Half a croissant, on a plate, with a sign in front of it saying '50c'
h a l f b a k e r y
The halfway house for at-risk ideas

idea: add, search, annotate, link, view, overview, recent, by name, random

meta: news, help, about, links, report a problem

account: browse anonymously, or get an account and write.



Please log in.
Before you can vote, you need to register. Please log in or create an account.

Low Cost Alarm

Move towards old age system but it is workable !
  [vote for,

Normally for any parameter measured in field & indicated in some control room, separate instrumentation is required for indication & alarm.

For example consider oil level measurement in tank located 100 metre away from control room by means of ultrasonic transducer, signal conveyed to control room & displayed by means of analog scale-pointer arrangement. Now for alarm, separate instrumentation would be required (cabling, signal conditioner/ distributor etc.etc.).

The proposed idea is to put an inexpensive electric bell (or similar sort of inexpensive buzzer) next to above analog indicator. When pointer moves beyond predetermined limits, a suitably thin wire (that would practically not resist pointer movement ) would touch a strip to close the circuit & actuate buzzer/ electric bell to prompt operator action.

vedarshi, Nov 15 2004

meter relay http://www.simpsone...pdfe/3300%20VDC.pdf
analog meter with adjustable relay contacts [csea, Nov 15 2004]


       Baked, see [link]. Interestingly, searching for "meter relay" on Google brings up a bunch of hits about race running...
csea, Nov 15 2004

       If you have ultasonic technology, then I don't understand the need for indicators with alarm contacts. Why don't you install a DCS or PLC system?
Ling, Nov 15 2004

       [ling]the whole idea is based on cost reduction. if you put analog indicator in control room & proposed alarm based on pointer movement, the involved cost would be nothing compared to PLC or DCS.
vedarshi, Nov 15 2004


back: main index

business  computer  culture  fashion  food  halfbakery  home  other  product  public  science  sport  vehicle