The completely updated PFL1 range of data loggers is based on the field-proven design of the PTRI/TRI model and utilize our patented data logging architecture that allows the user to monitor pressure/flow inputs in a multitude of configurations providing ultimate flexibility to meet specific application requirements.

The GCRTech PFL1 stores data in non-volatile memory organized into data files. Each data file is an independent data logger with its own start/stop time, sample rate, and logging rate. More than one data file can record different types of data for the same input channel.

Different types of data include Average, Instantaneous, Minimum, Maximum, etc. The memory register size is designed to be ready to accommodate overflows associated with high pulse rates on Flow inputs.

Pressure measurement accuracy is optimized using multi-point calibration. Logged data can be re-calibrated before, during, or after the recording by recalibrating the pressure transducer to the logger.

Local communications via fast non-contact IrDA communications link (115,200 baud). The logger firmware can also be upgraded in the field via the IrDA communications link.



Combined pressure & flow data loggerProvides users with the option to independently log pressure or flow data while further having the ability to log both parameters at the same time.
Adjustable data logging & sampling rate for enhanced data resolutionAdjustable pressure & flow data sampling rates to fit every job. Sampling rate: 1 second to 15 minutes; Logging rate: 5 seconds to 24 hours.
Comprehensive data-type loggingGives users the choice to simultaneously or independently log a wide selection of data types, including maximum, minimum and average pressure.
Large internal memory bank for data storageProvides the flexibility for short to mid-term field deployments with sufficient memory to capture 3+ months of high-resolution data
IP68 waterproof ratingThe PFL1 will continue to operate even when completely submerged in water or when exposed to dusty/dirty/sandy environment
Engineered for the fieldPortable light design which can fit in a pocket but withstand the harshest environments (-20 to 70 degrees C, -5 to 160 degrees F)
Robust battery lifeField life of battery is 5+ years under normal operating conditions; draining on battery life is negligible when not recording – no need to worry about battery drain when not utilizing the unit.
Internal/external pressure configurationVersatile internal versus external pressure transducer design allows for use in all field applications




2 MB Flash non-volatile memory organized into 6 separate data files – 60000 reading each and 2 separate data files – 250000 readings each

Sampling Rate:

Configurable Sampling Rate: 1 sec – 15 min

Logging Rate:

Configurable Logging Rate: 5 sec – 24 hrs


Pressure transducers:

20 Bar / 290 psi Range Standard

Pulse Rate:

Std. 80/second – Max 400/second optional

Flow Meter Sensors:

Compatible with all major meter manufacturers that are equipped with a digital pulse output.

Documents & software

MOBILTEX GCRTech PFL1Product BrochurePDF
MOBILTEX GCRLog Software – please CONTACT USData logger software [programming, downloading & graphing]Zip File

Applications / Use Cases

The PFL1 allows for high-resolution pressure logging investigation to assess the root cause of various pressure anomalies. Sparsely placed permanent pressure monitors can highlight an anomaly but often times will not pinpoint its exact location or cause of the issue; using lift and shift portable pressure monitors like the PFL1 can increase the resolution of the root cause investigation to help quickly find and correct the anomaly.

Should a water customer complain of low pressure in their home or business, a municipality/utility can use the PFL1 to quickly log & record pressures on various hydrants in the area and/or on the customers service connection. Pressure data can is quickly acquired from the ease of the PFL1’s installation, and can be used to assist in resolving the complaint. Additionally, if a user can confirm consistent pressure on the distribution side, the municipality/utility can rule the pressure loss to the customer’s property side plumbing system.

Typically used for service-based/engineering consultant-led temporary projects. The primary use of the PFL1 pressure logger is for leak detection, water balance baseline data collection, or temporal model calibration data in cases where the utility doesn’t warrant/can’t yet afford a permanent network of pressure monitors. This also serves as a great “trial/demo” opportunity for the municipality to highlight critical pressure points & build towards a more robust permanent installation base of pressure monitors.

Allows for short term monitoring of localized pressure within a specific pressure zone/at critical water users within the pressure zone (particularly in new construction areas). Reviewing the data captured by the PFL1 pressure loggers will ensure that the water utility minimum level of service for supply pressures is maintained across the entire pressure zone. The PFL1 can also be utilized to log and record pressures on either side of a closed pressure district boundary valve to ensure there is a pressure differential and that the pressure zone valve is effectively closed.

Increases a user’s visibility into pump start/stop times from outside the fence of the pumping station. This is done by installing the PFL1 pressure logger on a local appurtenance such as a fire hydrant located near the subject pumping station. The PFL1 can showcase when pumps kick on/off allowing the user to build an accurate pump timing network which can be adjusted accordingly to increasing overall system efficiency. By utilizing the min/max pressure surge monitoring features of the PFL1, pressure surge detection can be captured identifying the need for a more thorough monitoring study using advanced GCR TRID-T portable transient loggers.

This use case is geared towards water utilities which utilize temporary district metered areas (DMAs) to establish leakage levels and target leak detection activities. Monitoring the average zone pressure and critical zone pressure points within the temporary DMA using the PFL1 pressure logger is critical to assess and correct the minimum night flow readings & calibrate pressure to establish the true leakage volume levels. In addition, the flow monitoring feature of the PFL1 can be utilized to log pressure and flow at the temporary DMA supply point(s).

Use of the PFL1 to log pressure during commissioning of a new watermain during construction will assist with performance assessment during swabbing and hydrostatic pressure testing activities. It allows for confirmation of valve closures by monitoring pressure on either side of a valve during watermain construction activities. It can further ensure adequate pressure is maintained in a close vicinity to the construction area where a watermain section may be isolated.

For use during development approvals and building insurance classifications. Utilizing the PFL1 will improve the accuracy and record keeping of pressure/flow data during fire flow tests. The PFL1 can provide graphical data for use in NFPA fire flow rating of water systems. Additionally, it can track hydrant pressure during C-Factor testing to assist in the overall identification of the internal condition of watermains and for hydraulic model calibrations. By utilizing the PFL1 loggers during C-Factor testing, there is no need to conduct elevation levelling between test hydrants as the elevation difference can be calculated directly from the logged pressure information collected from the PFL1 installed on both C-Factor test hydrants.


Call toll free: 1 844 689 3282 [NA]
1794 340515 [UK]

Our industry-leading Sales, Technical Support, and Service teams are ready to take you from product selection to initial set-up and continue to provide dedicated support throughout the product lifecycle.


Telluric Currents – The Hidden Energy Source With Powerful Effects On CP

Telluric Currents move continuously around the earth with many factors that influence their intensity, duration and predictability as well as the way that they negatively affect CP measurements and pipeline corrosion.

Solution: GCRTech PFL1
Plan Frequency + Tiers + Options
Iridium Satellite
Globalstar Satellite
Readings every 7 days — Transmitted every 7 days
Readings every 7 days — Transmitted every 28 days
Readings every 2 days — Transmitted every 2 days
Readings every 2 days — Transmitted every 8 days
Readings every 1 day — Transmitted every 1 day
Readings every 1 day — Transmitted every 4 days
Readings every 6 hours — Transmitted every 6 hours
Readings every 6 hours — Transmitted every 1 day
Readings every 1 hour — Transmitted every 1 hour
Readings every 1 hour — Transmitted every 12 hours
Readings every 30 days — Transmitted every 30 days
Readings every 14 days — Transmitted every 14 days
Cover Removal / Door Switch Exception Reporting
Remote Limits
External Contact Alarm Exception Reporting
AC Peak Detection
TS1 Temperature Sensor
Fast Sampling - every 10 sec, 1 sec, or 0.1 sec