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Process, Instrumentation & Environment

Portable ATEX multi-sensor area velocity flow meter MSFM S2.5T – Detectronic

Designed to monitor raw sewage, industrial effluent and storm waters, the MSFM S2.5T is a self-contained, battery-powered, insertion multi-sensor flow meter, suitable for applications in combined sewers, open channels and storm sewers. The MCERTS version is certified to deliver guaranteed flow measurement accuracy.
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Industrial effluent and discharge monitoring, protecting streams and river waters, along with monitoring wastewater treatment processes are just a few of the many reasons for water sampling.
The MSFM S2.5T includes new processing technology that enables on-board flow calculation. With this, an alarm can be triggered to send a pulse to an automatic water sampler once a predetermined volume of water has passed. This is used for accurate flow proportional sampling.

The addition of a temperature sensor is hugely beneficial to users wanting to identify inflow and infiltration.
When tidal water or groundwater infiltrates the sewer water, there will be a change in the water temperature as well as a change to the volume of water in the sewer.
The MSFM S2.5T is compatible with 2G, 3G, LTE-M and NB-IoT GPRS networks, making it suitable for use anywhere in the world.

Data can be recorded at user defined intervals between 1 minute and 1 hour. Logged data is transmitted hourly, daily, weekly or monthly via 2G, 3G, LTE-M and NB-IoT GPRS at programmed intervals.
Using the velocity, depth and temperature to determine the flow rate ensures a more accurate reading that doesn’t require weirs or flumes and automatically adapts to changes in production and intense weather that can affect the flow rates.
Data is transmitted to a user-friendly, multi-language, secure web portal which users can access anywhere at any time.
DetecData allows settings to be modified and profiles created for alarms, thresholds, logging rates and transmission frequency. High/low threshold and profile alarms can be programmed to automatically forward to multiple users by text or email.
The MSFM S2.5T sensors run off a 12V lithium-ion rechargeable battery. Once fully charged, users can expect the battery to last in excess of 15 weeks when using a logging rate of 2 minutes.
The lithium-ion battery is rechargeable and has a typical life expectancy of 5 years.

Detectronic’s dedicated DATA CENTRE monitors your network and uses your data to detect blockages before they cause flooding and pollution. Using our data screening and reporting services, you can reduce the number of alarms received from thousands to hundreds.
Real-time data collection and monitoring helps you better understand your sewer network and using human intelligence means you only receive validated intervention reports. Site data, national rainfall data and local environmental data can be integrated for every site.
Designed to be compatible with data from any maker of telemetered monitors.


Velocity sensor
  • Type: dual piezoelectric elements;
  • Range: 0.03m/s to 4m/s (resolution 1mm/s).

Depth sensor
  • Type: hydrostatic pressure;
  • Range: 0.0m to 3.5m (resolution 1.0mm).

Temperature sensor
  • Type: Current Derived Resistance Bridge;
  • Range: 0°C to 50°C.

Optional (ultrasonic) LiDoTT® level sensor
  • Type: Piezo-ceramic, temperature-compensated;
  • Range: 0 - 1.5m.

Data logger
  • Memory: solid state 512k-max 60k per channel (rotating store or store until full);
  • Recording interval: programmable 1 - 60 minutes;
  • Data transmission: 2G/3G/LTE-M/NB-IoT GPRS communication worldwide compatibility - 15 minutes, hourly, daily, weekly, monthly at programmable intervals;
  • Logger power supply: 5 years typical life span internal lithium battery pack (user replaceable).

Main sensor power supply and operating capacity
  • Type: 12V ATEX Li-ion rechargeable battery pack;
  • Battery life: Full Charge = 30+ weeks at 5 minute logging rate.

  • Operating temperature: -20°C to +60°C;
  • Protection: IP68/NEMA6P;
  • Connectors: IP68 Mil - Spec;
  • Dimensions: 530 x 213 x 150 (maximum), including battery pack and protection frame;
  • Weight: 8.5kg (including battery pack, frame, depth and velocity sensors with standard 10m cables).

  • Sira 19ATEX2255X;
  • II 1G Ex ia IIB T4 Ga Ta = -40°C to +60°C;
  • IECEx SIR 19.0078X.

  • On-board flow calculation;
  • Multi-parameter measurements;
  • Flexible communications;
  • Multi-sensor technology for improved accuracy;
  • Data analysis;
  • Sophisticated alarm regimes;
  • Long battery life;
  • Data screening.

  • Monitor raw sewage, industrial effluents and storm waters in combined sewers, open channels and storm sewers.

F.Fonseca is the representative of Detectronic in Portugal.
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