case (603162)
603171	Pol DO, 4-m	Pro20 meter, 4-meter field cable with polarographic DO probe, soft-sided carrying case (603162)
603172	Gal DO, 10-m	Pro20 meter, 10-meter field cable with galvanic DO probe, soft-sided carrying case (603162)
603173	Pol DO, 10-m	Pro20 meter, 10-meter field cable with polarographic DO probe, soft-sided carrying case (603162)

Manuals

Pro20 Pocket Guide

YSI Pro20 User Manual

Français - YSI Pro20 User Manual - Rev B

Deutsch - YSI Pro20 User Manual - Rev B

Español - YSI Pro20 User Manual - Rev B

5905, 5010, 200-BOD, and Pro-BOD Probe Instruction Manual

Tips, FAQs & Guides

Model Pro20 vs 55 Comparison Guide

Specification Sheets

YSI Professional Series Kits

Dissolved Oxygen Meter Specification Sheet for the YSI Pro20 Portable DO Meter

Español - Dissolved Oxygen Meter Specification Sheet for the YSI Pro20 Portable DO Meter

Catalogs & Brochures

BOD Testing

Groundwater Applications & Capabilities

Water Quality Sampling for Field and Laboratory

Wastewater - Water Quality Capabilities & Solutions

Aquaculture Applications, Capabilities & Solutions

Español - Piscicultura Aplicaciones, Competencia y Soluciones

Water Monitoring Solutions

News Briefs

Dissolved Oxygen Meters: Features to Consider Beyond Sensor Technology when Selecting a DO Meter

Español - Cómo elegir el oxímetro más adecuado para usted - YSI Pro20 v 55

Application Notes

Dissolved Oxygen Management and Related Costs in Pond Aquaculture

Español - Gestión del Oxígeno Disuelto y costes relacionados en estanques de piscicultura

Technical Notes

How to Ensure Accurate and Successful BOD Measurements

Compliance Certifications

YSI Instruments EPA Compliance Guide

 

		2002 Pro Series Galvanic DO Sensor YSI 2002 Galvanic sensor for the Professional Plus and Pro20 DO instruments.
		2003 Pro Series Polarographic DO Sensor YSI 2003 Polarographic sensor for the Professional Plus and Pro20 DO instruments.
		3056 Flow Cell Mounting Spike The mounting spike simply attaches to the base of the 3059 or 3077 flow cell to stabilize the flow cell on the ground.
		3059 Flow Cell, Standard 203 mL Standard flow cell. 203 mL. Easily disassembles for complete cleaning. Can be used with the Pro Series single or dual-parameter cables, 556, or 600XL and 600XLM instruments.
		3062 Cable Management Kit Easily manage your cables. Also attaches to the back of the instrument to create a very compact system.
		3069 Belt Clip Easily attach any Pro Series, 556, or 650 instrument to your belt or other convenient location with this simple clip.
		3074 Hard-Sided Carrying Case The 3074 hard-sided carrying case ideal for all Pro Series products.
		3075 Soft-Sided Carrying Case A soft-sided carrying case ideal for all Pro Series products. Cable management kits easily attach to the outside of the case keeping the inside clean and dry.
		3076 Extended Length Flow Cell Extneded length flow cell for Pro Series single or dual port cables
		4654 Tripod This small 4654 tripod supports the instrument at a convenient viewing angle.
		5908 DO Cap Membrane Kit YSI 5908 screw-on cap dissolved oxygen membranes.
		5909 DO Cap Membrane Kit YSI 5909 screw-on cap dissolved oxygen membranes.
		5913 DO Cap Membrane Kit YSI 5913 screw-on cap dissolved oxygen membranes for galvanic sensors.
		5914 DO Cap Membrane Kit YSI 5914 screw-on cap dissolved oxygen membranes for galvanic sensors.
		5978 Cable Weight The 5978 cable weight attaches to the end of the probe guard. Ideal for longer cables to ensure you reach the depths you need.
		603070 Pro Series Shoulder Strap Easily attach any Pro Series instrument to the shoulder strap to keep your instrument secure and safe when sampling.
		603168 Pro20 BOD Lab Kit US Pro20 meter, BOD probe, Lab dock, US power supply
		603169 Pro20 4-Meter Lab and Field Kit Polarographic US Pro20 meter, BOD probe, 4-meter cable with Polarographic DO, Lab dock, US power supply, carrying case, cable management kit
		603170 Pro20 4-Meter Field Kit Galvanic Pro20 meter, 4-meter cable with Galvanic DO probe, carrying case, cable management kit
		603171 Pro20 4-Meter Field Kit Polarographic Pro20 meter, 4-meter cable with Polarographic DO probe, carrying case, cable management kit
		603172 Pro20 10-Meter Field Kit Galvanic Pro20 meter, 10-meter cable with Galvanic DO probe, carrying case, cable management kit
		603173 Pro20 10-Meter Field Kit Polarographic Pro20 meter, 10-meter cable with Polarographic DO probe, carrying case, cable management kit
		603222 Pro20 BOD Lab Kit International Pro20 meter, BOD probe, Lab dock, International power supplies
		60520 Pro Series DO Cable The 60520 is a 1-port cable for use with the Professional Plus or Pro20 instrument. The port requires a DO probe.
		614 Ultra Clamp This small clamp supports the instrument at a convenient viewing angle. Ideal for attaching the instrument to the gunwale of a boat, table, or and surface with an edge to clamp to.
		6262 Small, Soft-Sided Carrying Case A compact, convenient, soft-sided carrying case ideal for all Pro Series products with cables up to 10-meters (4-meters for the Quatro cable).
		626444 Lab Dock This dock is ideal in the laboratory, when connecting to Data Manager desktop software, or just storing the instrument for the next trip to the field.  Can be used with the instrument or instrument and Pro Comm II communications saddle.
		ProBOD Self-Stirring BOD Probe The ProBOD self-stirring BOD probes are designed to fit into standard U.S. style 300 mL BOD bottles with various funnels available for use with other tapers.