HPR 31

The Intelligence of your Hydrants

The HPR range of pressure recorders provides a very simple solution for the monitoring of distribution pressures on water networks and the diagnosis of anomalies (abnormal drops or rises, water hammer, etc.)

The HPR31 and HPR31i models are the most economical entry-level models, with manual data collection.

See models HPR32A and HPR32iA for more advanced solutions with extended performance and integrated telemetry.

Applications

Monitoring of distribution pressures
Identification of abnormal pressure transients (HPR31i)
Checking flows and capacities
Fire safety guarantee
Validation of hydraulic models
Citizen pressure tests (sprinkler system adapter)

Main benefits

Very simple installation on hydrant or sprinkler valve
Discreet and secure integration into the hydrant
Simultaneous measurements at several network terminals
Recording of measurements with time and date stamps
Can be coupled with other data loggers installed on the pipes
Fewer staff required for measurement campaigns
Associated software for data processing and analysis
Accessories available for easy testing of fire hydrant capacity/flow rates

Specifications

Models HPR31 (standard) and HPR31i (with rapid measurements of transients, water hammer...)
Battery Powered (1 to 5 years, depending on the setup)
RS232 serial communication
Ranges 0/100 psi, 0/200 psi, 0/300 psi (HPR31)
Ranges -15/100 psi, -15/200 psi, -15/300 psi (HPR31i)
NSF/ANSI 61 and 372 certified
Programmable sampling rate:
— 4/sec to 8 hours (HPR31)
— 20/sec at 8 hours (HPR31i)
Programmable recording frequency between 1/sec and 8 hours
Base capacity: 80,000 data readings (Min, Average, Max values)
Transient capacity (HPR31i): 250 events, 3 hours of data before/after transients
Transient events detected on configurable threshold values (rate of change of pressure, positive or negative)
Accuracy: +/- 0.25% of full scale
Resolution: 0.025% full scale