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| What is the best way to record pressure readings at various sites in my system? |
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| Until recently the only way to record pressure at remote sites, such as various hydrants, around your water system was to use a battery-operated chart recorder. These chart recorders usually come in either 4" or 8" chart sizes and the pen arm is operated directly by a pressure-sensing element in the unit. The advantage of a chart recorder is that you get and instant record of what has been happening in your system in the form of a circular chart. A disadvantage of chart recorders is that you are limited to a maximum of seven days on a chart, and 24 hours is realistically all a 4" chart can manage with any resolution. Also, a chart recorder is at high risk of being stolen when left unattended on a hydrant or other remote site. |
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| The pressure datalogger is a recently introduced solution to the problems inherent with pressure chart recorders. The datalogger is a small (less than 2" diameter) compact device with a standard 1/4" NPT gauge connection that electronically records pressure at user-defined intervals. It is possible to record more than thirty days of pressure readings with excellent resolution using a datalogger. The datalogger is easily set up and the data downloaded with an easy to use Windows-based software program. The data can be viewed and printed in various formats with the logger software or it can be transferred to a spreadsheet program. |
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| Another great advantage of the pressure logger is that it is small and much less noticeable than a chart recorder. It connects directly to the pressure source without a hose and can be easily disguised to look like a hydrant cap or something that won't catch the interest of potential vandals or theives. The pressure logger is also water proof and much less subject to damage from the elements than a chart recorder. Given the fact that the pressure logger costs about the same as a 4" chart recorder (plus the one-time software & cable), it is hands-down the best way to record your system pressure. |
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