RAPMAS PMS 4 is a pressure mether system, designed to determinate pressure on two measuring points. Also, with an included software is possible to measure the differential pressure.

  • LCD screen for both sensors
  • 10-meter cable between measuring point and device
  • 0 – 4 Bar range
  • Alarm function on local PC, eMail, web site, SSH client
  • System for measuring logging over CSV file, web site, database, SSH client
  • Integrate web server in RAPMAS PMS
  • Calculation for hydrodynamical pressure
  • Software support for units in bar, PSI, Pascal, Atmosphere (technical and standard), mmHg, etc
  • Powered over USB cable
  • Support on Windows 10

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With a RAPMAS PMS 4, You can measure with high precision the pressure on two different points. The values of the measurement are presented on an LCD. With RAPMAS PMS software, You can also calculate a differential of these two pressure values. Also, a huge number of additional functions can make Your life easily.

The pressure sensors can be used in a non-corrosive environment for air and liquid systems. With a long cable is easy to track the pressure in systems where the measuring point and the reading point are far away from each other, like control rooms, water plants, agriculture irrigation systems, etc.

RAPMAS PMS software is a strong platform for data acquisition and distribution. Can be easily configured to collect and store measured pressure in a different format and to different platforms such a database, Linux/Unix programs, etc. The software can show the pressure values in different units, on a scale, graphic, and numerical base. Sending alarms in a case of too low or to high pressure can be done over email, web, SSH, and other ways.

Technical information

Number of sensors2
Sensor cable length10 meters
Sensor materialStainless steel
Thread Type1/8" -27 NPT
Measuring interval0 - 4 bar
Pressure of sensor damage8 bar
Signal level0.5V~4.5V DC
Accuracywithin 2% of reading (full scale)
Working temperature0°C to 80°C
Load resistance≤ (supply voltage: 6.5 V / 0.02 A) Ω
Long-term stabilityless than 0.1% FS per year
Temperature effect on zerotypical: 0.02% FS/°C; maximum: 0.05% FS/°C
Temperature effect on sensitivitytypical: 0.02% FS/°C; maximum: 0.05% FS/°C
Shock resistance1000g
Anti-shock≤ +/- 0.01% FS (X, Y, Z axis, 200Hz / g)
Insulation resistance100 mΩ 500 VDC
Power supply5V DC over USB, maximal 200mA
Connectivity to PCvia USB interface


No, the differential value will be calculated on PC with the RAPMAS PMS software.
No, the unit on LCD is in Bar, but in RAPMAS PMS Software can You choose between Bar, PSI, Pascan, atmosphere, etc.
No. On the LCD is presented the data from both sensors in Bar. If You don't need the differential value, You can use it without a PC or software. As a power supply just use a simple phone charger or any USB charger.
Maximal 10 meters. The longer cable can produce an error by measuring.
No, so long that is only a sensor in a humid environment. The device can't be in a place with high humidity.
Yes if the temperature is not over 80℃ or above 0℃.
Yes, with a hydrodynamical pressure calculation You can choose as a unit meter of water column or feet of the water column. Take a carer that 1 meter or water column is about 0.1 bar.
No, the minimal detectable pressure is 0.00 bar.
For a short time duration, not longer than 5 seconds, it can measure 20% over the maximal value.
If the pressure exceeds 100% of the maximal value will be irreversibly damaged.


Software manualPDF EPUB