Fire suppression system remote monitoring

1. A fire suppression system comprising:

a plurality of tank units ( 40 , 42 , 44 , 46 ) each comprising:

a tank body having a first port and an interior for storing at least one of fire suppressant and driver gas;

a discharge assembly mounted to the first port and comprising:

a discharge valve ( 50 , 52 ); and

a first monitoring switch or sensor ( 230 ; 240 ); and

a first monitoring unit ( 100 ) coupled to the first monitoring switch or sensor of each said tank unit and configured to communicate with a remote monitoring location,

wherein the system further comprises:

for each of the tank units:

a second monitoring switch or sensor ( 260 , 261 , 280 , 290 ); and

a second monitoring unit ( 340 ) coupled to said second monitoring switch or sensor and configured to communicate with the remote monitoring location,

wherein at least one said first monitoring switch or sensor ( 240 ) and ( 230 ) is coupled to both the first monitoring unit and the respective second monitoring unit whereas at least one said second monitoring switch or sensor ( 260 , 261 , 280 , 290 ) is coupled to only the respective associated second monitoring unit.

2. The system of claim 1 wherein:

the fire suppression unit further comprises a hazard sensor ( 130 ); and

the first monitoring unit comprises an input from the hazard sensor.

3. The system of claim 2 wherein:

the hazard sensor comprises a smoke detector.

4. The system of claim 1 wherein:

the fire suppression system further comprises a pull box ( 132 ); and

the first monitoring unit comprises an input from the pull box.

5. The system of claim 1 wherein:

the discharge assembly comprises a control head ( 200 ); and

the first monitoring unit comprises a control output to the control head.

6. The system of claim 1 wherein:

for each of the tank units, the at least one second monitoring switch or sensor coupled to only the respective associated second monitoring unit comprises a liquid level sensor ( 260 ).

7. The system of claim 1 wherein the second monitoring unit comprises:

a radio ( 372 , 374 ).

8. The system of claim 1 wherein:

the at least one first monitoring switch or sensor coupled to both the first monitoring unit and the respective second monitoring unit is selected from the group consisting of pressure switches or sensors ( 240 ) and control head placement switches or sensors ( 230 ).

9. The system of claim 1 wherein:

the connections ( 250 , 252 ) from the first monitoring switch or sensor of the plurality of tank units to the first monitoring unit ( 100 ) are independent of the respective associated connections ( 350 , 352 ) of the first monitoring switch or sensor to the respective associated second monitoring unit ( 340 ).

10. The system of claim 1 further comprising:

a hand held device ( 400 ) in wireless communication with each second monitoring unit.

11. The system of claim 1 further comprising:

a gateway ( 600 ) in wireless communication with each second monitoring unit, each second monitoring unit configured to communicate with the remote monitoring location via the gateway.

12. The system of claim 11 wherein the gateway ( 600 ) comprises:

memory ( 622 ) storing information from the second monitoring units.

13. The system of claim 1 wherein:

the second monitoring units are configured to communicate ( 421 ) with each other.

14. The system of claim 13 wherein:

the second monitoring units are configured to communicate ( 421 ) directly with each other.

15. The system of claim 13 wherein:

the second monitoring units are configured to communicate ( 421 ) with each other via short range wireless communications mesh networking.

16. A fire suppression system comprising:

a plurality of tank units ( 40 , 42 , 44 , 46 ) each comprising:

a tank body having a first port and an interior for storing at least one of fire suppressant and driver gas;

a discharge assembly mounted to the first port and comprising:

a discharge valve ( 50 , 52 ); and

a first monitoring switch or sensor ( 230 ; 240 ); and

a first monitoring unit ( 100 ) coupled to the first monitoring switch or sensor of each said tank unit and configured to communicate with a remote monitoring location,

wherein the system further comprises:

for each of the tank units:

a second monitoring switch or sensor ( 260 , 280 , 290 ); and

a second monitoring unit ( 340 ) coupled to said second monitoring switch or sensor and configured to communicate with the remote monitoring location, wherein:

the second monitoring units are configured to communicate ( 421 ) with each other; and

the second monitoring units are configured to each store status data from all the second monitoring units so that any of the second monitoring units may communicate said data to a local handheld device.

17. The system of claim 16 wherein:

the second monitoring units are configured to each store said status data from all the second monitoring units at predetermined times; and

the second monitoring units are configured so a user of the local handheld device may manually activate said any of the second monitoring units to communicate said stored data from all the second monitoring units to the local handheld device.

18. The system of claim 16 wherein:

the second monitoring units are configured to wake up from a sleep mode in response to input from the second monitoring switch or sensor or the first monitoring switch or sensor.

19. A method for using the system of claim 1 , the method comprising:

with the first monitoring unit, receiving input from one or more hazard sensors ( 130 ) or pull boxes ( 132 ); and

with each second monitoring unit, communicating status via a radio.

20. The method of claim 19 further comprising:

with the first monitoring unit, controlling suppressant delivery.

21. The method of claim 19 wherein:

the connections ( 250 , 252 ) from the first monitoring switch or sensor of the plurality of tank units to the first monitoring unit ( 100 ) are independent of the respective associated connections ( 350 , 352 ) of the first monitoring switch or sensor to the respective associated second monitoring unit ( 340 ).

22. The system of claim 15 wherein:

the first monitoring unit has a communication module ( 314 ) configured to communicate via ethernet, cellular telephone or landline telephone.

23. A fire suppression system comprising:

a plurality of tank units ( 40 , 42 , 44 , 46 ) each comprising:

a tank body having a first port and an interior for storing at least one of fire suppressant and driver gas;

a discharge assembly mounted to the first port and comprising:

a discharge valve ( 50 , 52 ); and

a first monitoring switch or sensor ( 230 ; 240 ); and

a first monitoring unit ( 100 ) coupled to the first monitoring switch or sensor of each said tank unit and configured to communicate with a remote monitoring location,

wherein the system further comprises:

for each of the tank units:

a second monitoring switch or sensor ( 260 , 280 , 290 ); and

a second monitoring unit ( 340 ) coupled to said second monitoring switch or sensor and configured to communicate with the remote monitoring location, wherein the second monitoring units ( 340 ) provide local or remote monitoring and diagnosis of the suppression system without connection to or other use of the first monitoring unit ( 100 ).

24. The system of claim 23 wherein:

the fire suppression unit further comprises a hazard sensor ( 130 ) and a pull box ( 132 );

the first monitoring unit comprises an input from the hazard sensor and an input from the pull box; and

each of the second monitoring units do not comprise an input from the hazard sensor and or the pull box.

25. The system of claim 23 wherein:

the fire suppression unit further comprises a hazard sensor ( 130 ) and a pull box ( 132 );

the first monitoring unit comprises an input from the hazard sensor and an input from the pull box; and

each of the second monitoring units do not comprise an input from the hazard sensor and or the pull box.