The INVALCO Model CADMEX is an adjustable-range diaphragm pressure switch with an explosion-proof Micro Switch for systems that need electrical control. Use it to alarm or control over- or under-pressure, or to cycle a process between two pressures. Removing one drive collar converts it to manual reset, and an optional seal around the adjustment screw allows pressure on the upper port too, so the switch can act on the differential between two processes.
Key specifications
Maximum working pressure: 100 psi
Control switch: Explosion-proof Micro Switch, SPDT standard (UL and CSA hazardous-area approved), DPDT spring-loaded optional; 15 A at 125/250/480 VAC, 1/2 A at 125 VDC, 1/4 A at 150 VDC (as printed)
DPDT note: no adjustable differential; actuates and releases at about the same pressure
Spring ranges: 5-12, 10-27, 25-45, 40-60 psi (factory set to mid-range)
Process connection: 1/4" NPT; conduit opening 1/2"-14 NPSM, three 12" leads
Materials: Aluminum diaphragm case; Buna-N diaphragm
How to specify / order
CADMEX SPDT: 5-12 psi 80001102; 10-27 psi 80001104; 25-45 psi 80001105; 40-60 psi 80001111
CADMEX DPDT: 5-12 psi 80001117; 10-27 psi 80001103; 25-45 psi 80001118; 40-60 psi 80001119
Specify the actuating point; add the differential (upper-port) seal if needed
Bulletin notes: the DC rating is printed as 1/4 A at 150 VDC (the CMEAQX bulletin, SSIN008, gives 1/4 A at 250 VDC for its Micro Switch); and the ordering table shows the same adjustable span values for DPDT as for SPDT, although the text says the DPDT switch has no adjustable differential. Confirm both with the factory.
Pricing and lead time are quoted per configuration. Send the model code (or your application details), product, flow range, and pressure/temperature to Flow Measurement Services for a quote. Specifications summarized from Smith Meter (INVALCO) bulletin SSIN013 Rev 0.1 (8/17); confirm current data with the factory before ordering.
Smith Meter (formerly FMC Technologies / TechnipFMC Measurement Solutions), now manufactured by Guidant. Flow Measurement Services supplies and services Smith Meter equipment.