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How to relatively "budget" implement temperature monitoring of a facility?

robokop 813 19
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Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
  • #1 20905365
    robokop
    VIP Meritorious for electroda.pl
    The assumptions are as follows - 4 fairly large rooms in which a relatively high and constant temperature - between 22 and 32 degrees C - must be maintained. Heating is realised with a separate combustion blower for each room. While during the day someone constantly monitors their operation, this is troublesome at night. A momentary power failure disables these blowers; they do not restart on their own. Likewise, a fault in any of them - causes the temperature to drop dramatically. The assumptions of the system are as follows:
    4 separate temperature sensors for each room, with the necessity that each of them monitors separately. A temperature drop below the threshold defined for the sensor, should trigger an alarm - i.e. the customer's phone should ring, displaying "alarm1", "alarm2 "etc. Wifi and web applications are out of the question.
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  • #3 20905423
    robokop
    VIP Meritorious for electroda.pl
    One such would pass the test - it supports 4 sensors, which is all that is needed. The problem is that it only sends an SMS - and I need it to ring until it drops, i.e. the user rejects the call.
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  • #5 20905437
    robokop
    VIP Meritorious for electroda.pl
    No apps on the phone. This module from the link has another serious drawback for my application - mains-only power supply. So you would still have to invest in an ups.
  • Helpful post
    #6 20905443
    panzewsi
    Level 22  
    I would take the Satel GPRS-A. I think it supports 8 1-wire sensors, has 4 outputs, sends text messages and makes calls. And it has an application.
    Eventually any control panel with a sim card, e.g. Satel Perfecta and any thermostats connected to the detector inputs of the panel - their shorting/unscrambling would cause an alarm and a phone call to the owner plus possibly an SMS and an application, but I think it would be simpler and cheaper to use the GPRS-A.
  • Helpful post
    #8 20905758
    TvWidget
    Level 38  
    robokop wrote:
    The client's phone should ring, displaying "alarm1", "alarm2 "etc. Wifi and internet applications are out of the question.

    For this you probably need 4 separate GSM devices with separate SIM cards. In theory you could get around this by first sending an SMS with the alarm number and then doing a CLIP. However, this will not be as described.
  • #9 20905800
    robokop
    VIP Meritorious for electroda.pl
    TvWidget wrote:
    Theoretically this could be circumvented by first sending an SMS with the alarm number and then performing a CLIP.
    This would fully satisfy.
  • Helpful post
    #10 20905805
    TvWidget
    Level 38  
    An estimate of how far apart are these rooms ?
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  • Helpful post
    #11 20905812
    panzewsi
    Level 22  
    In GPRS-A you can set up something like this, that when a certain threshold is exceeded on a detector it will make a call, send an sms with the detector name and you can see what is happening in the app. If you were to do it with thermostats and a control panel, you could also set it up so that when an event occurs it calls and sends a text message to the same person, or there could be a notification from the app running in the background.
  • #12 20905874
    robokop
    VIP Meritorious for electroda.pl
    TvWidget wrote:
    Estimated how far apart are these rooms ?
    One hall about 20m long, divided into 4 chambers.
  • Helpful post
    #13 20905899
    TvWidget
    Level 38  
    In the context of an organic budget and battery power supply, determine what delay is acceptable between exceeding the alarm temperature and receiving notification ?
  • #14 20905923
    robokop
    VIP Meritorious for electroda.pl
    As little delay as possible. Battery powered for a simple reason - a power outage, shuts down and blowers. When the GSM modem is powered from the mains, without power there will be no notification.
  • #15 20906120
    TvWidget
    Level 38  
    The term "delay as short as possible" does not really say anything. The room temperature does not change quickly. The response to an alarm is unlikely to be immediate either. Is, for example, 30 minutes acceptable?
    You must distinguish between devices designed for battery power only and those with battery backup in the event of mains power failure. In the alarm industry, battery backup is mainly used. However, there are also battery backup solutions. The current-consuming GSM modem is switched on occasionally to send an alarm or notification of its operation.
  • #16 20906161
    robokop
    VIP Meritorious for electroda.pl
    I don't understand what you are asking. The temperature in the room changes very quickly - poorly insulated walls. While the 80kW blower heats them up fairly quickly, this heat is quickly lost due to the min. high humidity. In the event of a breakdown, a spare blower must be brought in from the farm building at short notice or, in the event of a power failure, a generator must be run - which also takes time (generator driven from the tractor's PTO). Blowers have a temperature hysteresis of around 4-5 degrees C, so a temperature drop below say 25 degrees C should trigger the alarm. Of course, this threshold temperature for triggering the alarm should also be adjustable.
  • Helpful post
    #17 20906201
    panzewsi
    Level 22  
    You have everything you need in a solution using either the control panel or the GPRS-A module. The control panel operates on mains power through its transformer and power supply, and a 12V 7-18 Ah battery is mounted in the enclosure, which can keep the system running for at least a couple of hours. The GPRS-A runs on 12V and here too a battery pack can be given a buffer supply. The 1-wire detectors are powered from the module and the 1-wire bus is said to have a range of about 100m, so this should be sufficient for you, with ordinary thermostats the distance is unlikely to matter as you only need to transmit the 0/1 signal.
  • #18 20906260
    TvWidget
    Level 38  
    Without going into technical details, battery power is often associated with putting the device to sleep. Put simply, putting the device to sleep means that the temperature is measured periodically at a certain time, e.g. every 15 minutes. This can cause a delay in sending the alarm. In the case of an intrusion notification this is not acceptable but in the case of temperature monitoring some delay is acceptable.
  • Helpful post
    #19 20906949
    jimasek
    VIP Meritorious for electroda.pl
    If it is to be budget then 4 simple mechanical thermostats with COM/NC/NO contact in each room plus a Ropam GSM module.
  • #20 20915898
    ropam

    Level 18  
    Rather better to use NeoGSM-IP-64 or NeoLTE-IP-64 + 4 temp. sensors x TSR-1.
    After the threshold is exceeded, you can call and record 4 messages.+ option to send SMS/e-mail messages.

Topic summary

The discussion revolves around implementing a budget-friendly temperature monitoring system for a facility with four large rooms requiring constant temperature maintenance between 22 and 32 degrees Celsius. The user seeks a solution that includes four separate temperature sensors, each capable of triggering an alarm via phone call when the temperature drops below a defined threshold. Various solutions are proposed, including GSM temperature loggers, the Satel GPRS-A module, and mechanical thermostats combined with GSM modules. Key considerations include the need for battery backup to ensure operation during power outages, the acceptable delay for alarm notifications, and the requirement for the system to function without reliance on Wi-Fi or web applications. Suggestions emphasize the importance of adjustable alarm thresholds and the potential use of 1-wire sensors for effective monitoring.
Summary generated by the language model.
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