15. Tunnelsymposium SIGRIST-PHOTOMETER AG in Biel
This event is only in German available!
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The FireGuard detects emerging fires already at their early stages (cold smoke). The sensor uses the available natural air stream in the tunnel. Any influence caused by fog will be eliminated by optional heating elements. The sensor is very compact and has neither movable parts nor wear parts nor does it need consumables. As a light source, an economical LED is used. An adjustable bracket allows mounting at the wall, in the arched section or at the ceiling. Special models for installation in the intermediate ceiling or directly in the ventilation dampers are available. Various ways of connections allow a flexible system integration. Individual setting of parameters allows an optimal object and location related setting of alarms, there are no false alarms.
Maintenance is limited to occasional cleaning and the automatic adjustment with a control rod. Soiling monitoring provides information on the state of the instrument. Maintenance is only necessary when required, from experience only about every 5 years, and the time required per instrument is normally between 15 and 25 minutes at the most.
Water Disinfection Measuring System
The measuring system includes everything needed for disinfectant measurement: instrument, sensor, assembly and wiring pre-mounted on a measuring panel. The system is used for measuring free Chlorine, Chlorine dioxide, Ozone or Hydrogen Peroxide.
Measuring parameter and measuring range can be chosen in the menu. The integrated armature ensures a constant flow of approx. 30 l/h. As a consequence the system provides stable, precise and reliable measuring values. Flow fluctuations are not any longer shown up in the measuring curves as long as a water inlet flow of above 35l/h is guaranteed.
For measuring free Chlorine, Chlorine Dioxide or Ozone a double gold sensor is used, for measuring in brine a special graphite-platinum sensor is available.
For the measurement of Hydrogen Peroxide, a double platinum sensor is used.
Temperature and flow is guarded by a further sensor, which additionally can be used for grounding.
The control unit with touch screen operation includes an input for the measurement and temperature, one digital input, one analogue output and alarm relay, as well as an automatic sensor cleaning.
Optionally, a system with integrated pH-measuring electrode is available which compensates pH fluctuations.
The complete system is pressure resistant up to 6 bars at 20°C.