Turbidity, or cloudiness, has often been considered a superb first line indicator of water quality. Turbidity may be caused by growth of phytoplankton. Human activities that disturb land, such as construction, mining and agriculture, can lead to high sediment levels entering water bodies.. Erosion rates contribute large amounts of turbidity to nearby waters, and industries such as quarrying, mining and coal recovery can generate very high levels of turbidity from colloidal rock particles. High turbidity levels can reduce the amount of light reaching lower depths, which can inhibit growth of submerged aquatic plants, reducing oxygen levels. In drinking water, the higher the turbidity level, the higher the risk that people may develop gastrointestinal diseases. Suspended solids interfere with water disinfection with chlorine because the particles act as shields for the virus and bacteria. Similarly, suspended solids can protect bacteria from UV sterilisation of water. The HTTURB IR turbidity meter offers fast, precise on-site testing using the industry standard nephelometric method (scattered light at an angle of 90°). The wide range makes this a multi-purpose instrument for a variety of possible applications and the IR light source ensures suitability for both coloured and colourless liquids. The unit comes complete with calibration standards and accessories, packaged in a hard shell carry case.

The HydroTest COD System HTCOD is designed for the determination of chemical oxygen demand index (COD) using the small-scale sealed-tube method. The industry standard dichromate method can be considered as an estimate of theoretical oxygen demand. With a wide measuring range from 0 – 15,000 mg/L O2, the HTCOD is ideal for waste water testing, offering a small handheld photometer with two LED light sources housed inside a waterproof sample chamber. The highly-sensitive equipment is compatible with mercury-free tube tests, with optional chloride compensation to remove interference, and utilises the popular photometric determination method. Standard solutions can be used to verify operation and accuracy of the instrument. The thermoreactor is compatible with other products in the HydroTest range, and can also be utilised for tube test digestion of TOC, total Chromium total Nitrogen and total Phosphate. The thermoreactor operates at three pre-set temperatures, with three pre-set reaction times, and offers automatic switch-off functionality with audible alarm.

A highly accurate pocket pH meter, offering 1 to 3 points calibration functionality with auto-buffer recognition for USA and NIST standards. Automatic temperature compensation provides accurate readings across the entire measurement range. The round glass bulb electrode is perfectly suited for measuring the pH of liquids. Equipped with a high-clarity LCD display, the HL101 is designed for maximum ease of use, with auto-hold functionality to freeze a stable reading for ease of recording. A visible battery indicator and auto-off functions effectively conserve and communicate battery life to the user. A fully replaceable electrode module reduces maintenance costs.

A powerful multi-parameter pocket conductivity meter, including TDS and salinity measurement modes. The platinum-based electrode module offers fast, reliable results and is fully replaceable for reduced maintenance costs. The TDS conversion factor is adjustable to suit a plethora of different measurement requirements. The meter offers 1 to 3 points calibration functionality with automatic calibration solution recognition. Automatic temperature compensation provides accurate readings across the entire measurement range. The HL102 is designed for ease of use, with auto-hold functionality to freeze a stable reading for ease of recording. A visible battery indicator and auto-off functions effectively conserve and communicate battery life to the user.for 200 tests.

A simple pocket dissolved oxygen meter using an industry-standard polarographic DO probe, offering 1 or 2 point calibration using air-saturated water or zero oxygen solution. Automatic temperature compensation, and manual salinity and barometric pressure compensation improve accuracy across the entire measurement range. The HL103 is designed for ease of use, with auto-hold functionality to freeze a stable reading for ease of recording. A visible battery indicator and auto-off functions effectively conserve and communicate battery life to the user. A fully replaceable electrode module reduces maintenance costs.