In service with municipal authorities around the country, these systems continually monitor the condition and quality of stream, effluent or process water and automatically generate remote alarm messages.
In the event of measured values exceeding preset limits, alarm messages can be transmitted as SMS text or SMS-to-voice messages to mobile phones, landline phones or pagers.
These messages identify the station’s location, the parameter (or parameters) out of range, and the date and time of the event’s occurrence.
The system also provides for authorised persons to call into the station (through the GSM or CDMA cellular telephone networks) at any time, to interrogate the system and, if necessary, to download historical or current stored data.
In addition, SMS messages can be sent to the monitoring system to directly control outputs or request current parameter measurements.
The Monitoring System typically comprises the following:
- Industrial-quality submersible water quality probes for such parameters as conductivity (TDS), pH, turbidity (suspended solids), temperature, dissolved oxygen, ORP, etc
- A dataTaker DT50, DT500 or DT800 data logger
- A GSM or CDMA cellular data terminal (such as the dataTaker SMSX cellular data terminal)
- A battery-backed solar or mains power supply
- Pacific Data Systems’ own RemTerm Water control software, customisable to suit each customer’s specific requirements
Additional functionality can include control of automatic water samplers or diversion valves (to a holding tank) whenever an alarm event was detected.
The TWM2000 offers the following advantages:
- Continuous automatic monitoring of the waste or process stream;
- Automatic alarm initiation in the event of an ‘out-of-range’ condition being detected for any of the parameters being monitored
- Maintenance of a continuous analysis log of each of the parameters being monitored
In the case of a local authority, the system enables that authority to carry out a continuous watch over the quality of the effluent being discharged into its sewers and to receive notification of any excesses that might occur, before the causative waste material reaches the authority’s treatment.