Surface Water Quality Measurement and Logging Suppliers of Solinst, YSI, Hanna Details
Solinst 3001 LTC Junior
The LTC (Level/Temperature/Conductivity) is similar to the Levelogger Junior in that it combines a pressure transducer and temperature sensor in a stainless steel housing, but it also incorporates a conductivity sensor. The sensor is a 4-electrode platinum sensor with auto ranging capabilities and is easy to calibrate.
YSI 556 Multiparameter Water Quality Meter
The 556 is a handheld field water quality meter which simultaneously measures pH, temperature, conductivity, dissolved oxygen and oxidation/reduction potential (ORP). There is a choice of 4, 10 and 20 m cable lengths for down-hole analysis and profiling. Options include an internal barometer for accurate dissolved oxygen calibration (with field replaceable membranes), a flow cell for use in groundwater sampling. ORP, pH, or combined pH/ORP sensors are also available, and all sensors are completely submersible. The PDA is completely protected against dust and against immersion up to 1 m (IP-67 rated). The operational lifetime is 180 hours with standard alkaline batteries.

YSI Professional Plus
The Professional Plus is a hand held field water quality meter providing increased flexibility over base models on available parameters. The Professional plus can have combinations involving temperature, pH, conductivity, dissolved oxygen, ORP, pH/ORP combination, ammonium (ammonia), nitrate and chloride. Cable options range from 1-, 4-, 10-, 20-, and 30-meter choices (up to 100-meters on DO only cables). The Professional Plus can also be used as a lab BOD instrument utilizing a self-stirring BOD probe.
YSI Pro 20
The Pro20 is a hand held dissolved oxygen meter which can be used as for DO in the field or for BOD in the lab. Both polarographic and galvanic DO sensors are available for the field and a BOD sensor for the lab. Polarographic DO sensors have a longer life expectancy and reduce overall costs, while galvanic sensors have no warm-up time and can be used immediately after the instrument is turned on. The unit features an internal barometer, and 1-, 4-, 10-, 20-, 30- or 100 m cables are available.
YSI ProODO
The ProODO is a handheld DO meter that utilizes an optical, luminescent based dissolved oxygen sensor as opposed to the more common electrochemical sensors. In the case of optical DO sensors there is no membrane and so no membrane fouling can occur, and the dissolved oxygen is not chemically consumed, unlike an electrochemical sensor. 1-, 4-, 10-, 20-, 30- or 100 m Cable options are available, including a cable management kit on cable lengths greater than 4 m. The accessible DO range is 0-500% (0-50 mg/L).
Hanna Instruments 9828 Multiparameter Water Quality Meter
The HI 9828 is a multiparameter portable meter with GPS receiver monitoring up to 13 different water quality parameters (6 measured, 7 calculated). Measurements from specific locations are tracked with detailed coordinate information that can be viewed immediately on the display. GPS information can even be viewed by Google™ maps™ and clicking on visited locations in Google™ Maps displays measurement information. The HI 9828 has a graphic, backlit display that incorporates comprehensive GLP features and the downloading of data via USB connection. Designed for outdoor environments, the meter is impact resistant and waterproof meeting IP67 standards (30 minutes immersion under 1 m of water, completely dust resistant). The multi sensor probe can be left underwater (IP68 standard).
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