Wastewater Instruments

By providing advanced instrumentation for multiple sensor networks, parameters can be measured throughout an entire process such as a wastewater treatment plant with one system. Xylem provides solutions for online monitoring of a wide range of parameters in water, wastewater, environmental, food and beverage and process applications. We provide a wide array of products and systems for online monitoring in the analytics market including digital and scalable sensor monitoring systems to network multiple sensors for any size of application.

  • Online Monitors
  • Online Sensors & Analysers
  • Portable Meters
  • Laboratory
  • Auto Samplers

WTW IQ SensorNet 181

    Our latest instrument, the WTW 281 has superseded this product.  Click here for the latest information


    WTW IQ SensorNet 182

      Our latest instrument, the WTW 282 has superseded this product.  Click here for the latest information


      WTW IQ SensorNet 282

      Controller for small and mid-sized wastewater treatment plants including USB-interface and internal data logger – up to 4 sensors, all parameters, available anytime.

      2020 3G family

      WTW IQ SensorNet 2020 3G Controller

      With an easily scalable solution, the 2020 3G allows for the connection of up to 20 sensors. This modular plug-and-play system allows you to monitor the water quality in your wastewater system continuously and accurately.

      WTW IQ SensorNet Controller 281

      WTW IQ SensorNet 281

      Single sensor digital controller for small and mid-sized wastewater treatment plants wishing to measure pH, Dissolved Oxygen, Conductivity or Turbidty, including USB-interface and internal data logger.

      WTW CarboVis Spectral Sensors

      WTW CarboVis Spectral Sensors

      The chemical-free spectral measurement allows a precise determination of the COD and nitrate level.


      WTW FDO Online Dissolved Oxygen Sensor

      Optical and electro-chemical sensors for the measurement of dissolved oxygen with analog monitors or the modular and flexible IQ Sensor Net

      UV 700 IQ SAC

      WTW UV 700 IQ SAC

      The SAC sensor measures Spectral Absorption Coefficient (SAC) and UV transmission (UVT) at 254nm for determination of organic loads in water. With the  sensor UV 700 IQ SAC this parameter can be detected directly without any chemicals. A reference measurement is performed for compensation of turbidity influences.

      WTW VisoTurb®

      WTW VisoTurb® 700 IQ & ViSolid® 700 IQ Sensors

      With the VisoTurb® 700 IQ and ViSolid® 700 IQ sensors, WTW presents a family of optical sensors for turbidity and suspended solids measurement. These sensors incorporate a ultrasound cleaning system that guarantees low maintenance and long-term reliability of the sensors. Turbidity measurements in aqueous media with VisoTurb® are carried out nephelometrically in compliance with EN ISO 7027. Solid matter measurement with ViSolid® is performed according to the principle of scattered light measurement.

      SensoLyt® pH/ORP sensors

      WTW SensoLyt® pH / ORP Sensors

      For continuous pH/ORP measurement, especially under the difficult conditions very often found in sewage treatment facilities, very high demands are made concerning the reliability and operating safety of the systems employed.


      WTW P700 Orthophosphate Analyser

      Our latest instrument, the WTW Alyza for Orthophosphate has superseded this product.  Click here for the latest information

      WTW Varion sensor

      WTW VARiON Plus 700 IQ

      The VARiON probe is used within the IQ SensorNet system and can therefore be networked with other probes and parameters for a complete process monitoring and control system. It can measure, report and control off of the ammonium and/or nitrate measurements with automatic compensation for potassium (for ammonium) or chloride (for nitrate).


      WTW 700 IQ IFL Sensor

      The IFL is an ultrasonic, interface level measurement sensor for the IQ SensorNet system. During the wastewater treatment process, the measurement of the interface level between liquids is of vital importance for optimal performance and trouble-free operation. The 700 IQ IFL provides continuous data to help operational efficiency improvement decisions. Simply connect it to the IQ SensorNet system.

      tetra con

      IQ SensorNet TetraCon® Sensors

      Submersible Conductivity probe for IQ System, requires cable assembly.

      WTW Alyza IQ PO4

      WTW Alyza IQ PO4 Analyzer for Orthophosphate

      Maximise data and minimise maintenance and reagent consumption with the Alyza IQ.  With reagent consumption of less than 1ml per day, WTW’s Alyza IQ will help you minimise your costs whilst protecting the environment.  Part of the IQ SENSORNET family.


      Global Water - SLDG Sludge Judge®

      The SLDG Sludge Judge® sampler is designed to take accurate readings of settled solids that are 5% or less in
      a variety of liquids at any depth.

      WTW MultiLine® IDS

      WTW MultiLine® IDS

      The new multi-parameter systems with intelligent, digital sensors for pH, dissolved oxygen (DO) and conductivity measurement revolutionize multi-parameter measurement:
      The signal processing is completely located in the sensor, and the measuring signal is transmitted to the meter without interference and in a clearly identifiable manner via thin, highstrength cables. A wide range of sensors are available for virtually every application.


      WTW Portable colorimeter pHotoFlex® STD

      The portable pHotoFlex® STD with energy-efficient LED optics is equipped with 6 wavelengths and a foldable adapter for various applications with 16 mm and 28 mm cuvettes, for even the smallest concentrations.


      Royce Portable Suspended Solids Unit

      • Two complete analysers in one package (TSS & Interface Level)
      • Automatic ranging
      • Simple, insitu calibration
      • Electronic self-diagnostics
      • Waterproof, rugged housing

      Alt: WTW photoLab® 7600 UV-VIS

      WTW photoLab® 7000 Series Spectrophotometer

      The photoLab® 7000 series of spectrophotometers combine latest optical technology with digital processing to provide users with an efficient and effective means of gathering spectrophotometric data in chemical, pharmaceutical, food, beverage and especially environmental applications.   Special software features include up to 200 industry standard scales/methods and the unique OptRF feature for determining nitrate and nitrate without the need for reagents. Additionally, photoLab Data software expands its capability by displaying results in industry standard color scales including CIE, EBC, ASTM, ICUMSA and so on.


      WTW BOD self check measurement OxiTop®

      OxiTop® systems for BOD or other depletion / respiration applications

      • Complete packages ready to use
      • Simple, flexible, secure, compliant, customisable and scalable
      • Mercury-free pressure measurement

      WTW 9310

      WTW inoLab® IDS - Benchtop

      Connect digital IDS sensors to the Inolab for the measurement of pH, ORP, conductivity, and DO/BOD.

      • Uncompromised measuring accuracy
      • Digital sensor recognition
      • Smart sensor evaluation

      WTW Inolab pH/Ion 7320

      WTW InoLab® pH/Ion 7320

      Precise pH/ISE benchtop meter with enhanced ISE methods for concentration measurement with ion selective electrodes

      • Simultaneous measurements of pH, ion concentration or ORP
      • Flexible and convenient data transfer
      • Visualization of the optimum measuring range supports correct measurements (CMC function)

      YSI ProOBOD Optical BOD Probe

      YSI ProOBOD Optical BOD Probe

      The ProOBOD® self-stirring optical BOD probes are designed to fit into standard 300 mL BOD bottles with an international version also available for use with other tapers.

      910 COD Colorimeter

      YSI 910 COD Colorimeter

      The YSI 910 COD colorimeter is ideal for any application. This portable instrument allows you to easily take readings for COD.


      Global Water - SLDG Sludge Judge®

      The SLDG Sludge Judge® sampler is designed to take accurate readings of settled solids that are 5% or less in
      a variety of liquids at any depth.


      YSI ProSample Autosampler

      The YSI ProSample series of fully automated portable samplers expand our process monitoring and control equipment offering. These lightweight and easy to use samplers come with a proprietary peristaltic pump for highly accurate sampling based on time, flow, or event. The ProSample series has extremely high volume accuracy to keep your facility in compliance.  The ProSample series is most commonly used in stormwater and storm event sampling, influent and effluent wastewater treatment, collection systems for industrial pre-treatment and any time based sampling requirements. The ProSample series provides a unique combination of design and technology.