YSI Professional Plus Multiparameter Water Quality Meter
YSI Professional Plus Multiparameter Water Quality Meter
YSI Professional Plus Multiparameter Water Quality Meter

YSI Professional Plus Multiparameter Water Quality Meter

Pine Item #51659

PFAS Accepted Equipment

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, and temperature. Also a very powerful lab instrument for BODs, pH, and ORP.

Additional probes are available on request, which measure the following parameters: pH/ORP combination, ammonium (ammonia), nitrate, and chloride.

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

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.


Easy-to-install cable weights; can be daisy-chained for additional weight

Rubber over-molded IP-67 waterproof case

Rugged cables sensors and military-spec connectors

Scratch-resistant lens; viewable with polarized glasses

5000 data set memory

Detailed on-screen Help function

Interval or single-event logging

100 folder & site list data structure


pH Monitoring

Water Quality Monitoring

Quantity must be 1 or more
Equipment available for both rental and purchase
Request a Quote


Technical Specifications

Auto StableUser-defined auto-stable function holds stable readings on display when criteria is met
BarometerBuilt-in barometer
Buffer RecognitionAuto buffer recognition for US and NIST buffers
CertificationsRoHS CE WEEE C-Tick VCCI FCC IP-67 1-meter drop test Assembled in USA
ConnectivityUSB 2.0; ProComm II communications saddle and USB cable included; user-upgradeable software via USB and website
ConnectorMS (military spec) waterproof with bayonet lock
Data ManagementData Manager desktop software included; 100 user-defined folders
Data Memory5000 data sets (data date time user-defined info); 100 GLP files
DisplayGraphic display with detailed Help; backlit display AND keypad
DO Membrane Response Times\n(T95; 100%-0) and Flow Dependence1.25 mil PE = 8 seconds and 6 in/sec flow\n2.0 mil PE = 17 seconds and 3 in/sec flow\n1 mil Tefl on® = 18 seconds and 12 in/sec flow
DO SensorsPolarographic or galvanic field sensors; self-stirring polarographic BOD sensor for the lab
Field CablesStandard lengths of 1 4 10 20 or 30 meters - up to 100 meters on DO only cables; 4- through 30-meter cables include a cable management
Flow CellSingle dual and multiparameter Quatro cable all flow cell compatible
GLP ComplianceYes; detailed GLP information is stored and is available to view download or print
Lab CablesBOD sensor includes 2-meter cable; 1 or 4 meters on lab pH ORP and pH/ORP cables
LanguagesEnglish Spanish German French Italian Norwegian Portuguese Japanese Chinese (Simplified & Traditional)
Logging ModesSingle or Continuous
Operating Temperature-10 to 60°C
Power2 alkaline C-cells provide 80 continuous hours at ambient temperature without backlight; ProComm II saddle provides USB power or optional wa
Storage Temperature -20 to 70°C
User IDOptional user ID for data security
WaterproofIP-67 (even with the battery cover off); floats


Dimensions3.25 x 8.5 x 2.2183 w x 216 l x 56 d mm


Weight with Batteries1.05 lbs475 g
Manuals, Data Sheets & Software