RSM for CSO & SSO

RSM® – Remote Sewer Monitor

Sewer / Stormwater Overflow Monitoring and Alarm System

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Every water authority has experienced the issue of a sewer overflow at some stage. Spills can now be prevented and blockages detected early with the sewer overflow monitoring and alarm device called RSM®. How does it work? By installing RSM® in sewer or stormwater manholes, high sewer and stormwater levels can be detected as the level rises. An alarm is then automatically activated which identifies the manhole either through the Supervisory Control and Acquisition Data (SCADA) system or direct to a mobile phone or email address. Field maintenance can then be dispatched to rectify the situation before a spill occurs. With a 10 year battery life and the ability to configure the unit from your desktop, RSM® is low voltage and completely sealed, so not only do you have peace of mind that your network is being monitored, but the device is certified Intrinsically Safe (IS).

RSM® Features

  • Ultra low-power with 10 yr. battery
  • Certified Intrinsically Safe (IS)
  • Proven on three continents in critical applications (USA, Australia & Asia)
  • Alarms via Text (SMS) Message and your own website in real time.
  • Actually predicts overflows.
  • The alarm can be escalated if not confirmed within limits set by user.
  • Configuration downloaded to the customer site via FTP.
  • Text (SMS) alarm notification and email management for cell phone access by registered users.
  • Alert your team to action before SSO event.
  • Licensed Google Maps access for extensive geospatial information.

RSM®Avoids Hassles and Expense 

  • No special sewer lids
  • No local AC/DC required
  • No risk of explosion
  • No phone lines or radios to install
  • No antennas that snag on debris, your tools and sewer personnel
  • No special training classes or certification of any kind
  • No confined space training, certification and expense required to install
  • No weirs or flumes to install in sewer
  • No data-loggers that require on-site downloading or sync’ing
  • No programming or special computer software required

RSM® helps to insure against Sanitary Sewer Overflow (SSO) events and allows Sewer Managers to respond. RSM® is so fast acting that the contact closure could operate Bascule gates downstream to prevent disaster. In Kuala Lumpur, Malaysia, RSM® was used to control the flood gates for the Smart Tunnel – a 43.3 Ft  (13.2 Meter) diameter tunnel that is used for both auto traffic and as a tunnel for flood water in storm events. In Queens, New York City, RSM is currently being used to predict Storm Surge and unusual tidal events like Hurricane Sandy. In Singapore a network of 950 RSM® devices were installed. Each device provides early warning of possible sewer overflow conditions throughout the country. RSM® can do this for your district.

Specifications

Floats 

  • Cables/Floats…………………………3
  • Cable Lengths…………………………6.5’, 26.25’ & 32.8’ (2M, 8M & 10M)

Main Unit

  • Logging…………………………………2 Million Records
  • Clock…………………………………….Real Time with time and date stamp
  • Battery Life……………………………10 Years with one alarm per day
  • Dimensions……………………………4.9”Ø x 11.4 L”
  • Weight………………………………….8 lb (3.6 Kg)
  • Temperature…………………………-4° to 167°F (-20° to 75° C)
  • Temp. (GSM funct.)…………………-4° to 131°F (-20° to 55° C)
  • Environmental Rating………………IP68
  • Safety Ratings…………………………Intrinsically Safe
  • Quality………………………………….ISO9001:2000 (QEC Lic.5948)

Overview of Installation, Alarm States, Floats and Cable Lengths

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The main unit is installed on the side wall within the manhole, as close to the surface of the entrance, without interfering with manhole access and closing of the manhole cover. The float switches must not be positioned within the pipe flow, or improper operation and even possible damage to the float switches may result as the horizontal forces in the flow will cause the floats to knock against the concrete manhole walls.

Operation

  1. Once the water level starts to rise, the float will start to tilt. (H1 float switch is referenced in the example below).
  2. When the water level reaches the top of the cable weight, the float switch would have reached its threshold tilt angle.
  3. When the float threshold tilt angle is maintained for approximately 30 seconds or more, ALARM STATE will be reached, an SMS will be sent from the unit to pre-defined Cell #’s from the SCADA BaseStation.
  4. When the float threshold tilt angle is maintained for approximately 30 seconds or more, ALARM STATE will be reached, an SMS will be sent from the unit to pre-defined Cell #’s from the SCADA BaseStation.
  5. The BaseStation will then process and broadcast the relevant information to the respective groups of users.