Bootstrap Example

The YSI Professional Plus handheld multiparameter meter provides extreme flexibility for the measurement of a variety of combinations for dissolved oxygen, conductivity, specific conductance, salinity, resistivity, total dissolved solids (TDS), pH, ORP, pH/ORP combination, ammonium (ammonia), nitrate, chloride and temperature. Also a very powerful lab instrument for BODs, pH and ORP.


The Pro Plus instrument meets the demands of true field work. The instrument is rated to IP-67 standards even without the battery cover on. Other tough features include a 3-year warranty, Mil-spec connectors, rubber overmolded case, and a 2-year cable warranty. In-house testing procedures also include 1-meter drop tests from all angles to ensure expected field-durability.

Tough, Field Durability Features Include:

• Easy-to-install cable weights; can be daisy-chained for additional weight*
• Rubber, over-molded IP-67 waterproof case (even without the battery cover)*
• 3-year instrument warranty
• 2-year cable warranty*
• Rugged cables, sensors, and military-spec connectors*
• Drop-tested 1 meter at all angles*
• Scratch-resistant lens; viewable with polarized glasses
• Instrument floats
• Weighted, user-replaceable multi-sensor design


The instrument provides numerous benefits from the following features; 5,000 data-set memory, password protection, backlit display and keypad, graphic display with detailed Help functionality, re-cal prompts, user defined fields, detailed GLP, auto stable, Hold All Readings function, Data Manager software for the desktop, USB connection, auto-buffer recognition, and flexible folders and site lists for logging data.

Smart Features Include:

• Detailed on-screen Help function*
• Free, Data Manager desktop software and ProComm II saddle*
• Interval or single-event logging
• 100 folder & site list data structure*
• Password protection
• Detailed GLP data
• USB connection also powers the instrument
• 6-point cal with auto-buffer recognition*
• User-adjustable auto-stable with prompts*
• User-upgradeable software via waterproof USB port
• Recalibration prompts
• Search function filters user-defined data information*
• Backlit display AND keypad*
• Cable management kit included with all cables from 4- to 30-meters*

Most Versatile

Connect any Professional Series cable (excludes ODO cables) and probe option to the instrument and use the convenient cable management kit to keep everything simple and organized. Cable options range from 1-, 4-, 10-, 20-, and 30-meter choices (up to 100-meters on DO only cables). Use lab or field probes and switch between the two quickly. The Pro Plus makes an ideal lab BOD instrument with the proven self-stirring BOD probe (EPA Approved). A convenient handstrap can be used on either side of the instrument. A complete family of accessories also increases the versatility of the Pro Plus. Choose among accessories including carrying cases, flow cells, cable weight, belt clip, tripod, and c-clamp.

Interested in a Pro Series Product? Check out the trade in program currently going on (U.S. only). YSI now offers an Extended Warranty for the Pro Plus (new instruments only). Please visit the Professional Plus Kits page for fully assembled systems.

Added Versatility Features Include:

• Adjustable right- or left-handed hand strap*
• Multiple user-replaceable sensor options and a choice of DO sensors*
• Multiple parameter options and cable lengths
• Lab-grade ISE sensors and BOD probe available to make a true lab/field instrument
• Languages - English, Spanish, German, French, Italian, Norwegian, Portuguese, Japanese, Chinese (Simplified and Traditional)
• Wide array of accessories are available from flow cells, to shoulder straps, to carrying cases
• Free - Data Manager - Watch the Data Manager Demo Video

Data management can become a daunting task over time but with the Data Manager software this task is much simpler and efficient. Download data, configure instruments, and conduct real-time studies easily with Data Manager software. View data graphically or in tabular form and export data as needed to other programs. Data Manager software is a very powerful tool. So powerful in fact, that we give it to you at no charge when purchasing a Pro Plus. After all, it's all about the data!

When purchasing the Pro Plus you will receive the instrument, manual, batteries, communications saddle, USB cable, and Data Manager software. Cables and probes are ordered separately.

* feature or benefit only YSI offers on a handheld instrument.

Professional Plus Instrument General Specifications

• RoHS, CE, WEEE, C-Tick, VCCI, FCC, IP-67 (waterproof), 1-meter drop test, Assembled in USA
• USB 2.0 for data transfer and user-upgradeable instrument firmware. Communications saddle, USB cable and Data Manager software included• Connector: Metal MS (military spec) waterproof with bayonet lock
• Data Manager desktop software included. Minimum PC requirements - Windows 2000 with SP4 (minimum) or XP with SP2 (minimum), Vista 7 or Windows 8 | 300 MHz or higher Pentium-compatible CPU | 128 MB of RAM or higher | 80 MB or more of free hard-disk space
• Logging Capabilities: Single or Continuous
• Operating Temperature: -10 to 60°C
• Parameters Measured: Temperature, Dissolved Oxygen, pH, ORP/Redox, Conductivity, TDS, Ammonia, Ammonium, Nitrate, Chloride,Built-in barometer
• Storage Temperature: -20 to 70°C
• Unit of Measure: air saturation, Conductivity-mS/cm, Chloride-mg/L, mg/L, Temperature- °C, Dissolved Oxygen-%, pH-units, Barameter-mmHg, Salinity-ppt, Ammonium-mg/L-N, ORP-mV, Total Dissolved Solids(TDS)-g/L, Nitrate-mg/L-N, °F

Model Item Quantity Unit Price Line Total
Default Title - Professional Plus (Pro Plus) Multiparameter Instrument
$ 0.00
$ 0.00

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