The gas detector will be connected via a 4-20 mA transmitter signal to a small control device that will be used for remotely monitoring the gas levels. The control device will have 4 inputs and could monitor gas concentrations, level, flow, pressure, temperature, or any 4-20 mA transmitter. A unique GSM interface allows the control system to upload the information at pre-determined intervals, as well as during alarm events, the concentrations or levels for each channel. A web interface allows key managers to view the information from any computer. Reports can be generated as well as automatic email and telephone notifications when an alarm condition occurs. This system will operate as long as there is GSM cellular coverage in the area.
The entire system (gas detector and controller) can be powered directly by any 12-24 VDC. If local power is not available, an optional battery pack / solar panel; can be used to power the entire system. A number of installation packages for this option include a permanent pole mount installation as well as mobile push system.
Sample of Internet Software:
Any PC connected to the internet can access the information for each site remotely from a secure website. Upon entering the website, the user will be prompted for a user name and password. There can be multiple user names and multiple passwords allowing more than one individual to access the data.
Once logged in, the user will be able to select any location in the fleet. This can be done by selecting the name of the location from a list, or if the GPS option is enabled, a map with all locations will be displayed (as seen below).
When the cursor is placed above an individual location, the information from the last controller up load can be viewed. By double-clicking on the location, the user can send a command to that location and force an update, allowing the user to see the current readings at that time. If there are multiple locations, they will all be visible on the map.
The website also allows the user to set up notifications. This option will dictate on what type of events notifications will be sent out. Listed below in the “Event Labels” field are a few examples of events that can trigger notifications. These include power failures, gas alarms, or any type of level of flow alarm.
When an event occurs, there are two types of notifications that can occur; email notification and phone notification. For phone notifications, a phone number is entered into the system as well as a voice message that will be delivered when the call is made. In the grey boxes above (bottom of the screen), an example of a voice message is displayed.
Email notifications work in a similar fashion. The user enters the email address to which the notification will sent as well as the content of the email message.
Multiple email addresses and multiple phone numbers can be entered.
Each time an alarm occurs the customer will be notified.
The above is a sample of a report that can be generate from the website. Users can specify a date range and view all upload activity that occurred during that time. Uploads can specify a date range and view all upload activity that occurred during that time. The report will show the status of all 8 inputs as well as any message. In the example above, on April 9, 2007 an upload occurred at 4:12 PM as a result of a high LEL alarm. The gas reading on senor 1 (the LEL sensor) was 53%.
Controller: The hardware required for this system will be a 4-channel controller with GSM interface. The controller operates off of 12 VDC, has one output relay for local alarming and can take any 4-20 mA input (gas detector, anemometer, pressure, etc.). The iTrans gas detector has internal relays that can be used for additional alarm relays. If more relays are required, alternate solutions can be provided.
Gas detector: ProtectUS has a superior track record on off-shore platforms.