# Wireless monitoring

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#### Pierre Desrochers

Hi all -

I am trying to find wireless transmitters wich will send continuously an ON or OFF state to a receiver. This setup has up to 100 transmitters
and only one receiver. We need to record those states duration in a database in a PC. Then we would treat the data and generate a printout.

These transmitter need to carry over a distance of 1000 feet. Its in a plant and the PC and receiver section will be in a remote office.
This is not a high speed application. Scan time could be 30 seconds.

No control is involved. Only monitoring and data analysis.

Can you give me a direction on where to search for such a thing. I have surfed toward Intrusion alerts, Automotive equipments and many more but
have failed to find anything that would suit this industrial application.

Many thancks

Pierre

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#### Ramer-1, Carl

Pierre:

You may find what you need at http://www.inovonics.com/.

I've used their products for both monitoring and control (discrete) with great success. They use 900 MHz Spread Spectrum technology with uniquely coded transmitters and have several models of receivers. You can
program the mode of operation to suit most needs.

Carl Ramer, Engineer
Controls & Protective Systems Design
Space Gateway Support, Inc.
Kennedy Space Center, Florida

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#### Pat Schmid

The key component of this project is price. What have you budgeted for pricing?

This would determine if an "industrial" solution feasible.

Thanks,

Pat Schmid

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#### Robert Philliips City of Wichita Falls C

Robert Phillips
City of Wichita Falls

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#### Jose Chong

Pierre,
There are several brands of RTU (Remote Telemtry Unit) to gather several inputs and send via UHF to the receiver. The RTU is solar powered and has a battery to keep the unit running over the night. You might want to try the brand "Baker" among the other Fisher & Rosemount. To improve the data management, some systems allows the data download as package when the receiver request for rather the single data transfer multiplexing method.
Jose Chong
Field Instrument Eng.

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Pierre,

Ed Meltzer

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#### Pierre Desrochers

We evaluated the cost to be in the range of 1000 per transmitters and 1000 for the lone receiver. So for 5000 we could bring 4 signals to the PC end. Bear in mind that we do not look for anything other than one ON or OFF signal per x-mitters. This is not a full RF Network type of app. it's only a wire, pipes and manpower saving solution. I had a nice package submitted by the people of RFData in Florida. The question is how can we simplify to the extreme the installation, configuration and startup of this system without compromizing on riliability ...

During the dev. phase of our systems we sometime need temporarly to op signals from one place to another. This type of equipment I searh would
also give us this option ...

Pierre -

PS : This list is full of fantastic technicaly enclined people who help us make giant leaps in our technical education - Merci beaucoup ...

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