CNML in Rotorua, New Zealand, chose the QTech SMS Controller to provide remote cellular control for four Department of Conservation Volcanic Risk Warning signs along the length of NZ’s famous Tongariro Alpine Crossing.
With its robust confirmation texting, status reporting and class-leading configuration software, QTech Data Systems SMS Controller was the right choice for such a crucial alert application in what is a demanding alpine environment.
Seismic instruments are connected wirelessly to the QTech Data Systems SMS Controller.
When an event is triggered it activates either an alarm, turns on a light and/or sends a text to predetermined recipients.
The settings at which events are activated are pre-programmed into the SMS Controller and can easily be adjusted.
The QTech Wireless Point to Point (WP2P) has been successfully operating at an industrial site in an environment which has high exposure to toxic substances. Due to the highly corrosive nature of these chemicals it was not feasible to run a control cable around this particular area of the plant. The WP2P is being employed to start a pump which discharges alkaline when the acidity level in large tanks reaches a regulated maximum intensity. The QTech 900 MHz WP2P, using the supplied stub antenna, provides enough signal strength to ensure reliable pump control despite one module being in an adjacent building. At this site the signal must ‘see’ through a host of industrial steel pipe work, concrete block, fibrous walls and other structures to the receiving module, which activates the pH balancing pump, some 40 metres away in a direct line. If greater distance or stronger signal strength is required higher gain antennas are available from DATRAN Australia.
Key Features of the solution include;
Operational Range: Up to 350m with the supplied antennas, ~2km with optional whip antenna (line of sight)
- This can be increased further by using a Yagi Directional Antenna or a WP2P Repeater module (environment dependent)
- True relay output – up to 24V/2A
- State of the art digital radio using 900 MHz digital modulation technology
- Link Status LED helps diagnostics and confirms a signal path between modules.
New Zealand contractor, Hypower, deployed the QTech SMS Controller to monitor an on-site concrete curing facility for HEB Construction. The facility was designed to pour 26 x 30m long reinforced concrete beams, weighing several tonnes each, for use in the reconstruction and upgrade of the earthquake damaged Ferrymead Bridge, an important eastern link between Christchurch city and the coastal district of Sumner.
An ‘accelerated curing process’ was employed using a special temperature maintained water jacket to assist with reducing the standard curing time from 7 days to just 24 hours. Problems with maintaining the water jacket seal, water temperature and power supply at the facility were creating headaches for the site engineers and delays repeatedly disrupted the concrete pouring schedule.
QTech Data Systems SMS Controller monitors Temperature, Pressure and Mains supply alerting shift personnel of any changes or issues that occur after hours reducing unnecessary delays the following day when all staff are on site.