860-928-6551 Putnam, Connecticut


Stop an entire operation if one machine fails.

PROX 120 Inductive Proximity Switch

Micro-controlled, Field-adjustable, Multi-setpoint Speed Monitor

The PROX 120 Proximity Switch is a non-contacting speed sensing device which converts pulses from a ferrous target to an electrical signal. The speed monitor utilizes a microcontroller and proprietary internal software to precisely monitor the RPM rate of the rotating ferrous target(s). Time between pulses is compared to application appropriate, user-defined settings. The PROX 120 is packaged in a NEMA 4/5 enclosure with a transparent Lexan™ cover for dust and moisture protection.

  • Large sensing range:
    • 6 – 30,000 RPM based on 1 pulse per revolution
    • 1 – 7,500 RPM based on 4 pulses per revolution
    • 0.1 – 3000 RPM based on 60 pulses per revolution
  • Simultaneous speed monitoring:
    • 20-99% Under Speed / 101-199% Over Speed
  • Easy to program and field adjustable
  • 4-character alphanumeric LED display shows alarm status in low light
  • Non-contact sensing – not directly coupled to a shaft
  • Epoxy-coated cast aluminum housing with Lexan™ cover
  • Proximity sensor features:
    • 10-30 VDC NPN M18mm Shielded N.O.
    • 500 Hz, 6′ (1.83 m) cable
    • 0.315″ (8.0 mm) sensing distance
    • Will pick up any ferrous material — magnet not required

Need assistance choosing the appropriate speed switch? Fill out the Application Data Sheet and a Sales Engineer will help determine which switch is right for your specific application.

Dazic® Application
Data Sheet

PROX 120
Conduit Entry Power/signal wires: 1/2″ NPT
PROX wire: 3/8″
Temperature Range -40° to +158° F
(-40° to +70° C)
Voltage Options 120/240 VAC or 24 VDC
Supply Current 100 mA maximum
Output Single Pole 10-A SPDT Relay
NEMA Rating 7/9
Frequency Range Controller: 0.1 Hz to 2500 Hz
Sensor: 500 Hz
Memory Nonvolatile, 10-year retention

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