Si-PM3 Digital Differential Pressure Manometer – Compact, Accurate HVAC Pressure Measurement


Experience precise differential pressure measurement with the compact, professional-grade Si-PM3 Digital Differential Pressure Manometer. Designed for HVACR technicians, this palm-sized tool offers portability, versatility, and accuracy—making it the ideal choice for both routine maintenance and advanced diagnostics.


Key Features at a Glance

  • Compact & Lightweight – Easily fits in your hand or tool bag for hassle-free transportation.
  • Highly Accurate – Provides reliable readings across a wide pressure range for critical HVAC applications.
  • User-Friendly Design – Simple interface and quick setup minimize downtime on the job.
  • Mobile Connectivity – Integrates seamlessly with the free Si-HVACR Measurement App for real-time monitoring and reporting.


Multi-Unit Pressure Measurement

Whether you're working with residential systems or complex commercial HVAC installations, the Si-PM3 supports a wide range of pressure units to match your needs:


  • Inches of water column (inH₂O)
  • Pascals (Pa)
  • Millibars (mbar)
  • Hectopascals (hPa)
  • Millimeters of water (mmH₂O)
  • Pounds per square inch (psi)

This flexibility ensures compatibility with any system you’re working on, no matter the region or standard.


What's Included in the Box

Every Si-PM3 Digital Manometer Kit comes complete with everything you need to get started right out of the box:


  • Two clear measurement tubes (Ø4x6 mm, 1 m / 39.37’’)
  • Certificate of Conformity for guaranteed accuracy
  • Quick Start Guide for fast setup
  • Three LR03 AAA (1.5 V) alkaline batteries
  • Durable carrying bag for easy transport and equipment protection


Enhance Your Workflow with the Si-HVACR Mobile App

Pair the Si-PM3 with the free Si-HVACR Measurement App (available for iOS and Android) to unlock advanced functionality:

  • Live Data Display – View real-time pressure readings directly on your mobile device.
  • Graphical Analysis – Visualize pressure trends with graphs showing average, min, and max values.
  • Data Logging – Access and store historical measurement data for future reference.
  • Professional Report Generation – Export results in PDF, CSV, or XML formats with up to 4 photos per report—perfect for documentation and client communication.



Ideal for HVAC Professionals

From air flow balancing to filter performance testing, the Si-PM3 is built to support HVACR technicians with reliable, on-the-go pressure diagnostics. Whether you're conducting residential inspections or working on large-scale commercial systems, the Si-PM3 offers the accuracy, portability, and digital integration you need.


Digital differential pressure manometer

    Features:
 

  • Air velocity and airflow with Pitot tube (optional)
  • Measuring range: -150 to+150 hPa (-60 to 60 inH2O)
  • Backlit LCD screen
  • Magnetic backing for easy fixing + Carrying bag
  • FREE Si-HVACR Measurement MobileApp



Digital Differential Pressure Manometer

Why Choose the Si-PM3 Digital Differential Pressure Manometer?


  • Compact and portable for ease of use in any HVAC environment
  • Multi-unit measurement support to fit all your pressure measurement needs
  • Integrated app connectivity for real-time data visualization and efficient reporting
  • Comes with all essential accessories for immediate use


Optimize Your HVACR Pressure Testing

Whether you’re performing routine system checks or detailed diagnostics, the Si-PM3 Digital Differential Pressure Manometer offers precision, convenience, and smart connectivity—making it an essential tool for HVAC professionals.


Technical Details
Parameters Air velocity
Airflow
Differential Pressure
Displays 2-line display
IP Protection IP 40
Battery Life 170 hours
Standards 2011/65/EU RoHS II
2012/19/UE DEEE
2014/53/EU RED
Wireless Connection 1
Power Supply 3 alkaline batteries LR03 AAA 1.5 V
Operating Temperature min 0.00 °C Max 50.00 °C
Storage Temperaturee min -20.00 °C max 70.00 °C
Dimensions 70L x 33W x 141 H
Weight 200g
Parameters Measuring Units Accuracy Measuring Range Resolution
Pressure hPa, mbar, Pa, mmH2O, inH2O, inHg, psi ±(1.5% of value +0.2 hPa) ±(1.5% of value +0.09 inH2O) from -150 to +150 hPa from -60 to 60 inH20 001 hPa / 0.001 psi / 0.01 inH20 / 1 Pa / 0.01 mbar / 0.1 mmH2O / 0.001 inHg
Air Flow** m3/h, m3/min, m3/s, cfm from 0 to 9999 m3/h 1 m3/h / 0,001 m3/s / 0.01 m3/min / 0.1 ft3/min
Air Velocity*** m/s, fpm from 2 to 80 m/s from 394 to 15748 fpm 0.1 m/s 1 fpm

Air velocity displayed on the instrument is calculated at fixed conditions: L Pitot tube with a deprimogen coefficient of 1.0015, at 20°C (68°F) and 1013.25 hPa (29.92 inHg). When the app is used to display air velocity, these parameters can be modified.


*All the accuracies indicated in the technical details were stated in laboratory conditions, and can be guaranteed for measurements carried out in the same conditions.
**Calculated values, only available on the app
***Calculated values