IMPress Sensors & Systems - PRODUCT NEWS
 

          


          





          Impress to showcase
          submersible pressure and level sensors at WWEM 2012

          
On stand 58
          at the Water, Wastewater & Environmental Monitoring (WWEM)
          exhibition 2012 from 7-8 November 2012 in Telford, instrumentation
          specialist Impress Sensors & Systems Ltd will be showcasing
          a number of submersible pressure, temperature and level transmitters,
          as well as a range of process controllers.

          
The main focus
          of the stand will be how these sensors can communicate with process
          controllers, data loggers and telemetry stations, allowing easier
          integration with existing process control networks and fieldbuses.
          Controllers and their integral software programs provide users
          with archiving, printing and visualisation tools, as well as
          a variety of visual presentation display options for recorded
          measurements. Impress will also demonstrate how to set up PID
          profiles, timers, relays and triggers using these controllers.
          Using JAVA applets, which can be embedded into any website or
          HTML-based web page, users can remotely access real time data
          from the controller via an Ethernet interface and web browser.

          
Submersible
          dual output sensors

          Also on the stand will be a number of submersible pressure, temperature
          and level sensors. The IMCTL (ceramic) and IMSTL (silicon) ranges
          of submersible dual output level and temperature transmitters,
          for example, are suitable for continuous submersion in water.
          These sensors provide dual independent, 2-wire, 4-20mA outputs:
          one for level and one for temperature. The sensors offer nominal
          pressure ranges from 10mWG to 100mWG (ceramic) and 0.5mWG to
          100mWG (silicon).

          
The higher accuracy
          IMSTL version uses the latest piezoresistive media-isolated silicon
          sensing technology and a stainless steel diaphragm. This provides
          excellent stability, repeatability and resolution, particularly
          for high accuracy level and temperature measurement (including
          V-notch weir flow measurements) in rivers, canals, reservoirs,
          boreholes and aquifers.

          
The IMCTL uses
          a ceramic sensor for level measurements, which provides excellent
          corrosion resistance, particularly in aggressive media. Applications
          include level and temperature measurements in tanks, rivers,
          boreholes and aquifers, as well as environmental monitoring in
          estuaries and seawater applications (when used with the marine
          bronze housing).

          
Manufactured
          in the UK, the IMCL (ceramic) and IMSL (silicon) series of submersible
          level transmitters are also available with a digital RS485 interface
          and Modbus RTU output. Every transmitter is temperature-compensated
          and calibrated. The electronics incorporate a microprocessor-based
          amplifier, with level measurements made possible by RS485 Modbus
          RTU serial communication. Impress provides a standard software
          package, which enables the user to re-range, calibrate and adjust
          some parameters of the device. There is also a facility to data
          log via the software, which is useful for checking installation
          and behaviours of the application. Nominal pressures are from
          0.5bar up to 700bar.

          
SDI-12 transmitters

          Also on stand 58 will be the S12 range of submersible hydrostatic
          level transmitters, which offers an SDI-12 digital output with
          an inbuilt high accuracy temperature sensor, which can be used
          in depths of up to 200m. This unit uses either a stainless steel
          silicon-based pressure sensor or a ceramic pressure sensor in
          marine-bronze. Both versions use piezoresistive technology, ensuring
          long-term stability and repeatability of measurements.

          
The stainless
          steel version offers a higher resolution of pressure measurement
          to around 12-13 Bit and has a much lower signal-to-noise ratio,
          providing a very smooth and accurate method of level measurement.

          
The S12 is suitable
          for monitoring river and reservoir levels; tanks and vessels
          in process plants; seawater and estuary levels; borehole water
          levels; Tsunami and tidal monitoring systems; wave height measurement;
          environmental monitoring; and V-notch weir flow measurement.

          
Tank gauging
          level transmitters

          Visitors to stand 58 will also be able to see Impress' new IMTG
          series of submersible tank gauging level transmitters. This piezoresistive
          silicon pressure sensor is designed for continuous submersion
          in water, particularly in small (0 to 10m depth) water tanks
          or containers, where the use of conventional mechanical level
          switches is not ideal and more level 'control' and measurement
          is required. Typical applications include the measurement of
          static tank levels, container or chamber levels and vehicle tank
          levels. A WRAS-approved version of the IMTG is also available
          for drinking water applications.

          
Multi-channel
          controllers

          As well as submersible pressure and level transmitters, Impress'
          stand will also feature a full working demonstration of the company's
          compact, multi-channel, touch-screen range of controllers, including
          the CMC-99 and CMC-141. These controllers are ideal for the simultaneous
          measurement and control of a variety of water and wastewater
          applications, including intermediate pumping station measurement
          and control.

          
Both controllers
          have an auxiliary 24V DC/200mA supply output on the back, which
          enables external sensors and actuators to be connected and powered
          by the controller. The controllers can also act as PID process
          controllers, providing a reliable control loop feedback mechanism
          for a variety of water temperature and level control applications.

          

          
October 2012

          

            

              
                
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