Model 120

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Functions and Applications

The Model 120 piston style Differential Pressure Switch is  CSA Certified to both the Canadian and U.S. Standards and U.L. Listed to the U.S. Standards.  The entire assembly is Certified for use in Class I, Division 1, Groups C, D; Class II, Division 1, Groups E, F, & G Hazardous locations.  The entire gauge and the switch is enclosed in a rugged flameproof enclosure.  The use of reed switch technology eliminates the need for an additional explosion-proof seal fitting within 18” of the enclosure.

The Entire Assembly is Certified for Hazardous Locations

Specifications:

Certifications:  CSA Certified, UL Listed, Class I, Division 1, Groups C, D;
Class II, Division 1, Groups E,F, & G.

Switch Options:

† Product os the Switching Voltage & Current Shall Not Exceed the Power Rating

Set Point Accuracy: 2%*

Interface:  1/2” Conduit Entry with Color Coded  24”, 18 Awg. Flying Leads

Enclosure:  NEMA 7 (Flame-proof), NEMA 4X optional (In addition to NEMA 7)

Switch Adjust: External Access to switch adjust internal to enclosure

Input Power: None.  (Switches do not need input power to operate)

Body:

Working Pressure:  5000 PSIG (345 bar)

Differential Over-range:  5000 PSID (345 bar)

Range: 0-5 PSID (0-0.35 bar) to 0-100 PSID (0-7 bar)

Process Connections: 1/4” MNPT Bottom

Materials:  AL, 316 / 316L SS, Brass

Indicator:

Accuracy:  2%* 

Dial Size:  2 1/2” (Standard), 3 1/2”, or 4 1/2” None (Switch Only)

Scales:  Uni-directional , Bi-Directional

*  ASME B40.100 Grade B