Click here to enlarge imageWith an advanced fluorescence quenching (FQ) sensing element, the Triton DO8 dissolved oxygen sensor delivers exceptionally accurate DO measurement with greatly reduced maintenance requirements for a low cost of ownership over a long service life in a wide range of municipal and industrial applications. Ideal for drinking water, wastewater, surface water monitoring, aquaculture, etc., the trouble–free sensor is designed with precision FQ optical technology coupled with intelligent microprocessor–based electronics. The self–monitoring unit stores calibration data within the sensor, which minimizes maintenance over long service intervals while providing stable, dependable DO measurement. It features a maximum error rate of less than 2%, repeatability of ±0.5% and resolution of 0.01 ppm or 0.01% saturation, operating over a wide measurement range with three different outputs from 0 to 20 mg/L (0–20 ppm), 0–200% saturation or 0–500 hPa (0–6 psi). It’s designed to take measurements at temperatures from –5 to 50°C (20–120°F) and withstand pressures up to 10 bar (145 psi). Electro–Chemical Devices Inc., Yorba Linda, California, USA, www.ecdi.com.
Enquiry No. 38
Flow measurement, control
Badger Meter Europa GmbH presents “Flow Metering, Controlling, Batching, Monitoring and Recording,” a new technical book for all users of state–of–the–art flow measurement & control technology. Authors, Horst Gras and Heinz G. Erb, bring over 35 years experience to complex issues of flow metering and controlling of liquids and gases, explained in detail over 320 pages. A practical and relevant reference book, the choice for the right metering technology is determined for the application and required accuracy class. It presents important criteria to all users in a clearly laid–out format and content, and shows fundamental, theoretical differences of measuring principles with advantages and disadvantages. It deliberately avoided long, scientific derivations and details to provide the users with practical support and important facts to help them choose the best suited flow meter or control valve. Badger Meter Europa GmbH, Neuffen, Germany, www.badgermeter.de.
Enquiry No. 40
Water system security
Integrated alarm systems and management solutions specialist Drax (UK) Ltd. has launched SiteWatch, a new GSM–based system designed for simple, economical offsite monitoring 24 hours a day. It consists of single or multiple remote transmitter units positioned adjacent to equipment to be monitored, a central receiver unit and a PC equipped with management software, typically at the facilities manager’s office or service organisation. Remote units (up to 255) are hardwired to the monitored equipment’s outputs and read signals generated, such as on, off, fire, fault, open, closed, etc. Signals are encoded and a customised data message sent via SMS to the SiteWatch Manager. Activation of these inputs can be pre–programmed to send tailored messages via email or text message, such as ‘immediate action’, ‘advise client’, ‘schedule for next maintenance visit’, allowing for the relevant response. Drax (UK) Ltd., Letchworth, Hertfordshire, UK, www.draxuk.com.
Enquiry No. 39
Reducing water losses