Portasonic® CALCULATOR

Handheld tablet for calculating internal pipe pressure from externally-measured flow

Calculate internal pipe pressures using externalnon-invasive and portable flow sensors. To be used alongside the Portasonic 2.FLO® portable ultrasonic flow meter 

P/N: 2618949-CALC


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Calculate Internal Pipe Pressure from External Flow

The Portasonic® CALCULATOR is the first instrument capable of determining the internal pressure within pipes, using non-invasive, external flow technology.  

This calculator is designed to operate alongside our Portasonic 2.FL0® Ultrasonic Flow Meter. The Portasonic is one of the world’s leading non-invasive flow meters and is an essential tool for a wide variety of maintenance and inspection needs.  

The Portasonic® CALCULATOR is designed as a supporting instrument. It uses an empirical equation derived from the laws of fluid dynamics to calculate the liquid pressure to within 5% accuracy. Our knowledge of the properties of 19+ different fluids and 23 different common pipe materials has enabled us to acquire a detailed understanding of the pressure required to drive different fluids at a variety of flow speeds. 

Why measure internal pipe pressure? 

The pressure in a pipe system must be closely monitored to ensure it does not exceed safe tolerances. Critically high pressures can lead to pipe failure, damage to property, and risk to personnel. The durability and safe functioning of pipes, pumps, and related equipment are also affected by pressure. Knowledge of the pressure in a pipe system is therefore important for ensuring that the flow is occurring as expected, in a safe and sustainable manner. 


  • Calculate quickly and easily using an intuitive touchscreen tablet 
  • Save data to records and export via USB or email to ensure traceability 
  • Filter records by date or by pipe 


  • Accounts for temperature and material roughness to produce results of the highest possible accuracy 
  • Combine with the Portasonic® 2.FL0® to verify flow speeds and rates 
  • Determine if your pipe is pressurised to within a safe tolerance 


What's In The Box

  Portasonic® CALCULATOR:Handheld, ruggedised, rechargeable 7-inch touchscreen tablet
  USB Type-C to USB Type-A adaptor:To allow direct plug-in of a USB stick for exporting data
  USB Type-C Cable:For charging and data transfer
  Power adaptor:For charging
  USB Stick:To save your data on
  Quick Start Instructions:Contains comprehensive guidance as to how to use the calculator
  Phillips screwdriver #1 point size:To remove backplate for SIM card (not necessary)

Technical specifications

Technical Specification
  • Height: 216mm
  • Width: 136mm
  • Depth: 19mm
  • Weight: 558g
Waterproof Level





2G:GSM 850/900/1800/1900MHz 

3G:WCDMA 900/1800/2100MHz 

4G:FDD-LTE B1/B3/B5/B7/B8/B17/B20/B66/B71/B28A/B; TDD-LTE: B38/B39/B40/B41

SIM Card

Dual SIM card dual standby (1 micro+1 nano) 


MT6762 Cortex A53 octa core, 2.0GHz; GPU: PowerVR GE8320, 650MHz 


Android 9.0 

Data Transfer

USB Type-C


φ23 loudspeaker, 1 watt 

FM Radio

Yes, need plug in earphone 


7.0 inch HD IPS capacitive touch screen, 1280*800px 




64GB ROM, support storage card up to 128GB


Double cameras, front 2.0MP camera, 13.0MP back camera with flashlight 


Yes, IEEE802.11 a/b/g/n/ac, support 2.4GHz/5GHz dual band wifi 


Yes, also support A-GPS/GLONSS/BDS 




Support, 13.56MHz 


Geomagnetic sensor, light sensor, proximity sensor, gravity sensor, gyro sensor 

I/O Ports

1 x SIM card slot 

1 x TF card slot 

1 x Micro USB port 

1 x 3.5mm earphone jack 


Built-in 8000mAh rechargeable Li-ion battery 

Standby time

Up to 200 hours 

Other features

Calculator, Email, Web Browser, USB export function  

See the Portasonic® CALCULATOR in action.

Frequently asked questions

Pressure gauges are invasive and costly to install in pre-existing systems. The Portasonic® CALCULATOR is ideal for obtaining hassle-free pressure measurements.
The pressure in a pipe varies from a maximum value at the input to a minimum value at the output. It is this pressure differential that drives the fluid through the pipe. The Portasonic® CALCULATOR calculates this maximum value based on the measured flow speed. Thus, the value obtained is the maximum pressure at any point in the pipe system, not including added complications such as valves.
The temperature of a fluid can affect its flow and pressure, which is why the Portasonic® CALCULATOR instructs the user to input the temperature. As long as the substance remains a fluid, the calculations remain valid over a temperature range of -50°C to 150°C. Accuracy, however, decreases with more extreme temperatures.
Yes, the instrument has inbuilt WiFi connectivity.
The battery can last for up to four days.
Excepting the following caveats, the calculated pressure is always accurate to within ±5%.This accuracy holds for clean pipes, free of internal corrosion and residue build-up. It is also valid for temperatures between 10°C and 30°C. Temperatures outside of these bounds will, for the most part, still yield results of a similar accuracy, but these are as yet unverified. Finally, some graded liquids are listed under a general name, for example, crude oil. These take median values for the liquid properties, which will not necessarily be accurate for all grades.

Related Products

The Portagauge® 6 is a multiple echo ultrasonic thickness gauge for measuring thicknesses of various metals and hard plastics, which ignores any coating up to 20mm in thickness.

P/N: 2099382-6

The Permaflow® is a fixed, clamp-on, ultrasonic transit time flow and heat meter that is non-invasive for measuring the flow rates of liquids containing less than 10% of gas/solid contents. It is mains powered, designed for 24/7 monitoring and is accurate to +/- 0.5% of measured value under ideal conditions.

P/N: 3578010-FLOW

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