Crowcon’s new Detective Net wireless module is designed to allow up to 25 Detective+ gas detectors to be linked without cables. It is ideal for use in the oil, gas, petrochemical and utility industries, according to Crowcon.
The Detective+ is a free-standing, transportable multigas monitor that can be used individually or in groups to monitor up to four gases at once. By using the Detective Net module, up to 25 Detective+ units can be linked wirelessly and positioned as much as 100 metres apart. Should wireless connection between two of the detectors weaken, the RICOCHET wireless network will ‘self-heal’ and automatically re-route communications via alternative devices. This creates a ‘mesh’ type network, ensuring greater reliability in safety-critical situations.
Over a dozen gas sensor options are available with the Detective+, including infrared sensors for flammable gas that are immune to the poisoning effects which plague standard flammable gas sensors. If a dangerous gas level is detected, the Detective+ unit warns with a wailing 104 dBA siren and flashing, high intensity LED beacons which are visible from all angles. A signal is also sent to all the other units, alerting workers to the danger. In addition Detective Net transmits other fault information such as loss of signal or low battery power.
If the signal is very weak, for example because of thick metal bulkheads, Detective Net can act as a repeater to boost the signal between units. A cable can even be used to extend the reach of an individual Detective+ unit and put it in a position with a stronger wireless signal – this is especially useful in cramped, confined spaces.
The Detective+ is indeed ideal for confined spaces, ensuring safe gas levels before workers enter and monitoring continuously during welding and other repair work. With 60 hours of battery operation, work can go on with a minimum of detector recharging, keeping shutdown time as short as possible. In commissioning new liquefied natural gas (LNG) plants, the Detective+ can be placed along the pipelines to check for leaks, minimising explosion risks.
The rugged tripod construction and raised profile keeps the Detective+ sensors away from obstructions and surface water. An integral safety cage gives extra protection in the event of the unit being overturned in chaotic work areas. An operating temperature range of -20°C to +40°C assures reliable detection in a variety of environments. The units are Class 1 Division 1 Groups A, B, C, and D approved. Optional folding legs facilitate compact storage and transportation.
