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 & 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. 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.

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 handhled instrument.

Related Products
ProODO	Pro20	5000 / 5100	BOD Analyst Pro™

 

 

 

 

Professional Plus Instrument General Specifications

Auto Stable		User-defined auto-stable function holds stable readings on display when criteria is met
Barometer		Built-in barometer
Buffer Recognition		Auto buffer recognition for US and NIST buffers
Certifications		RoHS, CE, WEEE, C-Tick, VCCI, FCC, IP-67, 1-meter drop test, Assembled in USA
Connectivity		USB 2.0; ProComm II communications saddle and USB cable included; user-upgradeable software via USB and website
Connector		MS (military spec) waterproof with bayonet lock
Data Management		Data Manager desktop software included; 100 user-defined folders and site names Minimum PC requirements; Windows 2000 with SP4 (minimum) or XP with SP2 (minimum) 300 MHz or higher Pentium-compatible CPU 128 MB of RAM or higher 80 MB or more of free hard-disk space USB 2.0 Microsoft.NET (installed with Data Manager)
Data Memory		5,000 data sets (data, date, time, user-defined info); 100 GLP files
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)
Display		Graphic display with detailed Help; backlit display AND keypad
DO Membrane Response Times (T95; 100%-0) and Flow Dependence		1.25 mil PE = 8 seconds and 6 in/sec flow 2.0 mil PE = 17 seconds and 3 in/sec flow 1 mil Tefl on® = 18 seconds and 12 in/sec flow
DO Sensors		Polarographic or galvanic field sensors; self-stirring polarographic BOD sensor for the lab
Field Cables		Standard 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 kit
Flow Cell		Single, dual and multiparameter Quatro cable all flow cell compatible
GLP Compliance		Yes; detailed GLP information is stored and is available to view, download or print
Lab Cables		BOD sensor includes 2-meter cable; 1 or 4 meters on lab pH, ORP and pH/ORP cables
Languages		English, Spanish, German, French, Italian, Norwegian, Portuguese, Japanese, Chinese (Simplified & Traditional)
Logging Modes		Single or Continuous
Operating Temperature		-10 to 60°C
Power		2 alkaline C-cells provide 80 continuous hours at ambient temperature without backlight; ProComm II saddle provides USB power or optional wall power, cigarette lighter, and universal cell phone charger options
Storage Temperature		-20 to 70°C
User ID		Optional user ID for data security
Warranty		3-year instrument; 2-year field cables
Waterproof		IP-67 (even with the battery cover off); floats
Weight with Batteries		475 grams (1.05 lbs)

 

Professional Plus System Specifications (Cables & Sensors)

	Sensor Type	Range	Accuracy	Resolution	Units	Calibration
Dissolved Oxygen (%) (temp comp range -5 to 45°C)	Polarographic or Galvanic	0 to 500%	0 to 200% (± 2% of reading or 2% air saturation, whichever is greater) 200% – 500% (± 6% of reading)	1% or 0.1% air saturation (user selectable)	%	1 or 2-points with zero
Dissolved Oxygen (mg/L) (temp comp range -5 to 45°C)	Polarographic or Galvanic	0 to 50 mg/L	0 to 20 mg/L (± 2% of reading or 0.2 mg/L, whichever is greater) 20 – 50 mg/L (± 6% of reading)	0.1 or 0.01 mg/L (user selectable); 0.1% air saturation	mg/L, ppm	1 or 2-points with zero
Temperature (Field rugged cables)		-5 to 70°C	±0.2°C (±0.3°C cables over 45-meters)	0.1°C	°C, °F, K
Temperature (Lab-grade)*		0 to 40°C	±0.35°C	0.1°C	°C, °F, K
Conductivity**	Four electrode cell	0 to 200 mS/cm (auto range)	±0.5% of reading or 0.001 mS/cm, whichever is greater (1-, 4-m cable) ±1% of reading or 0.001 mS/cm, whichever    is greater (20-m cable)	0 to 0.500 mS/cm = 0.001 0.501 to 50.00 mS/cm = 0.01 50.01 to 200 mS/cm = 0.1 (range dependent)	µS, mS	1 point
Salinity	Calculated from conductivity and temperature	0 to 70 ppt	±1.0% of reading or 0.1 ppt, whichever is greater	0.01 ppt	ppt, PSU	1 point
pH	Glass Combination Electrode	0 to 14 units	±0.2 units	0.01 units	mV, pH units	1, 2, 3, 4, 5, or 6 point (user selectable);         US, NIST or Custom       Buffers
ORP	Platinum button	--1999 to +1999 mV	±20 mV in redox standards	0.1 mV	mV	1 point
Ammonium*** (ammonia with pH sensor)	Ion Selective Electrode	0 to 200 mg/L-N, 0 to 30°C	±10% of reading or 2 mg/L-N, whichever is greater	0.01 mg/L	mg/L-N, mV	1, 2, or 3 point (user selectable)
Nitrate***	Ion Selective Electrode	0 to 200 mg/L-N, 0 to 30°C	±10% of reading or 2 mg/L-N, whichever is greater	0.01 mg/L	mg/L-N, mV	1, 2, or 3 point (user selectable)
Chloride***	Ion Selective Electrode	0 to 1000 mg/L, 0 to 40°C	±15% of reading or 5 mg/L, whichever is greater	0.01 mg/L	mg/L-Cl-, mV	1, 2, or 3 point (user selectable)
Total Dissolved Solids (TDS)	Calculated from conductivity and temperature	0 to 100 g/L TDS constant range 0.30 to 1.00 (0.64 default)		0.001, 0.01, 0.1g/L	kg/L, g/L
Barometer	Piezoresistive	375 to 825 mmHg	±1.5 mmHg from 0 to 50°C	0.1 mmHg	mmHg, inHg, mbar, psi, kPa, ATM	1 point
Instrument Only Specifications (at Ambient Temperature)
pH		-2.60 to 16.60	±0.1 mV (0.01 pH units)	0.1 mV (0.01 pH units)
ORP		-1999 to +1999 mV	±0.5 mV	0.1 mV
Conductivity		0.0 to 200 mS/cm each range	±0.1% FS ±1 digit for µS/cm to 0.1 mS/cm (range dependent)	0.0001 mS/cm or 0.1
Dissolved Oxygen		0.00 to 90 mg/L; 0 to 550%	±0.2% FS (550% air saturation) ±1 digit (with 1.25 PE membrane at 10°C)	0.01 mg/L; 0.1% air saturation
Temperature		-10 to 100.00°C	±0.2% FS ±1 digit	0.1°C	°C, °F, K
*Lab-grade cables include 605107, -108, -109, 605177, -178, -179 ** Derived parameters can include resistivity, salinity, specifi c conductance, and total dissolved solids ***ISE sensors for freshwater only; 17-meter maximum depth

 

Ordering Guide

Step 1:	Order Instrument
Item #	Description
6050000	Instrument, includes Data Manager software, the ProComm II  communications saddle, and USB cable
Step 2:	Order Cable(s) All cables include temperature; cables 4- through 30-meters include cable management kit; cables with conductivity include sensor (no need to order conductivity sensor)
60510	1, 4, 10, 20 or 30 meter: ISE1/temp
60520	1, 4, 10, 20, 30 or up to100 meters2: DO/temp
60530	1, 4, 10, 20 or 30 meter: conductivity/temp
6051010	1, 4, 10, 20 or 30 meter: ISE/ISE/temp
6051020	1, 4, 10, 20 or 30 meter: ISE/DO/temp
6051030	1, 4, 10, 20 or 30 meter: ISE/conductivity/temp
6052030	1, 4, 10, 20 or 30 meter: DO/conductivity/temp
605790	1, 4, 10, 20 or 30 meter: ISE/ISE/DO/conductivity/temp
605107	1–meter single junction pH sensor & cable
605177	4–meter single junction pH sensor & cable
605108	1–meter single junction ORP sensor & cable
605178	4–meter single junction ORP sensor & cable
605109	1–meter single junction pH/ORP sensor & cable
605179	4–meter single junction pH/ORP sensor & cable
Step 3:	Order Sensor(s)
605202	Galvanic DO
605203	Polarographic DO
605780	Self-stirring BOD (2-meter cable included)
605101	pH (ISE)
605102	ORP (ISE)
605103	pH/ORP combination (ISE)3
605104	Ammonium (ISE)
605105	Chloride (ISE)
605106	Nitrate (ISE)
1 ISEs include pH, ORP, Ammonium, Nitrate, Chloride 2 Special order cables in 10-meter increments up to 100 meter available 3 Not recommended on 6051010 or 605790 cables. Only pH would appear.

 

Ordering Guide for Professional Plus Kits

Item #	Description	Included in Kit
603165	BOD Kit, US	Pro Plus meter, ProBOD self-stirring BOD probe, Lab Dock, US Power Supply (073035) and ProComm II power (605209)
603219	BOD Kit, INT	Pro Plus meter, ProBOD self-stirring BOD probe, Lab Dock, International power supply (073047) and ProComm II power (605210)
603166	BOD/pH Kit, US	Pro Plus meter, ProBOD self-stirring BOD probe, lab pH sensor (605107), Lab Dock, US power supply (073035) and ProComm II power (605209)
603220	BOD/pH Kit, INT	Pro Plus meter, ProBOD self-stirring BOD probe, lab pH sensor (605107), Lab Dock, International power supply (073047) and ProComm II power (605210)
603167	Pol DO Lab/Field Kit, 4-m, US	Pro Plus meter, ProBOD self-stirring BOD probe, 4-meter field cable with polarographic DO probe, Lab Dock, US power supply (073035) and ProComm II power (605209), soft-sided carrying case (603162)
603221	Pol DO Lab/Field Kit, 4-m, INT	Pro Plus meter, ProBOD self-stirring BOD probe, 4-meter field cable with polarographic DO probe, Lab Dock, International power supply (073047) and ProComm II power (605210), soft-sided carrying case (603162)
603178	Gal DO, 4-m	Pro Plus meter, 4-meter field cable with galvanic DO probe, soft-sided carrying case (603162)
603179	Pol DO, 4-m	Pro Plus meter, 4-meter field cable with polarographic DO probe, soft-sided carrying case (603162)
603180	Pol DO/Con, 4-m	Pro Plus meter, 4-meter field cable with polarographic DO probe and conductivity, soft-sided carrying case (603162)
603181	Gal DO/Con, 4-m	Pro Plus meter, 4-meter field cable with galvanic DO probe and conductivity, soft-sided carrying case (603162)
603182	Pol DO/Con, 10-m	Pro Plus meter, 10-meter field cable with polarographic DO probe and conductivity, soft-sided carrying case (603075)
603183	Gal DO/Con, 10-m	Pro Plus meter, 10-meter field cable with galvanic DO probe and conductivity, soft-sided carrying case (603075)
603184	Pol DO/pH, 4-m	Pro Plus meter, 4-meter field cable with polarographic DO probe and pH, soft-sided carrying case (603162)
603185	Gal DO/pH, 4-m	Pro Plus meter, 4-meter field cable with galvanic DO probe and pH, soft-sided carrying case (603162)
603186	Pol DO/pH, 10-m	Pro Plus meter, 10-meter field cable with polarographic DO probe and pH, soft-sided carrying case (603075)
603187	Gal DO/pH, 10-m	Pro Plus meter, 10-meter field cable with galvanic DO probe and pH, soft-sided carrying case (603075)
603188	pH/Con, 4-m	Pro Plus meter, 4-meter field cable with pH and conductivity, soft-sided carrying case (603162)
603189	pH/Con, 10-m	Pro Plus meter, 10-meter field cable with pH and conductivity, soft-sided carrying case (603075)
603190	Pol DO/pH/Con, 4-m	Pro Plus meter, 4-meter Quatro field cable with polarographic DO probe, pH and conductivity, soft-sided carrying case (603075)
603223	Pol DO/pH/ORP/Con, 4-m	Pro Plus meter, 4-meter Quatro field cable with polarographic DO probe, pH/ORP combo and conductivity, soft-sided carrying case (603075)
603191	Gal DO/pH/Con, 4-m	Pro Plus meter, 4-meter Quatro field cable with galvanic DO probe, pH and conductivity, soft-sided carrying case (603075)
603224	Gal DO/pH/ORP/Con, 4-m	Pro Plus meter, 4-meter Quatro field cable with galvanic DO probe, pH/ORP combo and conductivity, soft-sided carrying case (603075)

Manuals

YSI Professional Plus User Manual

Français - YSI ProPlus Guide d’utilisation

Deutsch - YSI ProPlus Bedienungsanleitung

Italiano - YSI ProPlus Manuale d'uso

Español - YSI ProPlus Manual del Usuario

日本 - YSI プロフェッショナル プラス 取扱説明書

Professional Plus Quick Start Guide

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

Tips, FAQs & Guides

Professional Plus Handheld Calibration Tips

Specification Sheets

YSI Professional Series Kits

YSI Professional Plus Quatro Cable Specifications

YSI Amplified pH and pH/ORP Sensors

YSI Professional Plus Water Quality Instrument Specifications

Français - YSI Professional Plus qualité de l'eau Spécifications de l'instrument

Español - YSI Professional Plus de Calidad del Agua de instrumentos Especificaciones

YSI BOD Analyst Pro™ Desktop Software

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

Application Notes

Oregon DEQ Uses the YSI Pro Plus in Groundwater Nitrate Study

Chronic Exposure Effects to Rainbow Trout from Nitrate Nitrogen

Kamchatka Peninsula: Where the Waters Run Free and Salmon Thrive

Understanding Ammonia in Aquaculture Pond Systems

YSI Multiparameter Handheld Used to Help Monitor a Forest Invader in Headwater Streams

Miami Conservancy District Uses Nitrate Screening as Conjunctive Management Tool

ORP Management in Wastewater as an Indicator of Process Efficiency

Dissolved Oxygen Management and Related Costs in Pond Aquaculture

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

Handheld Professional Plus Instrument Saves Time Measuring Ammonia in Aquaculture Ponds

Español - El portátil Professional Plus ahorra tiempo cuando no hay tiempo que perder

Technical Notes

How to Ensure Accurate and Successful BOD Measurements

MCERTS Certifications

MCERTS - YSI Professional Plus

Compliance Certifications

YSI Instruments EPA Compliance Guide

Webinars

Archived Webinar:
Making Better pH Measurements in Sampling and Long-Term Monitoring Applications

Original Broadcast: Tuesday, June 7, 2011 —1:00-2:00 PM Eastern Time (US)

 

		1001 Pro Series pH Sensor YSI 1001 pH sensor for the Professional Plus instrument.
		1002 Pro Series ORP (Redox) Sensor YSI 1002 ORP (redox)sensor for the Professional Plus instrument.
		1003 Pro Series pH/ORP Combo Sensor YSI 1003 pH/ORP (pH/redox) combination sensor for the Professional Plus instrument.
		1004 Pro Series Ammonium, NH4+ Sensor YSI 1004 ammonium, NH4+ sensor for the Professional Plus instrument.
		1005 Pro Series Chloride Sensor YSI 1005 chloride sensor for the Professional Plus instrument.
		1006 Pro Series Nitrate Sensor YSI 1006 nitrate sensor for the Professional Plus instrument.
		1007 Pro Series Lab pH Sensor and Cable YSI 1007 lab-grade pH sensor for the Professional Plus instrument.
		1008 Pro Series Lab ORP (Redox) Sensor and Cable YSI 1008 lab-grade ORP (Redox) sensor for the Professional Plus instrument.
		1009 Pro Series Lab pH/ORP Sensor and Cable YSI 1009 lab-grade pH/ORP (pH/Redox) sensor for the Professional Plus instrument.
		170 Electrode Stand The 170 electrode stand is ideal for a lab setting to hold the sensors during measurements.
		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.
		3682 Zobell ORP Calibration Solution YSI 3682 Zobell solution is used for calibrating ORP/Redox on several YSI instruments.
		3824 Assorted pH Buffers Case Various pH buffers for pH probe calibration.
		4654 Tripod This small 4654 tripod supports the instrument at a convenient viewing angle.
		5202 Pro Series Galvanic DO Sensor YSI 5202 Galvanic sensor for the Professional Plus and Pro20 DO instruments.
		5203 Pro Series Polarographic DO Sensor YSI 5203 Polarographic sensor for the Professional Plus and Pro20 DO instruments.
		5518 AC to Mini-USB Power Supply The AC power supply for the Pro Plus or ProODO instrument Pro Comm II communications saddles.  Powers the saddle and the instrument.
		5519 AC to Mini-USB Power Supply The AC power supply for the Pro Plus or ProODO instrument Pro Comm II communications saddles.  Powers the saddle and the instrument.  International version.
		5580 Confidence Solution® Never worry about the accuracy of your pH, ORP, or conductivity data again! Ensure probe performance with the 5580 Confidence Solution®.
		5906 DO Cap Membrane Kit YSI 5906 screw-on cap dissolved oxygen membranes.
		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.
		5912 DO Cap Membrane Kit YSI 5912 screw-on cap dissolved oxygen membranes for galvanic sensors.
		5912 DO Cap Membrane Kit YSI 5914 screw-on cap dissolved oxygen membranes for galvanic sensors.
		5913 DO Cap Membrane Kit YSI 5913 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.
		60510 Pro Series ISE Cable The 60510 is a 1-port cable for use with the Professional Plus instrument. The port requires a ISE probe.
		6051010 Pro Series ISE/ISE Cable The 6051010 is a 2-port combo cable for use with the Professional Plus instrument. The 2-ports require ISE probes.
		6051020 Pro Series ISE/DO Cable The 6051020 is a 2-port combo cable for use with the Professional Plus instrument. The 2-ports require a ISE and a DO probe.
		6051030 Pro Series ISE/Conductivity Cable The 6051030 is a 1-port combo cable for use with the Professional Plus instrument. The 1-port requires a ISE probe while the conductivity is built right into the cable.
		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.
		6052030 Pro Series DO/Conductivity Cable The 6052030 is a 1-port combo cable for use with the Professional Plus instrument. The 1-port requires a DO probe while the conductivity is built right into the cable.
		60530 Pro Series Conductivity Cable The 60530 cable allows for the measurement of conductivity, specific conductance, salinity, total dissolved solids and temperature.
		605790 Pro Plus Quatro Cable The Quatro is a 4-port cable for use with the Professional Plus instrument. Create a powerful multiparameter sampling instrument.
		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.
		655563 Amplified Sensors Extension Adapter Extension adapter for the 556 cables and Pro Series dual port cables 1010 and 1020.
		6850 Quatro Cable Flow Cell YSI 6850 flow cell for the Pro Series Quatro cable.
		690 Cable Weight The 690 cable weight attaches to the end of the probe guard. Ideal for longer cables to ensure you reach the depths you need.
		691 Cable Weight The 691 cable weight attaches to the end of the probe guard. Ideal for longer cables to ensure you reach the depths you need.
		Ammonium Calibration Solutions Ammonium solutions to calibrate your field instruments equipped with ammonium ISE sensors.
		Conductivity Calibration Solutions NIST-traceable conductivity solutions to calibrate both field instruments and lab instruments and cells together for maximum accuracy.
		Nitrate Calibration Solutions Nitrate solutions to calibrate your field instruments equipped with a nitrate sensor.
		Pro1001A Amplified pH Sensor Amplified pH sensor for the YSI Pro Series instruments.
		Pro1001A Kit Amplified pH/ORP Combination Amplified pH/ORP sensor kit for the YSI Pro Series instruments.
		Pro1003A Amplified pH/ORP Combination Sensor Amplified pH/ORP combination sensor for the YSI Pro Series instruments.
		Pro1003A Kit Amplified pH/ORP Combination Sensor Amplified pH/ORP combination sensor kit for the YSI Pro Series instruments.
		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.