The internal field adjustment ranges are from 25 to 2800 psig for increasing and 2.3 - 2675 psig for decreasing.
NEMA 4 and 13 designations represent weather-proof switch construction and NEMA 7 and 9 represent explosion-proof hermetically-sealed designs.
ITT Neo-Dyn Series 100P switches feature a negative rate, Belleville spring snap acting device which offers greater set point stability, vibration resistance, over-pressure capability and cycle life.
Consult the attached pdf for options or contact Teltherm for technical assistance and quotes.