Calibrate Pressure Transmitters Much Easier Now

The Higher the Pressure the Tighter the Seal

Ralston NPT Male Quick-connect Adapters make calibrating pressure transmitters much easier. Using a unique pressure-assisted seal the Ralston Quick-test male NPT QD adapter saves time and prevents leaks. Connect to any female NPT process connection without using thread tape or a wrench. This has saved technicians countless hours in the field because they don’t have to remove residual thread sealant from pressure transmitter ports prior to calibration. Because the seal is made using an o-ring and not thread tape the adapter will seal even in ports which would leak using a standard NPT adapter.


  • innovative Male NPT quick-connect on one side and a male Ralston quick-test on the other.
  • Provides a secure connection up to 5000 psi/345 bar pressure
  • Safely self-vents instead of blowing off if  you forget to vent off the pressure
  • No tools required, hand tighten only

Watch the video below to see how you can quickly connect to a pressure transmitter without using tools or thread tape.

JM Test Systems® sells & rents Ralston hand pumps and sells Ralston fittings for all your measurement and calibration solutions.

The fittings used in this video are the 1MS0-QD & 2MS0-QD
Call us for a quote today at 800-353-3411