PRODUCT SPECIFICATIONS > INSTRUMENTATION
MM Pressure Switch CLARK SOLUTIONS
MM Pressure Switch
Set Point Range, 2-120 PSI
DESCRIPTION
Model MM is a simple, reliable low cost pressure switch that uses a spring loaded diaphragm as the sensing element. A Buna-N diaphragm is standard, however, a selection of other diaphragm materials are optionally available.

In operation, the diaphragm actuates a snap action electrical switch that insures a positive, instantaneous electrical contact under all operating conditions.
MM Pressure Switch diagram
SPECIFICATIONS
Set Point Range: 2-120 PSI (0.14-8.3 bar)
Set Point Tolerance: ±1 PSI or 5% (0.07 bar)
Max Operating pressure: 600 PSI (41bar)
Proof Pressure: 1800 PSI (124 bar)
Switch Deadband (differential) - 8-16%
Current Rating: 5A (to 24Vdc, 240Vac),resistive
Media Connection: 1/8” NPT or 1/4” NPT
Circuit Form: SPST-NO, SPST-NC, SPDT
Electrical Connections: 8-32 screw terminals
Machined Switch Body: Brass
Diaphragm: Buna-N (consult us for other materials)


ORDERING INFORMATION
ORDER NUMBER ABCDEF
EXAMPLE MM-1C90RWL
PLEASE CALL 1-800-253-2497 TO ORDER THESE ITEMS
A=Model B=Connection C=Circuit D=Set Point E=Set Direction F=Electrical Connection
MM 1=1/4" NPT A= SPST-NO Specify between  2-120 PSI

 

 R=Rising WL=Wire Leads, 18"
2=1/8" NPT B=SPST-NC F=Falling QC=1/4" Spade
Consult us for other connections C=SPDT   WP=Weather Pack
  MP=Metri-Pack
ELECTRICAL CONNECTIONS
Pressure Switch Diag 2 Pressure Switch Diag 3 Pressure Switch Diag 4 Pressure Switch Diag 5
18 AWG wire, 18” long
Black-common; Red, normally open; Blue, normally closed
Quick Connects
1/4” Spades
Female Tower Type
18 AWG wire
6” complete length
Female 280 Series
18 AWG Wire
6” complete length