The MSFM Sewer Flow Monitor is a versatile Ultrasonic Doppler Flow measurement system for sewers in the form of open channels or partially filled pipes. It is designed to monitor raw sewage, industrial effluents and storm waters.
Automatic GPRS Data Retrieval is standard and can be used worldwide. An additional standard input accepts an Ultrasonic Level Sensor for Storm Overflow Monitoring.
The MSFM123 flow monitor has a custom designed antenna which improves signal sensitivity in underground locations. It records the level, velocity and Aux Level (CSO) readings at regular intervals (1 to 60 minutes) and sends them to the host computer via SMS or GPRS at a user selectable frequency (typically once a day, once a week or once a month).
The ultrasonic level sensor uses patented algorithms to reliably determine
the time required for the incident soundwave to reflect back onto the sensor. The sensor also compensates for speed of sound change with temperature. The intelligent electronics within the sensor optimise the measurement process for minimal power consumption.
The Area Velocity Sensor combined with the MSFM123 electronics uses evolutionary Doppler processing technology to ensure accurate measurement.
The MSFM123 is easily set up on site using a step by step installation Wizard. This includes a signal strength test so that the best GSM operator may be selected.
Detectronic software provides support for local and remote communication with MSFM123 as well as powerful tools for graphing, analysing and exporting data.
At installation time, the user can set up the ultrasonic level sensor using his laptop, visualise the echoes from the target, and select the most appropriate measurement algorithm.
Specifications.
MEMORY
Non-volatile, Solid-state – 40KB per channel. Rotating store, or store until full.
LOGGING CAPACITY
20,000 Level1 + Velocity + (CSO) Level 2 reading
Equivalent to:
4 weeks continuous recording at 2 • minute intervals.
10 weeks at 5 minute intervals.•
RECORDING INTERVALS
1, 2, 5, 10, 15, 20, 30 minutes.
GSM / GPRS COMMUNICATION
Integral antenna – designed for underground use. Quad Band - 900MHz, 1800MHz (World); 850MHz,1900MHz (North America).
SERIAL PORT FOR LOCAL COMMUNICATION
Full duplex, asynchronous 1200, 2400, 4800, 9600 bps.
GSM COMMUNICATION POWER SUPPLY
User replaceable Lithium primary cell - battery life up to 7 years depending on mode of use.
Additional back up cell maintains logging and local communication when main cell is discharged.
CLOCK
Crystal controlled calendar clock with leap year adjustment. 100 seconds per month maximum error over operating temperature range.
Option to synchronise clock to GSM network.
ALARM DIAL-OUT
High/low alarms, independently programmable for Level, Velocity and U/sonic Level. Alarms transmitted via Internet or SMS text message.
ENVIRONMENTAL HOUSING - MAIN ENCLOSURE
Injection-moulded PC/ABS alloy and ACETAL with stainless-steel frame and carrying handle.
IP67 (submersible to 1m).
INTERNAL ELECTRONICS
Totally environmentally sealed. Operating temperature: -20 C to +50 C.
CONNECTORS
Waterproof IP68 Mil-spec for Local Communication, Level + Velocity + CSO sensor and Battery pack.
BATTERY PACK
ATEX Li-ion rechargeable (in safe area only). Field exchangeable – single cap-screw fixing and size 12 Military Connector.
Full charge gives 13+ weeks at 2 min. rate (max at 20°C ambient temp).
DIMENSIONS
510 x 150 x 110mm (max), including frame and Battery Pack.
WEIGHT
< 7kg - Including Battery-Pack, Frame and Level and Velocity Cables and Sensors.
APPROVALS
Intrisically Safe II 1 G
ATEX and IEC Ex approved (CSA pending)
Specification – Depth And Velocity Sensors
DUAL TRANSDUCER HEAD
Body
Machined PVC, Titanium and Polyurethane
Cable
Waterproof Mil-spec with additional PVC/Polyurethane armouring.
Standard length 10m.
VELOCITY SENSOR
Twin crystal Ultrasonic
Measuring Range
<0.05 – 4.0m/s
Resolution
1cm/sec
Non-linearity
± 1%
Accuracy
± 2.5% FS (± 1% in range 0.05 - 2.00m/s)
Operating Temperature Range
-2°C to +40°C
DEPTH SENSOR
Differential pressure – Titanium Isolated Silicon Diaphragm
Measuring Range
0.050m to 2.000m (at quoted accuracy and linearity) plus 2.000m to 6.000m surcharge range
Resolution
1mm
Non-linearity
± 0.1%
Accuracy
± 2% FS
Operating temperature range
-2°C to +40°C
Compensated temperature range
-2°C to +30°C
CSO ULTRASONIC DEPTH PROBE
Cable Length
Std: 10m
Measuring Range
0.25m to 3.000m
Accuracy
± .25% FS (Integrated temperature Compensation)
Beam Angle
10 degree (-3dB envelope)
Environmental
Operating Temp: -20 to +80C
Protection: IP68
