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721 Ultrasonic Switch
Brand: SOR IncThe 721 ultrasonic switch is an advanced single-point device designed to meet your needs for overfill protection.
The 721 includes a “Sensor Monitor.” This circuit continuously tests the functionality of the electronics and sensor. The “Sensor Monitor Relay” de-energizes if a fault is detected.
The 721 is available with a variety of sensor types to meet most process conditions.
It is available integral or remote mounted and comes standard with field-selectable failsafe.
Features- No calibration required
- Continuous self-test (sensor monitor) verifies operation
- FM Approved or CSA Certified for hazardous locations
- Field-selectable failsafe
- On/Off time delay is standard
- Rostechnadzor (RTN) standard certificate
Specifications
Brand
Adjustment Type
- Fail-safe: Field Adjustable
Ambient Temperature Range
- -40° to 71° C (-40° to 160° F)
Approvals & Certifications
- CRN
- CSA: Class I, Groups C, D, Class II, Groups E, F, G, Class III, Div. 1
- FM: Class I, Groups C, D, Class II, Groups E, F, G, Class III, Div. 1
- RTN
Cable Length
- Remote Cable: 50 feet (15.2 metres)
Conduit Connection
- 3/4” NPT
Delay Time
- 0 to 30 seconds
Electrical Contacts
- Gold-Contact Relay
Enclosure Finish
- Housing Exterior: Fungicidal Varnish
- Powder Epoxy Coated
- Powder-Coated Epoxy
Environmental Protection
- Explosion-proof
- Intrinsically Safe
- IP65
- IP66
- NEMA 4X
Input Power
- Input Power (Line): 120 Vac, 50/60 Hz
- Input Power (Line): 24 Vdc
- Input Power (Line): 240 Vac, 50/60 Hz
- Input Power (Loop): 11-36 Vdc Intrinsically Safe
Loop Resistance
- 650 ohms, Max.
Maximum Current
- Draw (Line Power): 220 mA, 24 Vdc
- Draw (Line Power): 30 mA, 240 Vac
- Draw (Line Power): 60 mA, 120 Vac
Mounting
- Pipe Mounting Kit
- Remote Electronics Flat-Surface Mounting Bracket
Name Plate, Tag Material
- Stainless Steel
- Fiber
Output
- Output Typical (Line): 10 A DPDT at 250 Vac
- Output Typical (Line): 10 A DPDT at 30 Vdc
- Output Typical (Loop): 16 mA (Wet) for Alarm
- Output Typical (Loop): 19 mA Sensor Monitor
- Output Typical (Loop): 5 mA Sensor Monitor
- Output Typical (Loop): 8 mA (Dry) Alarm
Pressure Range
- psi: 2,000 (kPa: 13,800, bar: 138) - Max.
Process Temperature
- -40° to 121° C (-40° to 250° F)
Repeatability
- 0.078” (2 mm)
Response Time
- Response Time (Line Power): 250 milliseconds (ON/OFF)
- Response Time (Loop Power): 0.5 second (ON)
- Response Time (Loop Power): 5 seconds (OFF)
Sensor, Probe Material
- Metal
- Teflon
Sensor, Probe Style
- Ultrasonic
Sensor, Probe Type
- Notch
- Viscous
Switch Type
- DPDT Relay