Xylem H-3521 - Manual (Page 11)

Chapter 2
Installation
H-3521
Installation 2-1
Figure 4 Sensor and Cable
2.1 Installing the W ATER LOG ® H-3521
The W ATER LOG ® H-3521 is a digital pressure transducer specifically designed for water level
monitoring. The H-3521 directly measures water or other fluid pressure over a broad
temperature range. Typical applications include monitoring snow pillows to measure snow pack,
measurement of water in accumulating rain gauges, and fluid pressure in weirs and dams. Before
proceeding with the installation, please consider several site preparation and maintenance issues:
2.2 Water Depth
The following chart shows the maximum pressure to which the H-3521 is factory calibrated. The
sensor can survive temporary operation up to twice the maximum rated pressure for you model’s
range. However, any measurements made beyond the rated pressure will be inaccurate. The H-
3521 will be damaged if it is subjected to twice the maximum rated pressure.
Model Pressure Range Water Depth Range * Accuracy
H-3521-15 0 to 15 psi 0 to 34.60 ft. +0.01 ft
H-3521-30 0 to 30 psi 0 to 69.20 ft. +0.02 ft.
* NOTE: Depth calculations are derived from the standard equation that one PSI is generated by
a column of water 27.680 inches deep at 39.4EF.