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                                          Advanced Specialty Gas Equipment

                                          DELIVERY SYSTEM ACCESSORIES
                                          Model SG6548
                                          Indicating Pressure Switch

                                          Model SG6548The Model SG6548 Indicating Pressure Switch is designed to provide economical pressure monitoring with set-point indication of high purity, toxic and corrosive gases. In addition to providing accurate indication of gas pressure, this 2 inch diameter instrument incorporates a magnetically actuated, hermetically sealed reed switch capable of operating low voltage annunciators, lights or relays.

                                          Moving the index on the front dial to the desired set point sets the switch. A small magnet fastened to the indicating pointer actuates the switch. A magnetic latch on the switch permits the switch to remain "on" or "off" after the pointer passes the operating point, without restraint on the indicating pointer. The switch action is configurable to close on increasing pressure or close on decreasing pressure. The user can change the switch action by removing the front bezel, loosening the pointer screw, and flipping the pointer over. The switch action is noted on the tail of the pointer.

                                          Warning: We strongly recommend the use of our Explosion-Proof Type Pressure Switch Model SG6541 for all flammable and oxygen applications.


                                          Specifications
                                          Mechanical
                                          Dial Size: 2" diameter

                                          Gauge Pressure Range

                                          Adjustable Set-Point

                                          Maximum Temperature: 105°C

                                          Internal Surface: Type 316L Stn. Stl.

                                          Case: 300 Series Polished Stainless Steel

                                          Ring and Window: Polycarbonate window
                                            permanently retained in stainless steel ring
                                             fastened to case with 2 screws

                                          Movement: 300 Series Stainless Steel

                                          Dial: Electrically insulated laminate, white
                                             background, black markings;270° arc of graduations

                                          Bourdon Tube: Type 316L Seamless
                                            Stainless Steel, TIG welded

                                          Connection: Type 316L Stainless Steel
                                            1/4" NPT; low mount

                                          Electrical
                                          Connection: 26 AWG, PTFE insulated,
                                            10' leads; (2 black wires)
                                          Maximum Power: 10 watts DC, 12 VA AC
                                          Maximum Switching Current:
                                            0.5 amps AC/DC noninductive
                                          Maximum Switch Voltage: 28 V AC/DC
                                          Indication Accuracy: ±2% FS between
                                             10% & 70% FS, ±3% FS elsewhere. Pointer will
                                             jump slightly about the set-point due to magnetic
                                             interaction.
                                          Switch Point Accuracy: Switch will operate when
                                             pressure is within ±2%span of set-point.
                                          Switching Differential: 4% of full scale (typically)
                                          Switch Operation: End user configurable; closes on
                                             increasing pressure and opens on decreasing
                                             pressure,or closes on decreasing pressure and
                                             opens on increasing pressure

                                          Bezel Clamp Screw

                                          Table I

                                          Part No. Gauge Pressure Adjustable Set-Point (psig)
                                          Range (psig) Minimum Maximum
                                          SG6548-200 0–200 10 160
                                          SG6548-600 0–600 30 480
                                          SG6548-3000 0–3000 150 2400

                                           

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