Normally open. Closes at 4 PSI. Single circuit with two insulated terminals. Switch has silver contacts enclosed in weatherproof case. 1/8" male pipe thread connection.
If using on a water application (Rotax for instance) use
I had a pressure switch that was leaking and replaced it with this one which fixed the issue.
worked perfectly, easy install, and it looks great too !!!
HOBBS HOUR METER PRESS SWITCH+ is the one to use with water applications.
The Hobbs Hr MTR Pres Switch M4006-4 is normally open and closes at 4 PSI. The 2 contacts are (NO) normally open and (C) closed.
Yes, the Honeywell Hobbs Hour meter pressure switch has male 1/8" NPT thread. These thread directly into the 1/8” pressure port on the engine.
The operating pressure of this unit is 4 PSI, with a maximum burst pressure of 500 psi.
Total length of the Honeywell Hobs pressure switch M4006-4 is approximately 2-1/2 inches.
The Honeywell Hobbs meters were used in many OEM production aircraft. However, they are not FAA Approved. Please check your aircraft parts manual or check with your local A&P mechanic to see if this can be installed in your certified aircraft.