YSI ProQuatro handheld multi parameter instrument can measure dissolved oxygen, conductivity, specific conductivity, salinity, resistivity, total dissolved solids (TDS), pH, ORP, pH/ORP combination, ammonium (ammonia), nitrate, chloride and temperature in various combinations. It is also a very powerful laboratory instrument for BOD, pH, and ORP.
EPA approvalReport on meeting the standards for drinking water and wastewater.
YSI ProQuatro Portable Multi Parameter Water QualityanalysisTechnical parameters of the instrument (4-meter cable+probe):
parameter |
measuring principle |
measuring range |
resolution |
accuracy |
calibration |
Working Depth |
|
dissolved oxygen |
%Air saturation |
Polarographic method or primary battery method |
0-500% |
0.1% or 1% air saturation (Optional) |
0-200%: ± 2% of the reading or 2% air saturation, Whichever is larger; 200-500%: ± 6% of reading |
1 point or two-point calibration with 0% |
|
Milligrams per liter |
0-50mg/L |
0.1 or 0.01mg/L (Optional) |
0-20mg/L: ± 2% of the reading or 0.2mg/L, Whichever is larger; 20-50mg/L: ± 6% of reading |
1 point or two-point calibration with 0% |
|
||
temperature |
Field durable cable |
|
-5 to 70 ℃ |
0.1 |
±0.2℃ |
|
4m |
Laboratory grade cables |
|
5 to 70 ℃ |
0.1 |
±0.35℃ |
|
||
Conductivity* |
Four electrode flow type Conductivity measurement tube method |
0-200mS/cm |
0.001-0.1mS/cm (Depending on the range) |
± 0.5% of the reading or 0.001mS/cm, Whichever is larger (4m cable); ± 1% of the reading or 0.1 ppt, Whichever is larger (20m cable) |
one o'clock |
|
|
salinity |
Calculated from conductivity and temperature |
0-70ppt |
0.01ppt |
± 1% of the reading or 0.1 ppt, Whichever is larger, 0.2 |
one o'clock |
|
|
pH |
Glass composite electrode method |
0-14 |
0.01 |
±0.2 |
1, 2, 3, 4, 5 or 6 o'clock (Optional) |
|
|
ORP |
Platinum electrode method |
-1999 to 1999mV |
0.1mV |
±0.2mV |
one o'clock |
|
|
ammonium nitrogen |
Ion selective electrode method |
0-200mg/L-N (0-40) |
0.1mg/L-N |
± 10% of the reading or 2mg/L-N, Whichever is larger |
1, 2 or 3 o'clock (Optional) |
17m |
|
Nitrate nitrogen** |
Ion selective electrode method |
0-200mg/L-N (0-40) |
0.1mg/L-N |
± 10% of the reading or 2mg/L-N, Whichever is larger |
1, 2 or 3 o'clock (Optional) |
17m |
|
Chloride** |
Ion selective electrode method |
0-1000mg/L (0-40) |
0.1mg/L |
± 15% of the reading or 5mg/L, Whichever is larger |
1, 2 or 3 o'clock (Optional) |
17m |
|
total dissolved solids |
Calculated from conductivity and temperature |
0-100g/L (Can input 0.30 to 1.00, default value is 0.64) |
0.001, 0.01, 0.1 g/L |
0.4kPa (Temperature changes within ± 15 ℃ of calibration point) |
|
|
|
air pressure |
Piezoresistive method |
50-110kPa |
0.01kPa |
|
one o'clock |
|
|
Note: *The parameters calculated from this include resistivity, salinity, specific conductivity, and total dissolved solids **Ionic electrodes are only suitable for freshwater ***Additionally: US, NIST, or custom buffer solutions |
Host technical specifications:
parameter |
measuring range |
resolution |
accuracy |
PH value |
-2.60 to 16.60 |
0.1mV (0.01pH unit) |
± 0.1mV (± 0.01pH unit) |
Oxidation-reduction potential |
-1999 to+1999mV |
0.01mV |
±0.5mV |
conductivity |
0.0-200 mS/cm |
0.001mS/cm or 0.1 μ S/cm-0.1mS/cm (depending on the range) |
± 0.3% ± 1 digit of the full range |
dissolved oxygen |
0.00-90mg/L 0-550% |
0.01mg/L,0.1% |
± 0.2% of full range (550% air saturation) Previous position (at 10 o'clock, using 1.25PE cover film) |
temperature |
-10 to 100 |
0.1℃ |
Full range ± 0.1% 1-digit |
Configuration List:
YSI ProQuatro Portable Multi Parameter Water Qualityanalysisinstrument
ProQuatro Multi Parameter Water Quality Analyzerhost
4-meter cable, four probe interface -4
Dissolved oxygen electrodeYSI2003
pH electrodeYSI1001
ORP electrodeYSI1002
Conductivity electrodeYSI5560
Ammonia ion selective electrodeYSI1004
Chloride electrodeYSIYSI1005
Nitrate electrodeYSI1006
Membrane kitYSI5908
PH buffer solutionYSI3821,YSI3822,YSI3823
Conductivity calibration solutionYSI3167,YSI3168,YSI3169
redoxORP standard solutionYSI3682,YSI3683,YSI3684
Application areas:
Surface water and underground drinking water measurement
Measurement of agricultural water quality parameters
Non point source pollution in inland and coastal areas
Overflow from sewage treatment plants
Groundwater near sewage treatment plants that may be contaminated
Overflow caused by rainstorm
Water for entertainment projects
Surface Water Engineering
Wetland monitoring
Research on Salt Tide Invasion
Laboratory BOD testing
The food and beverage industry, mainly consisting of wine and beer
Comparison of data as a long-term unmanned monitoring device
University research project