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PROFESSIONAL PLUS MULTIPARAMETER WATER QUALITY METER
Multi-parameter meter for monitoring up to thirteen different water quality parameters
Multiparameter water quality meter FEATURES:
  • 3-year instrument warranty
  • 2-year cable warranty
  • Rubber, over-molded IP-67 waterproof case (even without the battery cover)
  • Rugged cables, sensors, and military-spec connectors
  • 5,000 data set memory
  • 6-point pH cal with auto-buffer recognition
  • Multiple user-replaceable sensor options and a choice of DO sensors
  • Multiple parameter options and cable lengths
To Order Call 1-800-876-1172
Multiparameter Water Quality Meters Options & Prices
On this page:
Multiparameter Water Quality Meter Description
Multiparameter Water Quality Meter Specifications
Multiparameter Water Quality Meter Options & Prices
Downloads (PDF):
Multiparameter Water Quality Meter Brochure
Multiparameter Water Quality Meter Quick Sheet
Multiparameter Water Quality Meter Manual*

*May take several minutes to download, depending on your internet connection speed.
Additional Information:
Groundwater monitoring
Measuring hardness using TDS or Conductivity measurments
Multiparameter Water Quality Meter electrode calibration explained
Product Support
Multiparameter Water Quality Meter Description
The Professional Plus multiparameter water quality meter brings laboratory accuracy and the ease of push-button operation to water quality measurement in the field.  The multiparameter water quality meter can measure thirteen parameters: pH, ORP, temperature, dissolved oxygen, conductivity, total dissolved solids (TDS), salinity, resistivity, specific conductance, ammonium, nitrate, chloride, and barometric pressure.   Featuring a powerful sensor probe and state-of-the-art functions, the multiparameter water quality meter makes it easy to get highly reliable water quality data simply and quickly just by submersing the sensor in the water.  The multiparameter water quality meter's display case has a waterproof design that allows you to work without concern of splashing or accidentally dropping the instrument in the water.  The multiparemeter water quality meter is flexible enough to use for checking the quality of a broad range of water samples, from factory effluent to urban drainage, river water, lake and marsh water, aquatic culture tanks, agricultural water supplies, and sea water.

Multiparameter Water Quality Meter Display Case
The Pro Plus multiparameter water quality meter meets the demands of true field work.  The multiparameter water quality meter is not only rated to IP-67 standards even without the battery cover on, it also floats.  A rubber overmolded case and an adjustable right or left handed strap provide the multiparameter water quality meter with superior grip and handling.  The multiparameter water quality meter's viewing screen is scratch-resistant and gives you the ability to view your data through polarized sunglasses.  Both the display and keypad are backlit allowing you take multiparameter water quality measurements in low light conditions or even in the dark.  The cable connection between the multiparameter water quality meter's display case and sensor head is made from Mil-spec connectors providing you with the most reliable sensor connection possible.  In-house testing procedures also include 1-meter drop tests from all angles to ensure expected field-durability for the multiparameter water quality meter.

Multiparameter water quality meter sensor

Multiparameter water quality meter sensor head

Multiparameter Water Quality Meter Sensor
The Pro Plus multiparameter water quality meter's rugged four port Quatro cable and sensor housing allows you to choose up to three sensors from the eight available, giving you access to recording thirteen different parameter measurements.  Sensors available for the four port Quatro cable assembly include Galvanic DO, Polarographic DO, and any two ISEs among pH, ORP, pH/ORP combination, ammonium, chloride, or nitrate creating an extremely powerful handheld multiparameter water quality meter.  NOTE: A temperature/conductivity sensor is built into each multiparameter water quality meter sensor assembly.  Cable options for the multiparameter water quality sensor range from 1, 4, 10, 20, and 30-meter choices.  Cable lengths of 4 meters or greater include a convenient cable management kit to keep everything simple and organized.  Multiparameter water quality sensor cables are easily swapped to allow for different measurement conditions.

Multiparameter Water Quality Meter Datalogger
Up to 5,000 data sets can be recorded in the Pro Plus multiparameter water quality meter's memory.  The multiparameter water quality meter can be programmed for either interval or single event logging.  The data is stored in a 100 folder and site list data structure allowing you to organize your data as you see fit.  A search function gives you the ability to filter the multiparameter water quality meter's data.  The powerful free Data Manager computer software allows you to download your data, configure the multiparameter water quality meter, and easily conduct real-time studies.  The multiparameter water quality meter's software allows you to view data graphically or in tabular form and export data as needed to other programs.  A built in waterproof USB port allows you to communicate with, power, and update the multiparameter water quality meter.

Multiparameter Water Quality Meter Software
The Pro Plus multiparameter water quality meter's software has many useful features.  Multiple lanugages are supported by the multiparameter water quality meter including English, Spanish, German, French, Italian, Norwegian, Portuguese, Japanese, and Chinese (simplified and traditional).  The water quality meter is password protected and supports Good Laboratory Practice (GLP) file storage giving you the ability to see sensor calibration and diagnostic information.  Two user defined fields allow you to enter information such as weather conditions, elevation, or any other pertinent information.  The software automatically prompts you to recalibrate your multiparameter water quality meter's sensors.  The multiparameter water quality meter's sensor calibration software automatically recognizes buffers and provides you with the ability to calibrate up to six points giving you the ability to make highly accurate measurements.  A visual automatic stability feature lets you know when the multiparameter water quality meter's sensor reading can be considered good to record.  A hold all readings function works with the automatic stability feature to freeze the multiparameter water quality meter's sensor reading once it is determined to be stable.  Best of all the multiparameter water quality meter provides you with detailed on-screen help functions immediately at your fingertips so you don't have to remember all the details.
Multiparameter Water Quality Meter Specifications
  Sensor Type Range Accuracy Resolution Units Calibration
Dissolved Oxygen (%) (temp comp range 23 to 113°F (-5 to 45°C)) Polarographic or Galvanic 0 to 500% 0 to 200% (± 2% of reading or 2% air saturation, whichever is greater)
200% to 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 23 to 113°F (-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 to 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 N/A 23 to 158°F (-5 to 70°C) ±0.4°F (±0.2°C) 0.2°F (0.1°C) °F, °C, K N/A
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
Specific Conductance Calculated from conductivity and temperature 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
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) N/A 0.001, 0.01, 0.1g/L kg/L, g/L N/A
Resistivity Calculated from conductivity 5 to Inf. ohm-cm ±0.5% of reading (1-, 4-m cable)
±1% of reading (20-m cable)
5.00 to 10.96 ohm-cm = 0.001
20.2 to 1996 ohm-cm = 0.01
2000 to Inf. ohm-cm = 0.1
(range dependent)
ohm-cm, kohm-cm, or Mohm-cm 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-N, whichever is greater 0.01 mg/L mg/L-N, mV 1, 2, or 3 point (user selectable)
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
***ISE sensors for freshwater only; 55 foot (17 meter) maximum depth

Pro Plus multiparameter water quality meter
pH (At ambient temperature):
     Range: -2.60 to 16.60
     Accuracy: ±0.1 mV (0.01 pH units)
     Resolution: 0.1 mV (0.01 pH units)
ORP (At ambient temperature):
     Range: -1999 to +1999 mV
     Accuracy: ±0.5 mV
     Resolution: 0.1 mV
Conductivity (At ambient temperature):
     Range: 0.0 to 200 mS/cm each range
     Accuracy: ±0.1% FS ± digit for µS/cm to 0.1 mS/cm (range dependent)
     Resolution: 0.0001 mS/cm or 0.1
Dissolved Oxygen (At ambient temperature):
     Range: 0.00 to 90 mg/L; 0 to 550%
     Accuracy: ±0.2% FS (550% air saturation) ±1 digit (with 1.25 PE membrane at 10°C)
     Resolution: 0.01 mg/L; 0.1% air saturation
     Membrane Response Time (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 Teflon® = 18 seconds and 12 in/sec flow
Temperature (At ambient temperature):
     Range: -10 to 100.00°C
     Accuracy: ±0.2% FS ±1 digit
     Resolution: 0.1°C
Barometer: Built-in barometer
Buffer Recognition: Auto buffer recognition for US and NIST buffers
Auto Stable: User-defined auto-stable function holds stable readings on display when criteria is met
Display: Graphic display with detailed Help; backlit display AND keypad
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
Cable Connector: MS (military spec) waterproof with bayonet lock
Data Memory: 5,000 data sets (data, date, time, user-defined info); 100 GLP files
GLP Compliance: Yes; detailed GLP information is stored and is available to view, download or print
Languages: English, Spanish, German, French, Italian, Norwegian, Portuguese, Japanese, Chinese (Simplified & Traditional)
Logging Modes: Single or Continuous
Connectivity: USB 2.0; ProComm II communications saddle and USB cable included; user-upgradeable software via USB and website
Operating Temperature: -10 to 60°C
Storage Temperature: -20 to 70°C
User ID: Optional user ID for data security
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
IP Rating: IP-67 (even with the battery cover off); floats
Certifications: RoHS, CE, WEEE, C-Tick, VCCI, FCC, IP-67, 1-meter drop test, Assembled in USA
Warranty: 3-year instrument; 2-year field cables
Weight with Batteries: 475 grams (1.05 lbs)
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)

Pro Plus Multiparameter Water Quality Meter Computer Software
Data Management (software included):
     100 user-defined folders and site names
     Minimum PC requirements
  • Windows 2000 with SP4 (minimum), XP with SP2 (minimum), or 7
  • 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)
Multiparameter Water Quality Meter Options & Prices
Prices listed are for United States and Canada only.  Call or e-mail us for pricing in other countries.
Terms and Conditions

Pro Plus Multiparameter Water Quality Meter Kit 1 (PN# DIDD00)
Includes Pro Plus meter, 4-meter Quatro field cable with polarographic DO probe, pH, and conductivity, and soft-sided carrying case (DID405).
Quote
Pro Plus Multiparameter Water Quality Meter Kit 2 (PN# DIDD10)
Includes Pro Plus meter, 4-meter Quatro field cable with polarographic DO probe, pH/ORP combo, and conductivity, and soft-sided carrying case (DID405).
Quote
Pro Plus Multiparameter Water Quality Meter Kit 3 (PN# DIDD20)
Includes Pro Plus meter, 4-meter Quatro field cable with galvanic DO probe, pH, and conductivity, and soft-sided carrying case (DID405).
Quote
Pro Plus Multiparameter Water Quality Meter Kit 4 (PN# DIDD30)
Includes Pro Plus meter, 4-meter Quatro field cable with galvanic DO probe, pH/ORP combo, and conductivity, and soft-sided carrying case (DID405).
Quote
MULTIPARAMETER WATER QUALITY METER CABLES
Quatro 4 Port Multiparameter Water Quality Meter Cable, 3.3 ft (1 m) (PN# DID305)
Includes two ISE ports, a DO port, and built in conductivity/temperature sensor.
Quote
Quatro 4 Port Multiparameter Water Quality Meter Cable, 13.1 ft (4 m) (PN# DID310)
Includes two ISE ports, a DO port, and built in conductivity/temperature sensor.
Quote
Quatro 4 Port Multiparameter Water Quality Meter Cable, 32.8 ft (10 m) (PN# DID315)
Includes two ISE ports, a DO port, and built in conductivity/temperature sensor.
Quote
Quatro 4 Port Multiparameter Water Quality Meter Cable, 65.6 ft (20 m) (PN# DID320)
Includes two ISE ports, a DO port, and built in conductivity/temperature sensor.
Quote
Quatro 4 Port Multiparameter Water Quality Meter Cable, 98.4 ft (30 m) (PN# DID325)
Includes two ISE ports, a DO port, and built in conductivity/temperature sensor.
Quote
MULTIPARAMETER WATER QUALITY METER SENSORS
Galvanic DO Multiparameter Water Quality Meter Sensor (PN# DID350) Quote
Polarographic DO Multiparameter Water Quality Meter Sensor (PN# DID355) Quote
pH Multiparameter Water Quality Meter Sensor (PN# DID360)
Uses one ISE port in the Quatro 4 port cable assembly.
Quote
ORP Multiparameter Water Quality Meter Sensor (PN# DID365)
Uses one ISE port in the Quatro 4 port cable assembly.
Quote
pH/ORP Combination Multiparameter Water Quality Meter Sensor (PN# DID370)
Uses one ISE port in the Quatro 4 port cable assembly.
Quote
Ammonium Multiparameter Water Quality Meter Sensor (PN# DID375)
Uses one ISE port in the Quatro 4 port cable assembly.
Quote
Chloride Multiparameter Water Quality Meter Sensor (PN# DID380)
Uses one ISE port in the Quatro 4 port cable assembly.
Quote
Nitrate Multiparameter Water Quality Meter Sensor (PN# DID385)
Uses one ISE port in the Quatro 4 port cable assembly.
Quote
MULTIPARAMETER WATER QUALITY METER ACCESSORIES AND SPARE PARTS
Pro Plus Multiparameter Water Quality Meter (PN# DID300)
Includes Meter, Data Manager software, the ProComm II communications saddle, and USB cable.
Quote
Quatro Cable Flow Cell (PN# DID400) Quote
Multiparameter Water Quality Meter Carrying Case, Soft-Sided (PN# DID405) Quote
Multiparameter Water Quality Meter Carrying Case, Hard-Sided (PN# DID410) Quote
Multiparameter Water Quality Meter Belt Clip (PN# DID415) Quote
Multiparameter Water Quality Meter Mounting Tripod (PN# DID420) Quote
Multiparameter Water Quality Meter Shoulder Strap (PN# DID425) Quote
Multiparameter Water Quality Meter Cable Management Kit (PN# DID430) Quote
Multiparameter Water Quality Meter Cable Weight (PN# DID435)
24 oz., 3 inch sensor/cable weight
Quote
Multiparameter Water Quality Meter Cable Weight (PN# DID440)
51 oz., 6 inch sensor/cable weight
Quote
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