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.

The Quatro cable attached to the Pro Plus allows you to
utilize 4-ports to measure temperature/conductivity, DO, and any two
ISEs among pH, ORP, ammonium, chloride, or nitrate creating an extremely
powerful handheld multiparameter instrument.

Toughest
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

Smartest
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:

• 5,000 data-set memory
• Detailed on-screen Help function*
• Free, Data Manager desktop software and ProComm II saddle*
• Interval or single-event logging
• 100 folder and 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
• Re-calibration 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. A convenient hand-strap 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.

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.