We are the exclusive UK and Ireland distributor for YSI Water Quality Systems for groundwater monitoring applications. YSI is a global business committed to sustaining the quality and viability of the world's water resources with accurate and reliable water quality testing equipment. Their meters have proved to be rugged, reliable, accurate and durable. We include a range in our rental fleet – testament to their true fieldwork credentials.
Please note that BS ISO 11271 requires that all Redox measurements are required to be translated as if they were taken with a SHE electrode (Standard Hydrogen Electrode). A conversion table and a more detailed explanation can be found on our 'Redox Conversion Table', Information Sheet.
Designed for demanding field work the ProDSS is the latest, smartest, most innovative portable water quality multi-parameter instrument from the YSI stable. The ProDSS measures water parameters like dissolved oxygen (optical), pH, ORP, conductivity, specific conductance, salinity, TDS, resistivity, TSS, ammonium, ammonia, chloride, nitrate, depth, temperature and, most importantly turbidity.
YSI has taken the advanced technology from the EXO series to make the new ProDSS the best handheld available. This instrument is rugged and reliable with intelligent, user-replaceable digital sensors that can be connected to any port and that are automatically recognised by the instrument and retain the calibration data.
With optional GPS and depth the ProDSS is completely customisable* and with military specification connectors, IP67 waterproof, rubber over-moulded case and 1-metre drop tests, durability is ensured for longevity of sampling even in the harshest field conditions.
*Rental instruments will be configured/calibrated to measure temperature/conductivity, DO, pH, ORP and turbidity.
The ProDSS is smart, cost-effective and adaptable for the future. Its high-impact body is built to record water quality to depths of 250 meters. The data is stored on-board the instrument for downloading to a laptop on completion of the monitoring sequence.
|YSI ProDSS Specifications|
|Size||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.)|
|Weight with batteries||567 grams (1.25 lbs)|
|Power||Rechargeable lithium-ion battery pack providing ~48 hours of battery life (instrument only with backlight off)|
|Instrument operating temperature||0 to 50 °C (32 to 122 °F)|
|Instrument storage temperature||0 to 45 °C (32 to 113 °F) with battery installed; 0 to 60 °C (32 to 140 °F) without battery installed|
|Display||Colour, LCD graphic display|
|USB port||Built-in micro USB On-The-Go port for PC connection, recharging/powering the ProDSS & connecting directly to a USB stick|
|Cables||Available with or without depth sensor in 1, 4, 10, 20, 30, 40, 50, 60, 70, 80, 90, and 100-meters|
|Sensor ports||4 universal sensor ports on each cable; can accept any ProDSS sensor|
|Warranty||3-year instrument; 2-year bulkhead, cable assembly, and sensors; 1-year pH and pH/ORP sensor modules, ODO sensor caps & Li-ion battery pack; 6-months ammonium, nitrate & chloride sensor modules|
|Memory||> 100000 data sets|
|Logging modes||Single point or continuous with auto-stable feature|
|GLP compliance||Yes; 400 detailed GLP records can be stored & are available to view, download & print.|
|Languages||English, Spanish, Portuguese, French, German, Italian, Japanese, Norwegian, Simplified Chinese, Traditional Chinese|
|Certifications||CE; RoHS; IP-67; WEEE; FCC; UN Part III, Section 38.3, Test methods for lithium-ion batteries (Class 9)|
|GPS||Optional internal GPS; coordinates are stored with measurement data & site lists|
|Sites & Data ID||100 user-defined sites and 100 user-defined data ID tags|
|Instrument, Sensor & Cable|
|Temperature||-5 to 70 °C (temperature compensation range||for DO mg/L measurement: -5 to 50 °C ) ±0.2 °C||0.1 °C or 0.1 °F (user selectable)||°C, °F, K|
|pH||0 to 14 pH units||±0.2 pH units||0.01 pH units||pH, pH mV|
|ORP||-1999 to 1999 mV||±20 mV||0.1 mV||mV|
|Dissolved Oxygen||0 to 500%, 0 to 50 mg/L||0 to 200%: ±1% of reading or 1% saturation, whichever is greater
200 to 500%: ±8% of reading
0 to 20 mg/L: ±0.1 mg/L or 1% of reading, whichever is greater
20 to 50 mg/L: ±8% of reading
|0.01 mg/L and 0.1%, or 0.1 mg/L and 1% (user selectable)||% saturation, % saturationlocal, mg/L, ppm|
|Barometer||375 to 825 mmHg||±1.5 mmHg from 0 to 50 °C||0.1 mmHg||mmHg, inHg, bar, psi, kPa, atm|
|Conductivity**||0 to 200 mS/cm||0 - 100 mS/cm: ±0.5% of reading or .001 mS/cm, whichever is greater 100 - 200 mS/cm: ±1.0% of reading||0.001, 0.01 or 0.1 μS/cm (range dependent)||μS/cm, mS/cm|
|Specific Conductance*||0 to 200 mS/cm||0 - 100 mS/cm: ±0.5% of reading or .001 mS/cm, whichever is greater 100 - 200 mS/cm: ±1.0% of reading. User selectable reference temp. (15 to 25 °C; default 25°C) & compensation coefficient (0 to 4%/°C; default 1.91%)||0.001, 0.01, 0.1 mS/cm||μS/cm or mS/cm|
|Salinity*||0 to 70 ppt||±1.0% of reading or ±0.1 ppt, whichever is greater||0.01 ppt||ppt or PSU|
|Total Dissolved Solids*||0 to 100 g/L||Calculated from specific conductance and a user-selectable TDS multiplier (0.30 to 1.00; default 0.65)||0.001, 0.01, 0.1 g/L||mg/L, g/L, kg/L|
|Seawater Density*||0.0 to 50.0 sigma, sigma T||-||0.1 sigma or sigma T||Sigma, Sigma T|
|Turbidity||0 to 4000 FNU||0 to 999 FNU: 0.3 FNU or ±2% of reading, whichever is greater||1000 to 4000 FNU: ±5% of reading||0.1 FNU FNU, NTU|
|Total Suspended Solids*||0 to 30000 mg/L||User correlated from turbidity field measurements & lab TSS measurements from grab samples||0.01, 0.1 mg/L||mg/L|
|Ammonium***/****||0 to 200 mg/L NH4 -N||±10% of reading or 2 mg/L, whichever is greater||0.01 mg/L||NH4 -N mg/L, NH4 -N mV|
|Chloride***||0 to 18000 mg/L Cl||±15% of reading or 5 mg/L, whichever is greater||0.01 mg/L||Cl mg/L, Cl mV|
|Nitrate***||0 to 200 mg/L NO3||-N ±10% of reading or 2 mg/L, whichever is greater||0.01 mg/L||NO3 -N mg/L, NO3 -N mV|
|Depth||0 to 328 feet (0 to 100 m)||±0.013 ft (±0.004 m) for 1, 4 & 10 m cables||±0.13 ft (±0.04 m) for cables 20 m & longer 0.001 m or 0.01 ft||M,ft|
*Derived/calculated parameter **Resistivity can be calculated with the conductivity sensor ***ISEs for freshwater only; 20 meter maximum depth ****Ammonia can be calculated and reported from ammonium, temperature, salinity, and p
|Instrument, Sensor & Cable|
|Temperature||Thermistor, installed on conductivity sensor||Not available||100 m||2 years for conductivity/temperature sensor|
|pH||Combination glass bulb electrode, Ag/AgCl reference electrode with gelled electrolyte||1, 2, or 3 point||100 m||2 years for pH & pH/ORP sensors
1 year for pH & pH/ORP sensor modules
|ORP||Platinum button with Ag/AgCl reference||1 point||100 m||2 years for pH/ORP sensor
1 year for pH/ORP sensor module
|Dissolved Oxygen||Optical luminescence - lifetime method||1 or 2 point||100 m||2 years for optical DO sensor
1 year for optical DO sensor cap
|Barometer||-||1 point||-||3 years, integrated into ProDSS handheld|
|Conductivity||Four nickel electrode cell||1 point||100 m||2 years for conductivity/temperature sensor|
|Specific Conductance*||Calculated from conductivity & temperature||-||-||1 point|
|Salinity*||Calculated from conductivity & temperature||1 point||-||-|
|Total Dissolved Solids (TDS)*||Calculated from specific conductance & a user selectable TDS multiplier (0.30 to 1.00; default 0.65)||-||-||-|
|Resistivity*||Calculated from conductivity & temperature||-||-||-|
|Seawater Density*||Sigma is calculated from salinity, temperature & pressure (depth) Sigma T is calculated from salinity & temperature||-||-||-|
|Turbidity||Nephelometric - Optical, 90° scatter||1, 2, or 3 point||-||2 years for turbidity sensor|
|Total Suspended Solids(TSS)*||User correlated from turbidity field measurements & lab TSS measurements from grab samples||-||-||-|
|Ammonium**||Ion selective electrode||1, 2, or 3 point||20 m||2 years for ammonium sensor
6 months for ammonium sensor module
|Ammonia*||Calculated from ammonium, temperature, salinity & pH||-||-||-|
|Chloride**||Ion selective electrode||1, 2, or 3 point||20 m||2 years for chloride sensor
6 months for chloride sensor module
|Nitrate**||Ion selective electrode||1, 2, or 3 point||20 m||2 years for nitrate sensor
6 months for nitrate sensor module
|Depth||Pressure transducer||1 point||-||2 years, integrated into cable assembly|
*Derived/calculated parameter **ISEs for freshwater only; 20 meter maximum depth
The YSI Professional Plus handheld multiparameter meter provides extreme flexibility for the measurement of a variety of combinations.
The new Quatro cable attached to the Pro Plus allows you to utilise 4-ports to measure temperature/conductivity, DO, and any two ISEs among pH, ORP, ammonium, chloride, or nitrate.
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 over moulded case, a 2-year cable warranty and one year probe warranty. In-house testing procedures also include 1-meter drop tests from all angles to ensure expected field-durability.
The YSI Pro 20 and ProODO series are water proof, rugged, reliable single parameter handheld meters available for the determination of Dissolved Oxygen. The Pro 20 features the YSI Professional Series Galvanic or Polarographic DO sensors whilst the Pro ODO has an Optical DO sensor.
They both include:
- 3-year instrument warranty and a 2-year cable and probe warranty (Pro 20 Probe has 1 year warranty)
- Military Spec (MS) connectors
- Rubber overmolded case
- Field tested cables
- Rugged, weighted probe guard
The YSI Pro2030 is a durable and easy to use handheld dissolved oxygen / conductivity meter that automatically compensates for changes in salinity values. Rugged, easy to use and reliable, this meter will also measure specific conductance, total dissolved solids (TDS), barometric pressure and temperature.
It also benefits from:
- MS (Military Spec) cable connector
- Choice of field DO sensors: Polarographic or Galvanic
- Rugged, weighted field cables available in lengths from 1 to 30 metres
- Being completely waterproof to 1 metre submersion
- 3-year instrument; 2-year cable; 1-year Polarographic/6-month Galvanic sensor warranty
- Storing 50 data sets to ensure data integrity.
The EXO Sonde from Xylem is a multiparameter water quality meter which can measure and log data. The EXO1 in the Van Walt rental stock will be configured to measure and log the following parameters simultaneously: pH, EC, Temperature, Redox, Dissolved Oxygen and Turbidity. When connected to the Storm 3 telemetry unit, additionally, it will also report water level.
The EXO Sondes are very special and the result of a US$ 24 million investment programme. The idea was to create the ultimate water quality measuring device and no shortcuts were taken. The EXO's have a host of features, viewable on the specification sheets but a few are worth focusing on:
The robust, multiparameter, 4-port EXO offers a wide range of capabilities for groundwater monitoring of:
The EXO is smart, cost-effective and adaptable for the future. Its high-impact body is built to record water quality to depths of 250 meters. The data is stored on-board the instrument for downloading to a laptop on completion of the monitoring sequence.
The EXO logger is also available with telemetry.
|Diameter||4.70 cm (1.85 in)|
|Length||64.77 cm (25.50 in)|
|Peripheral Ports||1 power communication port|
|Warranty, 1-Year||pH, ORP and optical DO membranes|
|Warranty, 2-Year||Cables, sonde bulkhead, handheld and the following sensors: conductivity, temperature, depth and optical sensors|
|Weight||1.42 kg (3.15 lbs)|
|General Sonde Specifications|
|Battery Life||90 days**|
|Communications||Computer Interface: Bluetooth wireless technology (between sonde and handheld or computer with KOR software), RS-485, USB;
Output Options: USB with signal output adapter (SOA); RS-232 & SDI-12 with DCP-SOA.
|Data Memory||512 MB total memory; >1,000,000 Logged readings|
|Depth Rating||0 to 250 m (0 to 820 ft)|
|Sample Rate||Up to 4 Hz|
|Temperature - Operating||-5 to +50°C|
|Temperature - Storage||-20 to +80°C|
|**Typically 90 days at 20˚C at 15-minute logging interval; temperature / conductivity, pH/ORP, DO, and turbidity sensors installed on EXO1; or temperature/conductivity, pH/ORP, DO, total algae, and turbidity sensors installed with central wiper that rotates once per logging interval on EXO2. Battery life is heavily dependent on sensor configuration. Specifications indicate typical performance and are subject to change. Xenoy is a trademark of SABIC Innovative Plastics IP BV. EXO Bluetooth modules comply with Part 15C of FCC Rules and have FCC, CE Mark and C-tick approval. Bluetooth-type approvals and regulations can be country specific. Check local laws and regulations to insure that the use of wireless products purchased from Xylem are in full compliance. EXO components are not compatible with YSI 6-Series sondes, sensors, or handheld.|
Designed for long term, continuous pH surface and groundwater monitoring in challenging and difficult to access locations where a large quantity of reliable data is required.
Delivers stable, accurate measurements.
Is usually supplied pre-programmed to start at a specified time and the data is retrieved by Van Walt and supplied in CSV format.
|WTW pH Data Logger|
|pH Range *||0.000 to 20.000|
|mV Range *||-1000.0 to +1000.0|
|Temperature Range *||23 to 221°F (-5.0 to +105.0°C)|
|mV Resolution||0.1 mV|
|Temperature Resolution||0.1°F (0.1°C)|
|pH Accuracy *||< 0.005 +1 Digit|
|mV Accuracy *||< 0.2mV +1 Digit|
|Temperature Accuracy *||< 0.1°F (0.1°C) +1 Digit|
|Temperature sensor||Automatic recognition of the temperature sensor of the electrode: NTC 30 (30 kΩ at 25 °C / 77 °F) or Pt1000|
|Calibration||Automatic buffer detection|
32 to 140 °F (0 to 60 °C)
2 to 12
|Data Volume||up to 600,000 data records|
|Sampling Interval||adjustable: 1,5,10,30 s/ 1,5,10,15,30 min/ 1,2,3,6,9,12,24 hr|
|Power Supply||Lithium ion battery (3.6V, AA size, 2600 mAh)|
|Battery Life||Up to 16 months depending on the sample rate|
|USB Interface||Type USB 1.1, USB-B (Device), data output|
|Protection Rating||IP 68|
|Maximum Pressure/Depth||145 PSI (10 bar)/328 ft (100 m)|
|Storage Temperature||-13 to 149°F (-25 to +65°C)|
|Material||Metal parts (Stainless steel 1.4571**), Battery Compartment (Brass, gold-plated)|
|Size of Probe||0.98 inch Diameter x 15.83 inch L (25 mm dia. x 402 mm long), retaining hole 0.26 inch (6.5mm)|
|Weight||1.9 lb. (860 g) including electrode|
|* The measuring ranges and accuracy exclusively refer to the measuring electronics of the pH datalogger without the electrode. For the measuring ranges and accuracy of the operable pH datalogger, the specifications of the electrode and buffer solutions have also to be taken into account. ** Stainless steel can be susceptible to corrosion at chloride concentrations of >500 mg/l.|
pH SensoLyt Electrode
|pH Range||2.000 to 12.000|
|Referenece Electrolyte||Polymer, AgCl free|
|Junction||Single hole junction|
|Temp Range||32 to 140°F (0 to 60°C)|
|Membrane Resistance at 25°C||< 500 MOhm|
|Maximum Pressure/Depth||145 PSI (10 bar)/328 ft (100 m)|
|Connection||SMEK head, 6-pole|
|Material||Shaft: Glass, O-rings: FPM (Viton), SMEK plug: PEEK with gold plated contacts|
|Dimensions||4.7 inch L x 1/2 inch Dia (120 mm L x 12 mm Dia)|
|Weight||1.6 oz (45 g)|