7440 with Inductive Ring Sensor
Inductive Ring Sensor & Fiber Optic Sensor
INDUCTIVE RING SENSOR
Inductive Ring Sensor Alarm available for 7430, 7440 Series
Inductive Ring Sensor 7440 Series flowmeters with metallic floats can be ordered with an inductive ring sensor that is able to detect a predetermined rate of flow and is compatible with stainless steel or Carboloy floats only. Inductive ring sensors are 2-wire, DC, low current devices and are designed to be used with a remote intrinsic safety barrier /switch isolator. Sensors are available as either proximity or latching devices. The sensor can be positioned to trigger at any point on the scale. It is able to detect the metal float by producing an electromagnetic field that senses the float within its sensing zone.
The inductive sensor connects to a barrier/switch isolator which powers the sensor and provides the desired switching option. Barrier/switch isolators are available with 220VAC, 110VAC or 24VDC supply voltage requirements, contain single pole double throw (SPDT) relays, and are DIN rail mountable. See barrier/switch isolator specifications for electrical connections and further details.
Maximum operating temperature 40° C for 1/8” float; 70° C for 1/4” float. Note: We can supply the safety barriers/switch isolators upon request. User must provide the power supply voltage.
Note: We can supply the safety barriers/switch isolators upon request. User must provide the power supply voltage.
ELECTRICAL SPECIFICATIONS
Type | Inductive Proximity or Latching |
Supply Voltage | 5-25V DC (Switch Isolator) |
Output | NAMUR |
Output Load Current | <=1 mA – Float Present >= 3 mA (15 mA max) – Float Absent |
Switching Frequency | 2 kHZ |
Housing Rating | IP67 |
Wiring | PVC Covered, 2 Conductor, 26 AWG, 6.5 Feet Long. Brown (+), Blue (–) |
Pepperl & Fuchs Ring Sensor Approvals | UL: General Purpose FM: Intrinsically Safe CSA: Intrinsically Safe CENELEC: Intrinsically Safe |
Electrical Connections | See barrier/switch isolator specifications for details. |
FIBER OPTIC SENSOR
The fiber optic alarm sensor is an available option for all 7440 Series flowmeters and is compatible with all float materials except sapphire. The sensor is used to detect a predetermined rate of flow. The sensor can interface directly to a Programmable Logic Controller (PLC) or when connected to a separate relay can trigger a local or remote alarm.
The fiber optic sensor is mounted in a junction box attached to the side of the flowmeter. The sensor uses a pair of fiber optic cables, an emitter and receiver, to transmit the light generated by the sensor. Note: Maximum operating temperature 131° F.
ELECTRICAL SPECIFICATIONS
Supply Voltage | 10-30 VDC |
Supply Current | 25 mA |
Output | NPN Sinking, N.O. & N.C. PNP Sourcing, N.O. & N.C. |
Output Rating | 150 mA Max Total Load |
Output Response Time | 1ms |
Off State Leakage Current | 1 MICOAMP @ 30 VDC |
Output Saturation Voltage | < 1 V at 10 mA DC < 1.5 V at 150 mA DC |
Repeatability | 0.25 ms |
Housing Rating | IP67; NEMA 6 |
Operating Temperature | -5° to +131° F |