Wireless, Battery-Powered Pressure and Impulse Monitoring


The Telog HPR-32iA is an ideal pressure monitoring solution for pressure monitoring, transient analysis, fire flow testing, customer pressure concerns, and hydraulic model calibration. The Telog HPR-32iA recorder measures water pressure at user programmable rates up to 256 samples per second with an internal pressure transducer. The recorder then computes any combination of the minimum, average and maximum values according to your selection of statistics and recording intervals. For example you can measure and store the maximum, minimum and average pressure at 5
minute intervals for more than 90 days (when impulse monitoring is disabled).

The impulse recording option feature of the Telog HPR-32iA units stores the waveform of captured transients. The HPR-32iA can store up to 125 events of variable duration that may occur over many months of on-site monitoring,
up to a maximum rate of 256 samples per second and a total of 42,000 data values. 

Trimble Unity software combined with Telog wireless hydrant pressure recorders provide a GIS-centric cloud and mobile platform for monitoring system pressures, transients and trends, min, max and average pressure history at any user defined interval. Hydrant pressure recorders can store data internally for many months and wirelessly transmit on a defined schedule and provide alerts and alarms in response to pressure faults or transients, delivering a complete solution for proactive pressure and leakage monitoring and management.

Wireless Communication
The power of every 32 series recorder from Trimble Telog is wireless data transfer capability. Using cellular technology enables unmanned monitoring of remote sites as well as instant updates and alarm notifications. The iLR-32iA uses
a low power, LTE/Cat 1 cellular communication modem certified on Verizon Wireless.

Battery Power
All Trimble Telog hydrant pressure recorders have low power requirements so they can be battery operated. The HPR-32iA series uses a user replaceable BP-4 lithium battery pack. The battery life of a HPR-32iA depends on the sampling resolution chosen in addition to the call schedule (see table below for examples ). With user configurable call and sampling rates, you get to choose the best configuration for your application.

Packaging and Installation
Every hydrant pressure recorder from Telog is a low-profile, rugged unit that is easily installed by one person on a standard 2.5 inch hose nozzle outlet. For ease of mind, an optional security cover can be used to prevent vandalism. Once installed, data is immediately available using the range of Trimble software solutions on the cloud or on premise.

Software Support
The Telog HPR-32iA is compatible with all Trimble software applications, including Trimble Unity, Telog Online (cloud), Telog Enterprise and Telogers for Windows application software. This ensures that utilities have a complete solution
addressing all their remote monitoring needs across their operations, delivered in a manner that suits each individual utility’s operations and IT needs.

Certified to NSF/ANSI 61 and 372


Telog HPR-32i applications include:

  • Customer pressure complaint investigation

  • Pressure loss testing

  • System pressure monitoring

  • Water hammer monitoring

  • Calibrating hydraulic models

  • Fire flow testing

  • Hydrant capacity testing

  • High speed sampling to 256 samples/second

Get the Telog HPR-32iA

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Five of the most popular uses of the Telog HPR


Model: Telog HPR-32iA

Type: Strain gauge, isolated pressure sensor with wireless
Range (psi): 200, 300 (contact Telog for other ranges)
Over Pressure (psi): 600, 600
Burst Pressure (psi): 1000, 1000
Resolution: 0.025% of full scale, 12-bit
Accuracy: ±0.25% of full scale at constant temperature
Temperature Effect: ±0.015% of full scale per oF

Sample Rate: Programmable from 256/sec up to 8 hours
Data Recorded: Selectable min, max and average pressure per interval
Interval Period: Programmable from 1 second to 8 hours
Memory Total: ~82,000 data values (Shared between Impulse and normal data)
Impulse On: Note: Normal mode operates as specified above when impulse mode is on or off.
Data Recorded: Normal mode interval data plus transient event waveforms including pre and post transient event data, user configurable.
Transient Trigger: Pressure rate-of-change; either positive or negative; user configurable
Impuse Memory: Up to 125 transient events to a maximum of 41,000 samples after which new data will overwrite oldest data.

LocalRS-232: 5 pin circular connector rated IP67 Auto-selected baud rate to 19.2 kbaud
Cellular: Internal Telog WM2/L1 cellular modem LTE Category 1 certified Verizon Wireless
Local Bluetooth: BLE 4.1, Bluetooth low energy max range is 20 feet in open field line of site 

Battery Factory installed, field replaceable Telog BP-4 lithium battery pack
Battery Life: Up to 2800 data calls to host computer
Examples: Call Frequency Sampling Frequency Battery Life
1/day 4/second 5 years
1/day 128/second 2 years
1/day 256/second 1 year
(@ very good to excellent signal strength)

Support Software
S-3PC: Telogers for Windows® 6.51 or later
S-3EP: Telog® Enterprise 6.51 or later
DHS-Service: Telog Online
TW-UNITY: Trimble Unity

Operating: 40° to 150°F [4° to 66°C]
Storage: -40° to 150°F [-40° to 66°C]
Note: For applications below this operating range please contact your Trimble Telog support team.
Humidity: 0-100% relative humidity
Enclosure: NEMA 4x/IEC IP65
Size: 5” diameter x 3.5” [127mm diameter x 89mm]
Thread:* Hydrant mount: 2.50” NHT standard (see side view) Contact Telog for non standard thread Internal mount: 1/4” NPT
Security Cover: High impact nylon security cover. Choose from yellow, red or gray to best match hydrant color. Lockout hasps included.
Certified to NSF/ANSI 61 and 372

Get the Telog HPR-32iA

Request a Quote



Monitoring Progress: Nailing Down Water Hammer And Its Implications

By Telog, A Trimble Company

If you don't know what a water hammer is, well, that's a big part of the problem. It's an all-too-frequent issue for water systems everywhere, striking in pipelines that are growing more susceptible to failure as they age.

Read More