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Home > Pressure Gauges > Pressure Gauges > > 4" Specialty Electrical Contact Gauges

4" Specialty Electrical Contact Gauges
Model Number 40HB

Gauges can be supplied with one or two contacts, which are designed to either open or close as the pressure gauge pointer passes the set point. Mechanical contacts are made from a silver alloy and feature a magnetic block to avoid sparking or faulty switching in high vibration environments. Inductive Contacts are designed for use in hazardous areas, and certified to conform to CENELEC 50014/50020 standards with protection degree Eex ia IIC T6 where intrinsically safe instruments are required. The inductive contact is an electric contact which operates without mechanical contact. It mainly consists of a control head containing a transistorized oscillator and two axial coils. The magnetic coupling between the two axial coils is changed by a control flag which is moved by the pointer. This action changes the internal control unit resistance which is used, by means of an amplifier, to trigger a switch amplifier which in turn causes the actual switch. The contacts can be used with either AC or DC with a maximum voltage of 380 volts and are rated at 30 Watts/50VA. For specific recommendation see the accompanying pdf. Case is AISI 304 Stainless Steel in 4" (100mm) dial size. Available dry or filled with Silicone. Available is Stem Mount Lower Connected, or Back Connected. Ring is AISI 304 Polished Stainless Steel, Bayonet Connection. Window is Acrylic. Socket is OT58 Brass. Bourdon Tube is Phosphor Bronze for ranges up to 600 PSI. AISI 316L Stainless steel for ranges above 600 PSI. Connection is 1/2" NPT, 1/4" NPT available. Movement is OT59 Brass, AISI 304 Stainless Steel plates. Pointer is balanced black aluminum, micrometer adjustable. Dial is white aluminum with black markings. Markings and graduations in accordance with ASME B40.1-1998. Ambient Temperature Limits: -13 to 150F (-25 to 65C). Process Fluid Limits: 212F (100C) maximum. Accuracy is 1.0% of full scale value (ASME grade 1A), 1.6% filled. Temperature Errors: For a normal temperature of 68F (20C) approximately +0.3% error for temperature increase of 18F (10C) and -0.3% error for temperature decrease of 18F (10C). Contact Point Options are available. Additional options are available. Contact Customer Service for assistance regarding options and ordering.

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